DTV design process, what issues should be considered oled module

In addition to determining the required HD format and system design, we must also consider the HD to the impact of cost and system flexibility. Undoubtedly, HD clearly higher system cost, and the system needs to support a variety of applications. serial oled display
1080i60 video decompress decompressed SD video than six times greater than the uncompressed SD 720p60 big five times, so the final analysis, the system should provide more than SD to HD high six times the processing throughput. In addition, more advanced codecs use more memory, support for higher processing functions to achieve a higher compression ratio, so that the system will be a corresponding increase in required, for example, will lead to an increase in component costs. However, as the cost of all the same semiconductors, over time these will gradually decrease. Therefore, the system manufacturer, the problem so now the cost is high time to support HD, 2012 or in the future to continue to support SD, until the unit costs down, and HD needs to improve before entering the market.
In addition, manufacturers must also consider its design versatility, because almost all of the current design of digital video systems must solve codec continuous development and improvement issues. Whether it is for DTV broadcasting, IPTV, video telephony or for various other applications, H.264/MPEG-4 AVC in the coming years will play its enormous influence. There are also a number of competing standards, such as WMV9/VC-1 and China, AVS, and the ITU / MPEG standards, and they are implemented using different methods. Set-top boxes (STB) and other systems may need to dynamically support a variety of standard formats and different variants may also be connected to the entertainment and gaming devices, and support home computer network, in the future we have to support video calls. This system not only to support the decoding, it is also important to support transcoding and rate conversion, and video streams to support different display, not to mention support different applications and control software. Even relatively closed video surveillance and other applications also support the codec upgrade and search and identify other characteristics. Video input streams and applications will continue to change, HD output will be more abundant, so the system obviously need to have some flexibility. low temperature lcd
Designers choose to support video system technology must remember these issues.
We caught among technology trends. HDTV technology is nothing more than a decade has been the development of little interest because of consumer demand, they need a larger screen, but do not ask for clarity. Reid's story - he had a big screen wall TV 16x9, I felt enough, did not think this has anything bad - HDTV comeback, because the technology costs, rationalize the price, but you really want to improve improve the pixel resolution Cost - snowball getting bigger; FCC requirements also have a stimulating effect - the development of an irreversible trend, and this is our way of life; decision has been made, to whom we want to continue to work hard. If you believe that the existing good enough, this is not enough, we need to continually improve the quality and to beat the competition.

Design and implementation of mobile TV TFT Display Module

Mobile TV module (CN1010) key design techniques
SMS1010 is a multi-standard, multi-band, multi-interface, and low-power mobile TV chip, thus making the module design must be considered to be fully realized function of the chip advantage. CN1010 speaking on digital TV modules, in particular the following points must be considered when designing key technologies: ground design, power design, PCB design.
Ground all SiP design is the most challenging chip designs in part because the RF SiP chip internally integrated part and digital part, and in the external ground pin with ubiquitous, engineers must fully understand the requirements of each The role of the root ground, the only way to a good analog ground, digital ground, the shield to effectively split and the final connection. In SMS1010 digital TV chip pins 127, the ground pin 32 there, and distributed in all directions in the BGA package, the full understanding of the role of each ground pin and then it is necessary to separate the ground. Every engineer knows that the analog and digital ground to separate the design, single-point ground, but good to know where engineers need to split, how to split the ground. CN1010 only effectively split the analog ground, digital ground and shield ground, but also for the SMS1010 multi-band technology is more evident among the three bands, RF, and between the figures were designed in isolation, thus greatly improving the CN1010's receiver sensitivity and robustness. Low Temperature Display
Power supply design CN1010 mobile TV module is a difficult, because SiP chip power supply pin fragmented and SMS1010 chip also has a unique low-power technology, so in the design of the power management circuit must consider not only to different standards of the RF power supply voltage, Core power supply and interface, you also need to consider how to make the SMS1010 chip low power consumption is maximized, so that the power consumption of the external circuit to maintain a minimum. SMS1010 Another feature is to support multi-standard, which also requires the power circuit must be designed to support a variety of standard mode the supply current. Therefore, we in the design of DC / DC technology to fully enhance the effectiveness of the use of the power, and the power to choose according to different filter capacitors, thus ensuring a stable and reliable power supply.
Digital TV module PCB design Another difficulty. Undoubtedly, the use of multi-layer PCB is an inevitable choice, but the choice of layers (4 layers / 6 layers / 8 layers) and the chip itself is the point spacing, processing technology, the module size has a complex relationship. CN1010 speaking on digital TV modules, because SMS1010 dot pitch 0.5mm, BGA127 package irregular distribution, and design requirements to provide customers with multiple interfaces, so had to play connect the chip pin hole, so that the production process is very complicated. In order to process complexity and balance between the cost of production, CN1010 chose the 4-layer process, namely component / analog signal layer, ground floor, power / signal layer, the auxiliary signal / ground layer, so the design of wiring difficulty increased, but the total cost of production is appropriate. Character OLED Display

From a technical point of view of the imaging principle Fresnel optical screen oled module

Rear projection screen is widely used in optical large conference room, command and control centers, training and education, video conferencing, showrooms, exhibition halls, auditoriums, stadiums, concert halls, supermarkets, airports, railway stations, docks, cafeterias, windows and other occasions and even a variety of strong ambient light complex environments. So in the end what is the Fresnel optics for the optical screens and screen, how they imaged it, the traditional projection screen what difference does it? Character OLED Display

1, the optical screen definition
Contains one or more optical lens system called optical projection screen screen, inside the lens, the light is refracted, the direction is changed, only the rear projection screen to control the direction of light, so optical screens have only rear projection screen. The direction of light depends on the refractive index of projection screen material and the cross-sectional shape of the lens.
2, the optical Fresnel lens
Fresnel lens surface of the lens, only play a part, if other parts removed and leveled a valid part of the lens (shown at right) to get a Fresnel lens. Lenses from CAD / CAM machining center using diamond cutting, a screen, as many as 10,000 different lens profile, rear projection screen molds huge investment, DNP company is the sole owner of its own mold factory rear projection screen manufacturer. DNP the product of each series has a different focal length; each section of the screen size = pitch (resolution). Graphic OLED Display

COG classify causes of corrosion oled module

1, COM electrode corrosion: is electrochemical corrosion and stress corrosion, electrochemical etching is due to the different metals have different electrochemical potentials, or the same material but the potential presence of a potential difference, and deposit each COM potential difference between the electrodes. Because the COM electrode in the LCD manufacturing process required for cutting operations, the cutting process marks if they cause damage to the COM electrode crack, stress, corrosive environment in the event of the COM electrode corrosion occurs. Low Temperature Display
2, ACF corrosion under: Electrochemical corrosion and crevice corrosion, in addition to electrochemical corrosion, crevice corrosion occurred at the gap and there is stagnation at the surface of the solution of the shelter local electrochemical corrosion. To generate a crevice corrosion, must have a gap wide enough to allow the liquid to enter it, but it also allows stagnant liquid flow, ACF position in contact with the ITO to form a gap, there are ions contaminated liquid, corrosive power.
3, crevice corrosion: Caught not clean the glass, leaving the water, crevice corrosion, electrochemical corrosion.
4, ITO electrode surface corrosion: pitting, ITO surface caused by the presence of contaminants present during power electrochemical corrosion.
Based on the above analysis, according to the theory corrosion, COG corrosion by corrosive only different aspects of the classification made, but the basic belong to electrochemical corrosion, which occurs when the corrosion basic conditions: Solution, power, contamination, stress. For the COG process control, if no dirt on the clean ITO, or some kind of solution exists in the electrodes, or the LCD manufacturing process causing damage COG electrodes will cause the LCD to power after a period of COG display or electrode corrosion. custom lcd module

Character LCD Modules COG category classification of corrosion phenomena

According to industry corrosion occurs, COG type LCD corrosion phenomenon occurs mainly in the following four categories:

1, com electrode corrosion phenomenon of the corrosion of ITO on the screen at the edge, if observed under the microscope, it is found that corrosion of parts of the dirt present. OLED Display

2, ACF ACF corrosion under the following corrosion, the corrosion phenomenon generally occurs in the ACF under control terminal electrode and observed no obvious dirt, higher voltage V0 and VOUT prone, is generally hot and humid in the power to do trial discovery.

3, crevice corrosion of the electrode crevice corrosion, the corrosion phenomenon occurs in cracks at from under the microscope, cracks at the presence of black material. May be the mechanism which produces the cleaning is not clean, or the composition of the cleaning solution with a great relationship.

4, COG electrode surface corrosion: corrosion on the ITO electrode surface, showing a point of corrosion, other normal position, this position can be seen corrosive contaminants. TFT Display Module

Detailed electronic paper is how it works oled module

E-wrap design with two components, the first one of course is the electronic ink, sometimes also referred to as "front panel"; another component of the relative is also known as the backplane, is mainly used to produce electronic ink page circuit assembly text or image. lcd module 
After the birth of the concept of electronic ink many years, engineers have developed a variety of manufacturing methods of electronic ink. E Ink was born in the seventies of last century, largely comprising a layer of tiny plastic beads of flexible plastic sheet, every little beads are packaged in tiny oil capsule, into the suspended state, so every little beads in Plastic plates are free to rotate. Each hemisphere beads with different colors and different charge. When the electric field is applied back on the beads, beads force rotation, thus forming a pattern of color. Of course, electronic ink is also limited, the brightness is relatively low, difficult to improve the resolution, and the lack of color. As the originator of electronic ink technology, electronic ink are still constantly improving in order to solve the above problems, but comes more and more manufacturers are optimistic about the prospects for electronic ink in recent years, the development of other improved design.
Electrophoretic electronic ink contains millions of microcapsules, each microcapsule diameter of about 100 microns, and the cross-sectional diameter of the hair rather our adult. Each of the main components of the microcapsule, transparent liquid, which carries a lot of white particles and negatively charged black particles positively charged. When the electrophoresis "Front Panel" negative field is applied, all of the white particles move to the top of the microcapsules, is then presented to the reader of a white point, and all of the black particles sink to the bottom of the microcapsules, in the eyes of the reader disappeared. When a positive electric field is applied, the black particles will move to the top of the white particles sink to the bottom, on the formation of black text or images. Electrophoretic electronic ink technology has its own characteristics, brightness and resolution targets, based on electronic ink technology it is more than good, but in one respect they are the same, but the disadvantage is the monochrome display technology, can not render colors.
Another drawback electrophoretic electronic ink is its low refresh rate, so that the technology is not suitable for displaying dynamic content such as animation and video. This is also due to the color particles in the electric field moves from one end of the microcapsules to the other side still needs to spend some time, the screen switches slowly caused. OLED Display

Large-size color filter manufacturing process and other technical TFT Display Module

COA technology
COA technique is to prepare a color resist technology on the TFT substrate, its main advantage is that it can increase the pixel aperture ratio and the lcd modules  the applied high-end products. In addition, because there is no CF glass substrate and the TFT substrate alignment problem can be reduced so that the difficulty of the process cell. But the technology will lead to a substrate COA overall yield rate. In addition, in order not to affect the normal operation of the TFT, but also requires a dielectric constant less than 3.5 color resist.
Resin BM
BM conventional materials used for the Cr / CrO, but there is a high reflectance, and environmental pollution problems. Therefore, the inorganic metallic materials have been gradually replaced by the organic resin-type BM. As a negative photoresist resin-based process and the BM color pigments resist the same manufacturing process.
OLED with color filters
The use of color filters to achieve white OLED + OLED color display has gradually been many research institutions and enterprises are concerned.
Industry Status and Prospects
Since Japan's Toppan Printing and Dai Nippon Printing, respectively, in 1985 and mass production of color filters since 1986, the majority of patents are Japanese manufacturers to master. But with industrial development, Taiwan, South Korea also by obtaining authorization and independent research and other ways to enter into this industry, but the character oled display panel manufacturers have come to realize that the color filter is the trend homemade. Domestic production line of color filters less, and more for G 4.5 or less. With the domestic high-generation TFT production line and matching color filter production line put into operation, will change the color filters to import large quantities of the situation, raise the level of domestic LCD industry chain.

Large-size color filter manufacturing process new method oled module

With the constant increase of the lcd modules  the original traditional CF processes are obviously inadequate, new process methods have emerged. The major ones are DuPont thermal multilayer technology (Thermal multi-layer tech.), Toppan Printing (Toppan) for reverse printing method (Reverse printing method) and Dai Nippon Printing (DNP) ink-jet printing method (Ink Jet printing) .
Hot multilayer technology
Heat multilayer technology is DuPont's original invention, directed by laser heating Donor film layer, the Donor film layer off and transferred onto the pigment layer on the substrate, to thereby obtain the desired color resist. DuPont currently has a device capable of producing G 8.
This method does not need exposure, developing, simple process, equipment space can also be a great savings. But is not yet prepared BM, and the time required for scanning the laser more than the exposure time of the pigment dispersion method.
Reverse printing method
Preparation of CF reverse printing is 2003 Japanese light village Printing and issued jointly by Mitsubishi Heavy Industries. In 2004, Toppan Printing has made use of reverse printing developed seven generations of CF related technologies. Their process is divided into three steps: the first step, the photoresist coated on the transfer drum; Second, the transfer roller in a special area on the template scrape excess photoresist; third step will be the first the second step of the patterned photoresist to the substrate by means of a transfer roller.
This method has the advantage of simultaneously R, G, B, BM resist four kinds of production, and does not require exposure and development device. However, in the large-size transfer, necessary to further improve the accuracy, and can not be VA, IPS technology applications.
Ink-jet printing method
Ink-jet printing method is the most mature of several new process method, developed by the Dai Nippon Printing. The technology BM first patterned on a glass substrate, the R, G, B three color resist aside separate space, and then by the inkjet print head, the color photoresist spray paint to the desired position, the final curing molding. 256x64 oled
The method is simple, photoresist is almost 100% efficiency, but need BM prepared by conventional methods, and higher on the ink.

Color filter manufacturing process and development TFT Display Module

With the rapid development of color display, LCD color of irreversible. By 2010, LCD colorization ratio will reach 94%. A color filter (color filter, referred CF) for the LCD to achieve color display key components, the performance (mainly opening ratio, color purity, color) directly affect the liquid crystal panel color reduction, brightness, contrast. The color filters also accounted for the cost of the LCD panel 25% of the total cost. lcm module
The basic structure of the color filter is mainly a glass substrate, BM (black matrix), a color resist, a protective layer (OC), ITO, spacer. The conventional color filter manufacturing process mainly staining (Dyeing Method), the pigment dispersion (Pigment Dispersed Method), electrodeposition (Electro Deposition Method), printing (Printing Method), in which the pigment dispersion based method. At present, many companies have developed a number of practical value of the new method of production applications, especially in large-size color filter production, such as DuPont thermal multilayer technology (Thermal multi-layer tech.), Toppan Printing (Toppan ) of reverse printing method (Reverse printing method) and Dai Nippon Printing (DNP) inkjet printing method (Ink Jet printing). Among them, the Dai Nippon Printing has over its six-generation line of ink-jet printing method used. Further, according to the structure design, a new type of color filter and COA type transflective type.
Conventional color filter manufacturing method
Staining using a dye as a coloring agent, gelatin, or acrylic resin used as the resin material. Their process are coated, exposed and developed, stained cured using this process has been the BM patterned on a glass substrate prepared separately three times R, G, B three-color resist. CF staining method were cheap, colorful, high transmittance, but the heat and light of the poor, is not suitable for high-end LCD. Electrodeposition method is mainly a polyester resin, a pigment as a coloring agent. Electrodeposition first obtained by exposure and development patterned ITO, and were deposited on the ITO R, G, B three color resist, and then by coating, exposure, developing obtain BM. Prepared by electrodeposition color lithography resist just once, but the cost is not an advantage. Pigment in the pigment dispersion method as a coloring agent, a resin acrylic. The main process of coating, exposure, development, preparation R, G, B three color resist the process involves the following three. The pigment dispersion process is relatively simple, good weather resistance, the current majority of small and medium size color filter using this method. The resin is an epoxy resin printing method, a pigment as a coloring agent. The main process roller paint adhesion, printing, the BM has been patterned on a glass substrate to obtain a color resist. Printed legal process is simple, but the accuracy is not high. serial 20x2 lcd
In addition to the four methods described above, there are dispersion dyes, pigments etching, but are due to process complexity, high cost, is rarely used.

Quartz component applications TFT Display Module

Quartz component has generated frequency, control the clock and noise filtering function, its scope of application covers communications, information, consumer, industrial, military, medical and other fields, of which the most widely used field of communications, but also the fastest growing, Its products include mobile phones, network equipment, base stations, etc., but as the largest mobile phone applications. By Japanese quartz Industry Association statistics can be found in recent years, demand for quartz element growth rate is greater than the number of mobile phone shipments growing number of reasons for that is that when the phone increases the more versatile, each demand for mobile phones is often worse than ordinary quartz component type of aircraft types and more than a few pieces. lcd modules

In mobile communications, the radio frequency (RF), baseband (Baseband) and application processors each require a quartz components, namely, providing MHz range of voltage control - temperature compensated crystal oscillator (VC-TCXO), RTC module The quartz crystal oscillators KHz Level, GPS end of the temperature compensated crystal oscillator (TCXO), and other functions for a processor to handle the quartz crystal (Crystal). As for camera modules, multimedia playback capabilities, Bluetooth, Wi-Fi, RFID, USB, mobile TV and other functions, also need to configure at least one quartz crystal. In addition, the current popularity of camera module itself also need to configure the optical low-pass filter, so quartz component usage is quite large. Of course, the mobile phone companies can also benefit from multi-clock generator and other ways to reduce single phone quartz component usage.

 In the field of information and consumer, the number and value of quartz components are steadily growing, because including netbooks, game consoles, digital TVs, digital cameras and other market continues to expand, the demand for quartz components also will increase in the future with considerable growth potential. Another noteworthy market is the automotive electronics, covered the car with a remote system, electronic toll collection system, TPMS, airbags, temperature control, as well as a variety of security detection devices, etc., are required to use varying amounts of quartz components . In the trend of automobile electronic control, the market growth rate is very fast, is second only to the communications market sources quartz component requirements. graphic lcd display module 

Since the surface of the world's first quartz since the quartz element in people's lives play an important role in more than half a century, its function in addition to the reference frequency and timing function, can also provide sensing and optical critical functions. It also makes it increasingly wide range of applications, including communications, information, consumer and automotive electronics markets are in a steadily growing. At the same time, miniaturization and high-frequency applications, forcing manufacturing quartz crystals from the traditional cutting polishing process steering MEMS process.

Correct Character LCD Modules TV screen surface dirt removal method

LCD TVs LCD screen is a core part of our clean naturally focus. OLED Display cover glass surface. If you find that the LCD monitor surface dirt, you should use the correct method to remove dirt.
Stains liquid crystal panel divided into two, one is sticky because of the cumulative dust remaining in the air, one is a user inadvertently left fingerprints and oil. LCD screen you want to remove the dirt, it is best to use a medium soft, non-fibrous materials, such as cotton, lens tissue or a soft cloth, lightly dampened with glass cleaner and gently wipe (wipe intensity to light Otherwise, the screen will thus short-circuit damage), prohibit the use of alcohol, a class of chemical solution, do not use a towel to scrub hard surface of the screen, so as not to affect the surface of the screen wipe raising display, also can not use a rough cloth or paper goods because such substances prone to scratches.
Here to remind everyone, do not spray cleaner directly onto the screen surface, it is easy to flow inside the screen causes a short circuit inside the LCD screen failure, resulting in unnecessary losses. Clean the screen but also regular meals, frequent scrubbing is not right, that same television screen will cause some adverse effects.
Eliminate some bad habits
When you are not watching TV, turn off the color lcd display module screen (not limited to the closed state of the remote control) to prevent dust accumulation; Do not use your fingertips (often hand pointing to the screen) or sharp objects on the surface of the LCD slide so as not to scratch the surface.

Character LCD Modules TV works

LCD TV works:
LCD TVs are backlit (backlight) principle, the use of the lamp as a backlight source, through the auxiliary optical module and the control of the liquid crystal layer of light to achieve ideal display. Liquid crystal is a regular arrangement of the organic compound, which is a range between the solid and liquid substances is generally used at present the most suitable for the manufacture of the molecular arrangement of the nematic liquid crystal displays fine columnar crystal. Crystal structure itself does not emit light, it is mainly because the voltage changes by leaving the liquid crystal in an electric field produce changes to display images. OLED Display
LCD screen material:
LCD panel mainly by two sodium-glass sandwich a polarizing plate, a liquid crystal layer and color considered a laminated sheet having a light formed. LCD screen, seemingly a solid black screen, in fact, this layer of the screen manufacturers will add a special coating. This layer of special coating The main function is to prevent the user when used by other light sources and reflective glare, while strengthening its own color LCD screen contrast.
But because the manufacturers are using this layer of coating material are not the same, of course, its degree of durability will therefore vary. So the user during cleaning, do not use any alkaline solution or random chemical solution wipe the screen surface. serial display modules

Active shutter 3D technology oled module which advantages and disadvantages?

As a high-end 3D display technology, active shutter 3D with less blur, 3D effect is outstanding advantages, but the technology is easier to achieve, the screen lower cost, whether it is television, computer screen or projector, as long as the update frequency can meet the requirements, you can import the technology, now available in most of the upcoming 3D products basically using this technique.
However, active shutter 3D technology also has significant deficiencies, according to some viewed active shutter 3D glasses users complained that prolonged viewing is likely to cause eye fatigue, intermittent changes due to different time frames and the human individual differences glasses of fatigue and brain fatigue speed is different, the most serious prolonged viewing may lead to vomiting and other phenomena. Moreover, because of the frequency of fluorescent and other light-emitting devices with 3D glasses open and close at different frequencies, lighting equipment for viewing 3D images influence. COG LCD Display
In addition, the active shutter glasses 3D technology worn very expensive on the market this active shutter 3D glasses, the basic price of 1,000 yuan or more, and the launch of various manufacturers and can not be universal 3D glasses, 3D glasses either signal receiver, or both are to be flashing LCD consumes electricity, therefore, active shutter glasses also from time to time charge, giving users a lot of trouble. Character LCD Modules

led backlight technology produces background TFT Display Module

LED backlighting as a high-end technology, energy saving and environmental protection, energy consumption, etc., have been widely applied to decorative lighting and other fields. custom lcd module
The current global energy shortage concerns rise again in the context of energy conservation is an important issue facing the future, in the lighting field, LED light-emitting products are attracting the world's attention, LED as a new type of green lighting products, energy saving, environmental protection, long life, small size and other characteristics, can be widely applied in various directions, display, decoration, backlight, general lighting and urban landscape and other fields, is the future trend of development. Using LED as the light source is due to the traditional LCD display device CCFL (Cold Cathode Fluorescent Lamps, cold cathode fluorescent lamp) backlight technology and products exist coloring domain stenosis, low energy efficiency of their high power consumption and short life expectancy, etc. some deficiencies, it has been Looking forward to its alternative technologies and products, and in the process, LED backlight technology products will be incorporated into the people's choice category.
Although the LED backlight technology has many advantages, but power consumption is still the problem of LED backlight modules must overcome an important issue. As a result of many of the LED, in addition to increased power consumption, but also cause the temperature rise of the problem, so must also increase the cooling system and sensors to solve this problem, so the early LED backlight products appear more in thickness with CCFL backlight products more thick, but through constant technological improvements, now the thinnest backlight can reach 1.99 cm, the future will be even thinner, more fashionable appearance. color lcd display module

TFT Display Module base

 Before 1990, the growth of the LED display formative years. On the one hand, by limiting devices LED materials, LED display applications without extensive expansion, on the other hand, the display control technology is basically a communication control method, objectively affected the display. During this period of the LED display used widely in foreign and domestic few products with red, green, two-color main control mode is communication control, gray scale as a single point of four tone gray, relatively high cost of the product. Low Temperature Display
1990-1995, this stage is a period of rapid development of the LED display. Into the nineties, the global information industry growth, continue to make breakthroughs in various fields of information technology, LED display and control technology in LED materials are also emerging new results. Successful development of blue LED chip, full-color LED display to enter the market; computer and microelectronics technology development in the field of display control technology for video control technology to achieve 16 gray scale display grayscale and 64 gray-tone gray, the display shows the dynamic effect of greatly improved. This stage, LED display in China's development speed very quickly, from the initial few empty enterprises, the annual output value of tens of millions into the development of dozens of enterprises, the annual output value of several hundred million dollars, the product application areas including finance and securities, sports, airports , railway stations, road transport, commercial advertising, Posts and Telecommunications, and many other fields, in particular in 1993 Equity securities industry but also led to substantial growth in the LED display market. LED display flat panel display situation basically formed the mainstream products, LED display industry into a new high-tech industries.
Since 1995, LED display's development has entered a steady improvement of the overall industrial structure adjustment and improvement of the period. Since 1995, LED display industry, internal competition, the formation of many small and medium enterprises, product prices fell sharply, a broader application areas, product quality, standardization of other aspects of a series of new problems, the relevant departments on the LED display attach importance to the development and conduct of appropriate standards and guidance, the current work in this area is gradually deepened. custom lcd module

The obvious drawback of edge-lit LED oled module

1, since the matrix the backlight in claim block must have precise control backlighting, generally speaking, the design of the circuit corresponding complex; addition, select, as well as some of the control chip of the LED chip can also cause an increase in cost. Lcd display module 
In the assembly, the matrix backlight accordingly, the complexity of the process is much higher than the direct type and side-in. Therefore, the assembly yield, cost is also constrained its a major factor.
Matrix backlight compared to traditional direct type backlight, local dimming accuracy in the current view will be higher than the direct type, due to the direct type the next diffuser plate has been dodging occur, and the matrix is ​​the next diffusion film piece dodging influence between adjacent partition needs to be less than the direct type, finer control of the contrast. However, due to its partition was less affected each other, when in the event of a regional block damage to the LED, the optical effect of defects than the direct type looks significantly a lot. In addition, the thickness thereof is extremely obvious advantages. However, due to a partition of the matrix are relatively independent of one side into the backlight, the complexity of its institutions is much higher. At present, a lot of direct type on the the partition local control light through an area some LED light control, the matrix must be controlled for each sub-block, so that the circuit is correspondingly more complex.
Matrix side into to solve the local control light and Energy Smart greatly enhance picture contrast, relatively simple than thermal design; side into the light guide backlight distance below, the optical efficiency will be higher than the side-in, fully able to do in thickness comparable with the side into the backlight. The only side into the backlight or insufficient compared to the above-mentioned cost and manufacturing complexity. The the normal one light guide plate need to achieve through hundreds of partitions, means that its number of parts and assembly complexity correspondingly improved hundreds of times, due backlight Component is related to an assembly process, the defect rate I believe that is also a big problem. 240x64 lcd module

Phosphor converted white LEDs TFT Display Module

(1) two-color phosphor converted white LEDs
The two-color white LED is made of blue LED chip and YAG phosphor. Ships using the blue-chip InGaN chip, the other can also be used AlInGaN Circuit. The blue chip LED with YAG phosphor advantages: simple structure, low cost, the production process is relatively simple, but the method also has several drawbacks, such as the blue LED efficiency is not high enough, resulting in low efficiency of white LED; phosphor itself The energy loss; phosphor and packaging materials aging over time, leading to a color temperature drift, and shortened life expectancy. QVGA lcd display
(2) three-color phosphor converted LED
Trichromatic phosphor LED under the premise of high luminous efficiency effectively improve the color rendering of the LED. Trichromatic white LED of the most commonly used approach is the use of UV LED excitation trichromatic phosphor can be effectively excited by ultraviolet radiation.
With respect to Blu-ray LED + YAG phosphor to obtain white light using a UV-LED + trichromatic phosphors method is easier to obtain uniform white color, it is because the light color of the LED is simply determined by the ratio of phosphor. In addition, this type of white LED with high color rendering, light color and color temperature can be adjusted using the high conversion efficiency of the phosphor can improve LED light effect.
However, UV LED + trichromatic phosphor some defects, such as phosphor conversion ultraviolet radiation less efficient; powder mixing is more difficult; packaging materials under UV irradiation easy to aging, such as short-lived. And higher conversion efficiency red and green phosphors for sulfide system, poor stability of such light-emitting phosphors, the light fades larger. graphic lcd display module 

Plasma TVs and Character LCD Modules TVs on the difference of perspective

Plasma TV in the viewing angle is better than LCD TVs, but for the living room, bedroom with TV, few people will be more than 120 degrees to watch TV. About the response speed, response time LCD TVs majority of 12 milliseconds, slower than plasma TVs. For a fast-moving images or black white image, LCD TV has a slight smearing, but this does not mean that, for the fast-moving white object, plasma TVs also have mild tailing phenomenon, but when the fast-moving objects into the black, there will be no smearing occurs. TFT Display Module

Plasma TV and LCD TV distinction: LCD TV has a clear picture, but higher brightness, response time is too high, can easily form a tailing phenomenon is likely to cause visual fatigue. Plasma TVs have a clear picture, motion picture imaging effects, brightness and soft, good color reproduction and other characteristics, can reduce the TV screen on the stimulation of the retina, which greatly reduce eye fatigue.

Now, however, a plasma TV and LCD TV technology are in progress, such as the current plasma screen resolution 1366 * 768 mostly, and some have reached 1920 * 1080; to prevent screen burn, using pixel mobile technology. The LCD TV in order to reduce tailing using multiplier techniques. OLED Display

IPS hard screen become consumer heart love TFT Display Module

IPS (In-Plane Switching, plane switching) hard screen technology is currently the world's most advanced LCD panel technology. IPS hard screen is unique in that not pre-orientation of liquid crystal molecules to become transparent mode, but become opaque directional pattern, how much light through the liquid crystal molecular orientation direction perpendicular to the electrode decision, the higher the voltage, reversing the molecule is more, in order to achieve precise control of light. Only the control of a deflection angle IPS LCD panel, and the deflection of the number of molecules proportional to the voltage close to the level of the panel control is more easily achieved. In order to widen the viewing angle, the liquid crystal molecules of the basic module is V-shaped, and the liquid crystal molecules perpendicular to the panel, the light within the panel is easy to control, and therefore less light leakage situation. In the moving picture, it is able to perform better, to achieve better contrast. OLED Display
Hard screen is attached to the surface with a layer of resin film, as a man bespectacled same. IPS hard screen molecular arrangement is horizontal. When faced with external pressure, the molecular structure down slightly depressed, but the overall molecule also is horizontal. While the soft screen vertically aligned liquid crystal-like, then sag badly, and was down eight shape. Visible, in the face of external forces, hard-screen LCD molecular structural soundness and stability of the far superior soft screen, basically intact unchanged. In kind, the hard screen touch screen directly, no flickering, and soft screen screen appeared a large area distinct flash area, but also what we called waterlines phenomenon. IPS hard screen followed by molecular recovery faster, thus solving the soft screen when struck inevitable "blur" flawed.
As IPS hard screen has so many advantages, so now it is also used in the majority of relatively high-end monitors. However, with the rapid development of VIS monitor, large screen display has become mainstream, consumers will eventually be transferred to the eyes from the large display quality, IPS hard screen will be the future development of large-screen LCD monitor direction, I believe With some local vendors to follow up, IPS hard screen monitor prices will be reduced to a reasonable range, eventually become consumers' heart love. " Low Temperature Display

Stand on the impact of white Character LCD Modules light failure

LED stent mainly copper and iron bracket bracket. Thermal conductivity of copper bracket, good conductivity, high price. The iron frame thermal conductivity performance is relatively poor, more likely to rust, but the price is cheap. LED on the market most of the use of iron bracket. The stents of different materials have different effects LED performance, especially decay of light is particularly prominent. This is mainly due to thermal conductivity of copper is much better than iron, copper thermal conductivity of 398W (mk), and the thermal conductivity of iron is only 50W (mk) or so, only the former is 1/8, as well as the stent plating thickness also closely related. In the selection of stand, but also pay attention to whether the size of the stent bowl cup mold with light-emitting chip and grain matching, the matching quality will directly affect the white LED optical effect, or likely to cause asymmetric beam shape, yellow circles, as well as spots, etc., directly affect the quality of the product. mini lcd module
With white LED lighting applications, customer demand is also rising, we must continue to innovate and enhance the performance of our products to improve our processes, as far as possible to meet customer needs. To make the high-performance white LED products, materials selection and the best match is a direct impact on the quality of the white LED attenuation and, therefore, a good mix of materials plus the best, along with some of the manufacturing process with Lei Mante technology is the key to good white. Lehman people, we must give full play to their advantages, continue efforts to increase investment in research to develop more suitable for customer requirements for the country's semiconductor lighting energy industry to contribute. lcd module 

Phosphor and the impact of the led fluorescent glue Character LCD Modules

Phosphor for white LED light failure impact
White LED to achieve a variety of ways, and is currently the most widely used one is the most mature in the blue chip on the smear layer of yellow phosphor, the blue and yellow mixed into white, so white LED phosphor material on the attenuation influence. Most mainstream market YAG phosphor is yttrium aluminum garnet phosphors, phosphor silicate nitride phosphor, compared with the blue LED chip white LED phosphor has the role of accelerated aging, and different manufacturers phosphor light failure is not the same degree of influence, which is closely related to the phosphor raw ingredients. Lehman photoelectric choose the best material white phosphor, so make white LED compared to peers in the attenuation control has been greatly improved. lcd module 

Fluorescent glue on the impact of white LED light failure
Traditional packaged white LED, fluorescent plastic commonly used epoxy or silicone, after the light fades experimental results obtained with silica powder with white LED life is significantly longer than the epoxy. One reason is to use the above two methods into a finished packaged LED, UV-resistant silicone resin ratio and the strong cooling effect than the silicone resin is good; but under the same conditions, with the initial brightness of silica than with epoxy powder resin with powder to be low, the most important is the refractive index of silica gel (1.3-1.4) than the epoxy resin (1.5) is low, so the initial high light efficiency is less than epoxy. lcm module

White Character LCD Modules attenuation and its Material Analysis

The advent of the blue LED, the use of phosphor and blue LED combination, you can easily obtain white light LED, which is the industry's most mature and a white package. Currently white LED lighting has become the general household lighting has become a reality. But in the course of more white products attenuation, not suitable for the lighting market, Lehman photoelectric lighting for the high-end market demand, increase the development of white light by changing the packaging technology and materials with low attenuation white products developed for LED lighting industry to do a little modest. The following is the author summed up during the packaging process five-point experience, industry colleagues to exchange with you, in order for the white LED packaging technology to enhance the building blocks. Lcd display module
A wafer on the impact of white LED light failure
The experimental results from the current point of view, the impact of bad light wafer is divided into two categories:
The first is the chip lead to attenuation of different materials are different, the most commonly used material for silicon carbide wafer substrate blue and sapphire, silicon carbide general structure designed as a single electrode, the heat better, sapphire general design for the two-electrode, the heat is more difficult export, thermal effect is poor;
The second size of the wafer, the wafer material is the same, different size and different attenuation gap.
Second, solid crystal primer pairs of white LED light failure
In the white LED packaging industry commonly used solid crystal plastic insulated with epoxy glue, silicone insulation, silver plastic. Three advantages and disadvantages, to be taken into account in the selection. Poor thermal conductivity of the insulating epoxy glue, but high brightness; silicone rubber thermal insulation effect is slightly better than the epoxy resin, high brightness, but due to the silicon component accounted for a certain proportion of the residual solid wafer side silicone gel in the ring with a fluorescent epoxy resin compartment when combined will produce the phenomenon, after thermal shock will result in death peeling lights; silver plastic thermal conductivity than the first two are good, you can prolong the life of the LED chip, but the silver plastic light absorption compared large, resulting in low brightness. For blue-chip dual-electrode in solid crystal with silver glue, the right to control the amount of glue is also very strict, otherwise easily lead to a short circuit, a direct impact on product yield. lcd graphic display modules 

Character LCD Modules TV, plasma TV display principle display principle

For LCD TV works, you must first understand what a special liquid crystal material. Liquid crystal is a regular arrangement of the organic compound, which is a range between the solid and liquid substances is generally used at present the most suitable for the manufacture of the molecular arrangement of the nematic liquid crystal displays fine columnar crystal. The important characteristic of liquid crystal in different directions different from the light transmission. The liquid crystal itself does not emit light, LCD TV backlight (backlight) principle, the use as a backlight source lamp, columnar liquid crystal molecules using different transmission characteristics of different directions, the liquid crystal molecules by changing the electric field around the liquid crystal molecules are arranged leaving a difference , thus changing the light through, similar to that for the backlight through a door opened, in order to control the light projected by simply changing the voltage value to stimulate the LCD can control the final appearance of the light intensity and color, and then control the screen display results. Liquid crystal display device complex structure for plasma devices. LCD panel mainly by two sodium-glass sandwich a polarizing plate, a liquid crystal layer and color considered a laminated sheet having a light formed. LCD screen coating fear alkaline solution or chemical solution wipe. lcd modules
Popularity of LCD TVs is much faster than plasma TVs, this is not due to the technical characteristics of the liquid crystal on the overall leader, is due more to the lack of plasma. In the application of resolution and screen size LCD TVs mainstream comprehensive beyond, far higher than the plasma relative to other advantages of LCD TVs. Currently 40 inches below the flat-panel TV products using LCD technology, but also in the large size LCD and plasma have been able to have equal shares. Through years of technological advances in uniformity, viewing angle, response time and even the color performance LCD unit has been demonstrated by the trend to catch up with the plasma. Therefore, the current production of LCD TVs better than plasma products. graphic lcd display module 

Disadvantages of Character LCD Modules TV inventory

1, the reaction rate is displayed on the monitor as the traditional technical advantages, the reaction rate is very good. TFT LCD display characteristics due, not how optimistic (low temperature does not work, and there is reaction time). LCD response time is relatively long, so the moving image's performance is not satisfactory.TFT LCD Module
2, the display quality: the traditional display of the display screen with the phosphor, by electron beam against the phosphor and the display, which shows the brightness of the light transmittance ratio of the liquid crystal display (in fluorescent lamp as the light source) is brighter. In theory only when the LCD display 18 colors (approximately 262,144 colors), but the CRT color depth is almost infinite.
3, LCD viewing angle relative to CRT monitor is relatively small.
4, LCD display relatively fragile and vulnerable to damage. This improves the use and maintenance of LCD TVs difficulty.
5, since the liquid crystal is a range of solid and liquid, with the regular arrangement of organic molecules. At different current electric field, the liquid crystal molecules are arranged rotated 90 degrees to make the rules, resulting in differences in light transmission, so the power ON / OFF difference arising under shade, so the principle control each pixel, can form the desired image . LCD TV is made use of this principle. But precisely because of this principle, all LCD TVs in the process is difficult to expand, and the price is expensive.
6, the current LCD manufacturing process determines the presence of point defects, its manufacturing yield is relatively low, which to some extent increase the LCD manufacturing costs. So the price is the biggest obstacle to the promotion of LCD troubled, sometimes a good 17 "LCD asking price will be more than 20,000 yuan, which is a CRT, but a superb 21" flat monitor prices. Most domestic and foreign TV makers believe that: the next few years, the more popular high-definition TVs and rear projection TV will gradually be replaced by LCD TVs. In the technical content, LCD TVs have adopted the basic progressive scan, 4H digital comb filter, DVD component terminals, more than 16.7 million kinds of color phenomena. Currently, both domestic and international not have a complete specification for Low Temperature Display products, which also resulted in LCD products currently on the market there is no uniform standard problems, allowing users to select LCD products prone to doubt, and even misled .

The production system features TFT Display Module technology

Production System Features

1, the computer produced, functional software Zhuo open design, compatible with international graphics / image standards, with powerful editing capabilities. Generated text ads, 3D animation, can directly generate proofs, dramatically poster or color negative film, can be automatically played on the LED electronic screen, the special effects production with large screen display combine to provide users with a powerful design, production, broadcast platform. Can play a variety of authoring software generated programs, such as: TIF, TAG, FLI, FLC, AVI, JPEG and so on. color lcd display module

2, the system is equipped with ad-supported software includes: ANI animation package; 3DS dimensional animation package; WINDOWS98/WINDOWS2000/WINDOWSXP Chinese system fonts include Arial, italics, italics, boldface; hollow containing various fonts, italics, standard, flat body, long body and other glyphs; via the keyboard and mouse to zoom, delete, modify, and other editing functions. TFT Display Module

3D TFT Display Module technology

Principle of inspections baffle France

Inspection method is the surface of the screen bezel set called "parallax barrier" fence-like longitudinal optical barrier to control the direction of travel of light, so that about two receiving different images to achieve stereoscopic display parallax effect, parallax cover screen is black on transparent white straight stripes, will be placed from a short distance away from the LCD panel, so that viewers can see the LCD panel in which an odd number of images, the viewer can only see the other eye even screen LCD panel. COG LCD Display

Principle of the lens array method

Lens array method before the display panel is bordered by a cylindrical lens plates naked eye three-dimensional display of the optical system, the pixel of the light refracted by the cylindrical lenses, the parallax image is projected to the human left eye, the optic center of the obtained three-dimensional integration three-dimensional. By a slender cylindrical lens plate semi-cylindrical lens closely packed structure, the following figure shows the principle of the method cylindrical lens. Views are located around the column of each even-odd columns of pixels to form a view of the partition.

Micro-lens image projected onto the projection is formed by the micro-lenses on the display, after a micro-lens refraction difference to achieve stereoscopic imaging.

Micro phase difference plate method and the principle of special lighting method: Micro retardation plate method is Taiwan's success as a postgraduate research photoelectric naked eye stereoscopic display technology. Phase difference plate with micro-polarization light is changed to achieve a state of the left and right view of the separation. Micro phase difference plate stereoscopic displays do not wear glasses, but perspective is very small, and head tracking device to be used in conjunction. Graphic LCD Display
Special lighting method is a linear light source illumination method of stereoscopic display on the LCD pixel layer using a series of parallel linear light source to the pixel columns provide backlighting, the line width of the light source and with the LCD screen extremely small columns of pixels in parallel. Dense line illumination to odd and even columns of pixels of the image transmission path of separation, so that the left and right eye images corresponding.

3D technology has advantages and disadvantages oled module

3D technology as a new technology, also has advantages and disadvantages, advantages vivid display technology, with immersive feeling, 3D movies can be copy-protected, with its unique, and it is the only way for the development of high-definition . OLED Display

Disadvantage is the display technology to be unified, 3D content production deficiency, terminal display device cost price is too high, requiring high image resolution, in addition to some of the products still need to wear glasses, the user prone to vertigo prolonged viewing. 3D display technology from the present viewpoint, is a disadvantage than advantage will, but as a new thing, 3D display technology is a trend, there are more inadequate description there is a large room for improvement, and its future development, we will wait and see. Low Temperature Display

Production of flat panel display glass substrate under the lead of France and his ilk Kong oled module

It required a special ultra-thin flat panel display glass, there are many companies that use streaming technology to produce holes under the cited law, the law is based on low-viscosity homogeneous glass paste made of imported platinum alloy leakage orifice plate (Slot Bushing) tank, gravity and pull forces and die openings to control the size of the thickness of the glass, where the temperature and the size of the orifice opening glass production joint decision, and the orifice opening size and speed of the common arguments under decided to glass thickness, temperature distribution is determined warping glass display. OLED modules

Under the lead of Processing orifice daily can produce a thickness of 5 to 20 tonnes 0.0 3 ~ 1.1 mm of the thin plate glass, because the platinum metal can not withstand the high mechanical stresses, it is generally made of a platinum alloy used most of the mold, However, when an external force to bear its orifice often deformed, resulting in non-uniform thickness and surface flatness can not meet the specification requirements for its shortcomings.

Down-draw method orifice must be in the vertical direction, annealing, if it is turned in the horizontal direction may increase the glass surface in contact with the rollers and cause warpage generated horizontal transport, leading to adverse rate increase. Such concerns must be constructed so that the furnace ceiling design, and must consider the precise height required for annealing, making the project a substantial increase the difficulty, and also reflected in the construction costs. 20x2 oled

What is LGP TFT Display Module

LGP is the use of optical-grade acrylic / PC sheet, and then with a high reflectivity without absorption of high-tech materials, optical-grade acrylic sheet at the bottom of screen printing technology with UV light guide printed on the spot. The use of optical grade acrylic sheet to absorb light emitted from the light in optical grade acrylic sheet surface of the residence, when the light shines a light guide each point, the reflected light will be diffused to all angles, and then destroyed by the light guide reflection conditions positive injection. Through a variety of density and sizes of the light guide point, make uniform light guide plate. In that the purpose of reflecting sheet exposed at the bottom of the light reflected back to the light guide plate, to improve the use efficiency of light. Character LCD Module
LGP design principles from the laptop LCD screen is the linear light source into surface light source of high-tech products. Optical grade acrylic (PMMA) / PC as the substrate, and the use of laptop LCD screen backlight technology, through the high points of light guide light conductivity, the computer-to-point calculation of the light guide, the light guide plate light source are refracted into the surface state manufacturing molding. Products using spectral theory and digital UV printing technology combining and constant temperature and humidity, dust-free environment conditions produced. Has a thin, bright, optical uniformity, energy saving, environmental protection, no dark areas, durable, easy to yellowing, quick and easy installation and maintenance and other distinctive characteristics. low temperature lcd

Production of flat panel display glass substrate melting overflow oled module

 System using a long bar melt pump (Fusion Pump), the molten glass paste transported to the center of the melt pump, and then use the overflow way, the two stocks out of overflow glass paste on the pump at the bottom and then combined into a thin sheet glass. lcd graphic display

With this mold molding technology also need to draw on, and thus also faces melt pump mold deformation due to mechanical stress, melt pump to maintain the level of degree, and how stable the molten glass into molten cream pump in question. Because the use of overflow fusion method of molding technology made into a super-flat glass, the thickness of the glass surface is determined by the quality of transport to the molten glass paste volume pump, stability, level of degree, the surface properties of the pump and glass leads to volume.

Melt overflow technique can produce double the original glass surface with ultra-thin glass substrate, compared to float method (only outputs a single original glass surface) and down-flow orifice (not output the original glass surface), eliminates the grinding or polishing processes such as post-processing, while the flat panel display manufacturing process, nor do they need to pay attention, both the original and in contact with the liquid tin different glass surface, or the contact and the grinding media have caused differences in the surface properties of glass and so on, has become a mainstream thin flat glass molding.
Since E-glass has a special ingredient in the formulation and thermal stability, mechanical, electrical, optical, chemical and other characteristics and appearance of size, surface roughness, and other aspects very strict standards, so the production line adjustment, learning a long time, To join the new party industry technical threshold is high. custom lcd module

Classification of the light guide plate oled module

Generally due to the shape of the light guide plate, production methods and functions and have different classifications and sub-law is currently no uniform, after finishing
A, in accordance with the shape into: flat and wedge plate (ramp)
Tablet: into the light guide plate from the point of view of a rectangular office. OLED Module
Wedge plate: From the point of view of one side into the light side as thin as a thick wedge (triangular) shape.
B, in accordance with the dot production methods: printing and non-printing style
Printed: the light guide plate after completion of shape processing in printing the dot printed on the reflective surface, and IR and UV into two kinds.
Non-print style: light guide plate forming the network formed directly on the reflective surface. Divided into chemical etching (Etching), precision machinery characterization method (V-cut), optical lithography (Stamper), internal diffusion.
C, in accordance into the light: side into the light (lamps and LED) and direct type.
Side-light type: the light (lamp or LED) placed on the side of the light guide plate.
Direct type: the light (lamp or LED) placed at the bottom of the light guide plate.
D, in accordance with the molding production methods: injection molding and cut molding.
Injection molding: injection molding machine application of optical grade PMMA particles using high-temperature, high-pressure coolant injection mold forming.
Cutting Forming: The optical grade PMMA cutting process is completed after the original board finished. I2C Lcd Module

Character LCD Modules backlight problems now

LED backlight technology is like many new technologies have many attractive advantages, but in order to occupy the large-size COG LCD Display LED backlight mainstream, there is need to resolve some technical difficulties. By comparison of Table 1, we have found a disadvantage in power LED, in addition to the high cost, and poor consistency.

1) LED luminous efficiency is low, with the same size compared to CCFL backlight power consumption is high. The output current CCFL more in 5000 ~ 7000lm luminous flux range is higher than the actual screen output luminous flux 300lm, LED backlighting and most are still unable to reach this target. Now, however, a large number of enterprises engaged in global research, LED luminous efficiency quite fast, highlighting the current flux reaches 10000lm type LED backlight has also emerged, I believe that is only a stone's throw away from maturity.

2) high cost, expensive, the same size of the backlight, LED four times the price of a CCFL. For the current price competitive market, so that manufacturers some prohibitive. Only Sony to image quality regardless of cost. Of course, as the technology matures and the scale of production increases, LED backlight costs will gradually decline.

3) with the presence of white Character LCD Display as a backlight consistency problems, which is a disadvantage compared to CCFL.

4) LED in the network design than the linear light source CCFL difficult, consider LED light radiating strong attenuation.

5) RGB LED backlight Over time generated wavelength of color shift with temperature changes, resulting in different colors.

LED backlight technology and traditional CCFL backlight technology comparison TFT Display Module

LED backlight technology leadership
LED as the TFT LCD Misplays backlight, backlight technology compared with conventional, except in the color gamut of advantages, there are many unique advantages, grouped into ten areas:

1) LED backlight for better color gamut. Its color and strong performance in the CCFL backlight, the display color can be an insufficient number of LCD technology has played a good role to make up, color reproduction is good;

2) LED life of up to 100,000 hours. Even 10 hours of continuous use per day, you can spend 27 consecutive years, greatly extending the life of LCD TVs, plasma technology available on the overwhelming advantage;

3) Brightness adjustment range. LED power control is easy to achieve, unlike CCFL brightness of the existence of a minimum threshold. Therefore, whether outdoors or in bright black interior, the user easily adjust the brightness of the display device to the most pleasing to the eye of the state;

4) Perfect moving images. Traditional CCFL lamp flashing light frequency is low, the performance of dynamic scenes may generate screen beating. LED backlighting can flexibly adjust the luminous frequency, and the frequency is much higher than CCFL, thus perfectly rendered motion picture; Character LCD Modules

5) Real Color Management. Since RGB three-color light independently, it is easy to control the current display accurate color characteristics;

6) You can adjust the backlight white balance, while ensuring the overall contrast. When the user's computer and video source switching between DVD player, you can easily adjust the white balance between 9600K and 6500K, but without sacrificing brightness and contrast;

7) for large-size screen provides continuous planar array light source. LED is a planar light source, the light emitting unit is a basic side length of 3 ~ 5mm square package, together very easily become an established area of ​​the surface light source, with good brightness uniformity, if the backlight of a liquid crystal TV source, the auxiliary optical components can be done very simply, the screen brightness uniformity even better;

8) Safety. LED using a 5 ~ 24V low-voltage power supply, very safe, power module design is quite simple;

9) environmental protection. LED light source produces no radiation, no toxic substances like mercury, can be described as green light;

10) earthquake. Planar structure of the LED has a solid internal structure, seismic performance is excellent.

Splicing unit thin, lightweight Character LCD Modules liquid crystal mosaic

LCD full name in English LiquidCrystalDisplay, TFT Display Module is the structure of two parallel glass in which the liquid crystal placed, the middle two pieces of glass with many tiny vertical and horizontal wires, or to control rod through the energized crystal molecules change direction, reflecting the light generated screen.
LCD consists of two glass composition, thickness of 1mm, during which the liquid crystal material contains 5 m evenly spaced intervals. Because the liquid crystal material itself is not light, so both sides of the screen with the lamp as a light source, and in the back there is a backlit LCD display panel (or even light panels) and reflective film, backlit panels are composed of a fluorescent substance can emit light, its main function is to provide a uniform background light.
Light emitted by the backlight passing through the polarizing filter layer after the first layer containing the liquid crystal droplets thousands crystal layer.
The droplets of the liquid crystal layer are included in the small cell structure, one or more cells constitute one pixel on the screen. Between the glass and the liquid crystal material is a transparent electrode, the electrode is divided into rows and columns, the intersection of row and column, the voltage is changed by changing the optical state of the liquid crystal, the liquid crystal material acts like a small light valve .
The liquid crystal material is the control circuit portion and a peripheral driving circuit portion. When the Low Temperature Display of the electrode generating an electric field, the liquid crystal molecules will be distorted, and thus will pass through one of the refraction of light in a regular, and then through the second layer of the filter layer filtering is displayed on the screen.
The LCD is only in recent years developed a splicing technology, its greatest advantage is its low power consumption, light weight, long life, no radiation, screen brightness uniformity, etc., but the biggest drawback is that LCD larger patchwork . Only a fraction of a millimeter and DLP patchwork is unable to compete. The display requires very sophisticated users, a little bit of regret, which is currently only occupy LCD splicing key factor in low-end market.
To reduce patchwork, patchwork gives users reduce the interval sense, LCD manufacturers have been stitching also constantly work with. Among the many manufacturers, Samsung is undoubtedly the most praiseworthy. In recent years, Samsung has introduced a more narrow patchwork LCD splicing unit, from the initial 7.3mm, to 6.7mm, and then in 2011 launched a new 5.5 mm LCD splicing unit, Samsung lead the way, and continue to regard the patchwork breakthrough, setting off a wave of LCD splicing again and again.

The most obvious technical advantages PDP plasma splicing oled module

PDP , PlasmaDisplayPanel abbreviation of the Chinese name for the plasma display panel. PDP is a gas discharge display technology, it works with fluorescent lamps is very similar. It uses a plasma tube as a light emitting element, a plasma screen, each tube corresponding to a pixel, the screen to the glass as the substrate, the substrate spaced from, surrounded by hermetic sealing by forming a discharge space. The discharge space filled with neon, xenon mixture of inert gas as the working medium. graphic oled module
In the inner surface of two glass substrates coated with a metal oxide conductive film as the excitation electrode. When added to the voltage on the electrodes, the discharge space of the mixed gas plasma discharge phenomenon will occur. Gas plasma discharge ultraviolet light, UV excitation screen, screen emit visible light, display the image.
When using the RGB phosphor coated screen, the screen UV excitation, the light emitted by the phosphor screen was red, green, and blue. When each unit to achieve 256 gray color after color mixing, they achieve color display.
From a technical principle, due PDP plasma screen glowing tubes are uniformly distributed in the plane, so that the center of the display image and edge exactly the same, does not appear distortions to achieve a true sense of the pure plane. In addition, as the process does not show electron beam motion, without aid of electromagnetic fields, electromagnetic fields outside so it will not interfere with them, and has good environmental adaptability.
Relative to the LCD technology is concerned, PDP splicing not only did it, the bigger the screen the image depth of field and higher fidelity, but it also avoids the LCD technology in the response time encountered problems, and the PDP patchwork than LCD splicing much smaller, although they can not reach DLP mosaic patchwork tenths of a millimeter, but the visual effect is almost non-interest can be omitted, and the PDP screen body is very thin. In simple terms that is, PDP splicing technology, LCD and DLP combines all the advantages of the two technologies, and also to overcome their shortcomings. 320x240 lcd module
Especially in recent years, plasma technology has overcome its own fatal flaw, "burn-in" phenomenon since, there have been more and more manufacturers began to enter the plasma market, completely out of time in the past few years, only a ORION manufacturers "alone" status, and showing a "contending" picture.

What is the ITO conductive film glass TFT Display Module

Indium tin oxide (Indium-Tin Oxide) transparent conductive film glass, ITO conductive film by multi-glass production line, in a highly purified factory environment, the use of a planar magnetron technology, thin glass films sputtered indium-tin oxide coating and obtained by high temperature annealing of high-tech products. 128x64 oled
ITO indium tin oxide as nano has good conductivity and transparency, can cut off harmful electronic radiation, ultraviolet and far infrared. Therefore, sprayed on glass, plastic and electronic display after enhanced conductivity and transparency while cutting harmful electronic radiation and ultraviolet and infrared.
ITO conductive glass is soda lime borosilicate alkyl group or on the basis of glass, coated by magnetron sputtering a layer of indium tin oxide (commonly called ITO) film is processed into the production. Resolutions ITO conductive glass, also in the ITO coating layer, coated with a layer of silicon dioxide barrier layer on the glass substrate to prevent sodium ion diffusion in the liquid crystal inside the box. Special grade LCD ITO glass substrate before sputtering ITO layer should be polished glass, in order to obtain a more uniform display control. ITO glass substrate, liquid crystal displays are generally dedicated ultra float glass, all of the coated surface of the float glass surface. Therefore, the ultimate LCD display will float along the direction of the law of a wavy uneven situation. I2C 16x2 lcd

What is a mask oled module?

Mask (English: Reticle, Mask): in the production of IC process, using photolithography, is formed on the semiconductor pattern, the pattern is copied on the wafer, through the photomask must be made with the principle. Such as flushing photos, negatives copy images to use the photo.
Entity structure: full integrated circuit image chromium metal film on a quartz glass image. Fold reduction mask (Reticle): When the chromium film only partially cover glass wafer called fold reduced mask pattern usually be enlarged 4 times, 5 times or 10 times. Mask (Mask): When the chromium film on the glass when the image can cover the entire wafer is called mask.lcd module manufacturer 
Known in the industry light mask, mask, MASK Product name or PHOTOMASK), material: quartz glass, chromium and a photosensitive adhesive, the product is made of quartz glass as a substrate, on which a layer of chromium metal and a photosensitive coating plastic, into a photosensitive material, the circuit pattern has been designed by electron laser exposure on the photosensitive adhesive, the exposed area will be developed out of a circuit pattern formed on the metallic chromium, of a similar film after light exposure mask, the projection is then applied to the integrated circuit positioned by an integrated circuit lithography machine circuit of the projected light etching, the production processes are: exposure, developing, to the light-sensitive adhesive, and finally applied to light etching.mini lcd module

What is the target Character LCD Modules

Simply put, it is a high-speed target energetic particle bombardment of the target material. For example: Evaporation magnetron sputtering coating is heated to vaporize the coating ... aluminum and so on. Switch to a different target (such as aluminum, copper, stainless steel, titanium, nickel target, etc.), the type of membrane system can be obtained (such as hard, wear-resistant, corrosion of the alloy film). Target: sputtering target (purity: 99.9% -99.999%)
1 metal target: nickel target, Ni, Ti target, Ti, Zn target, Zn, Cr target, Cr, Mg target, Mg, Nb target, Nb, Sn target, Sn, Al target, Al, indium target, In , iron target, Fe, aluminum zirconium target, ZrAl, titanium aluminum target, TiAl, zirconium target, Zr, Al-Si target, AlSi, silicon target, Si, Cu target Cu, tantalum target T, a, germanium target, Ge, Ag target, Ag, cobalt target, Co, gold target, Au, gadolinium target, Gd, the target lanthanum, La, yttrium target, Y, Ce target, Ce, tungsten target, w, stainless steel target, nickel chromium target, NiCr, hafnium target , Hf, mammography, Mo, Fe-Ni target, FeNi, tungsten target, W and so on.lcd module 
2 ceramic target ITO target, target magnesium oxide, iron oxide target, a silicon nitride target, silicon carbide target, target of titanium nitride, chromium oxide target, a target of zinc oxide, zinc sulfide target, target of silica, silicon monoxide target, target ceria, zirconia target, target niobium pentoxide, titanium target, target zirconia, hafnia target, target titanium diboride, zirconium diboride target, target of tungsten trioxide trioxide, aluminum target of tantalum pentoxide, niobium pentoxide target, target magnesium fluoride, yttrium fluoride target ZnSe target, target of aluminum nitride, silicon nitride target, target boron nitride, titanium target, carbide silicon target, target of lithium niobate titanate, praseodymium target, barium target, target lanthanum titanate, nickel oxide target, sputtering target and so on.graphic lcd display module 

Character LCD Modules panel expertise

Usually in our sales of LCD, the total sales charges to your screen asking what level, we may casually say Class A, A + grade, in fact, the answer is not a professional, if consumers are professional consumers, with this on SALES talk with such disdain, and will walk away, if we can deal in all likelihood the customer has the outside market know about it, just get you out of a Lowest while, do we have to do valuable LCD sales salesman, blindly cheap shipping, not good salespeople, only to convince customers, allow customers to believe your profession, your services, you are considered Success!Lcd display module 
Conventional sense of the panel level grading standards see: LCD panel grading standards
Truly professional level panel factory standard, see: AU panel grading standards
Want to be a professional LCD LCD professional salesman must have a deep understanding of the term, the customer knows more than you, at least not in terms of customers say they totally do not understand you, here is my collection of some of the LCD terminology, we can combine their sales model to understand:
A liquid crystal panel
LCD panels are the main components of liquid crystal displays, liquid crystal display took up nearly 80% of the cost. At present the world with panel manufacturing technology manufacturers are not many, most LCD panels are used to assemble their production.lcd graphic display modules 
Ant experience: we can prove something we encounter in sales, was artificially damaged LCD panel screen for sale, the major manufacturers of aftermarket customer service answered (LCD + screen for artificial) charges close to or more than one new LCD costs, allowing guests to understand the importance of quality LCD screen, three-year free service importance!
The quality and worth of the current panel is divided into third gear.

What is the Character LCD Modules ?

LCD module simple point that screen + backlight unit.
LCD TV display unit is the LCD module, the low temperature is equivalent to the CRT picture tube.lcm module
Other parts including the power supply circuit, a signal processing circuit, of course, what the housing.
Module is divided into screen and backlight components. Two parts are assembled together, but the work is independent of the time (i.e. circuit is not relevant).
LCD backlight unit is the principle of uniform surface emit light, the light transmitted through the LCD screen of our eyes. The role of screen pixels that is to be treated for these light to display an image. Two parts contain a lot of parts, will not elaborate here.graphic lcd display module 

Adjustable LED driver chip TFT Display Module

Driver chip LED brightness adjustment can be achieved when the granularity or accuracy depends on the chip digits. The higher the number, PWM signal can be divided into smaller increments, it can provide better brightness control.

The specification of the driver chip, PWM high / low transition time should be as short as possible, so as to ensure that even in case of a small duty cycle of the output square wave pulse is accurate. This is essential to ensure tighter current matching and linearity better dimming range is essential.
In the high PWM rates, such as 25kHz, can provide low a least significant bit (LSB) of the linear brightness adjustment of the driver IC to provide the best performance. However, the conversion rate is not too fast, because of the higher frequencies may cause oscillation and other forms of electromagnetic interference (EMI). A rate of about 50ns to meet this demand, while the efficiency is maximized.I2C Lcd Module
While some LED driver IC without a communication interface, but in many backlighting applications which device is best with this feature, but this kind of interface for devices with onboard PWM generator is particularly important. This interface simplifies programming, fault monitoring, and other functions in the Inter-Integrated Circuit (I2C) type is the most common. For those who need to update the system in terms of speed, low-voltage differential signaling (LVDS) interface, such as becoming more common.
Boost converter with an on-board driver chip is no longer the need for external circuitry to achieve this functionality. In addition, it is best to use an integrated switch, because it eliminates electromagnetic interference caused by the onboard interconnection possibilities to simplify the bill of materials (BOM), saving PCB area, and no longer require the designer to specify the driver chips can be a good match transistors. The use of the boost frequency variation range is very wide, and sometimes is programmable.
Higher frequency (such as 1.2MHz) have the advantage of a smaller inductor and capacitor. Dynamic Headroom Control (DHC) mode is another important function. It is connected to the boost converter to measure all of the LED strings, and automatically adjust the output voltage to drive these LED string the minimum required voltage value. Doing so makes the current mirror of the linear drive the voltage drop decreases the chip, the drive power reduced, so that the overall efficiency increased.
Optical loop control with driver chip allows designers to use the LED light sensor to compensate for changes in temperature and lifetime. Thermal sensors can also be used to compensate for thermal effects. Optical sensors can also be used to adjust the brightness of the backlight as a response to changes in the surrounding environment, in a dark environment to adjust the display brightness.
 Ideal LED driver IC chips should contain many of the drive and the LED for protection. In an LED or LED string when a failure occurs, LED short / open circuit protection allows the backlight to continue working. In addition, over-voltage, over-current and thermal protection for the driver chips and LED provide the necessary protection. Undervoltage lockout chip is used to ensure that the drive will not work outside the specified range, because that may cause the device unable to work properly.3.5 TFT display module
With a lot of features on-chip driver circuit chip can reduce the required PCB area and bill of materials. They also reduce the design complexity, since the designer is no longer necessary to design an external circuit, or to whom to select the best components. Of course, in different applications of the importance of each feature will be different, and was selected by the driver IC is based on its price compared with the performance of the system and elected.

LED TFT Display Module

According to different display sizes, LED number may range from 10 inches monitor 30, the large flat-screen TV over 1000. Because these LED light output depends on the current, so strictly meet all the LED current demand is very important, although as with all other electronic components, the characteristics of each LED are not the same.Graphic LCD Display
If you do not minimize these differences, then the display will be a significant unevenness in brightness. Driver IC for current control, the current changes in the current matching specification to maintain a small specified range. For notebooks and monitors, the ideal goal is ± 2% or less; right TV is ± 1%.
Because many of the properties of LED with the LED current will change, so the brightness adjustment function should use the pulse-width modulation (PWM) control to achieve and maintain on-state with a constant current. While some systems use an external PWM signal (for example, some laptops use direct PWM control), but with onboard PWM generator driver chip is usually a better choice. Such devices do not require an external PWM generator can simplify system design. Some driver IC supports both ways.
Many existing backlighting applications used are lower than the PWM frequency 1kHz, in some cases, if a low-cost ceramic capacitors, may produce the human ear can hear noise. PWM frequency by choosing to support a wide range (including those that the human ear can not hear frequencies) of the device, to avoid this problem.128x32 oled

Backlit LCD and TV options for the LED driver IC oled module

Light-emitting diode (led) the inherent quality that it can replace the cold cathode fluorescent lamps (CCFL) as the next generation of televisions, desktop and notebook display backlight solutions. The power LED is much smaller than CCFL, five times longer life than the latter, more efficient and thinner thickness of the display, brightness adjustment fineness smaller, the low-voltage drive, and more environmentally friendly in itself, because the LED and CCFL different, It does not contain mercury or other harmful substances. However, all these features are only in the LED backlight driver IC between the array and the match after a good play to get full. Therefore, designers only in understanding the key driver IC features and functionality, the application needs in order to choose the most appropriate driver IC. Look at the driver IC data sheet, you will find there are many parameters to consider, this article will introduce the parameters and functions is one of the most important.serial display modules

Parameter
The first of these specifications is the driver IC can accept input voltages. If the input voltage range is narrow, it can be applied to a relatively small range. In addition, such an IC chip may not withstand a large input voltage swing, and there is always in use, a number of other transient conditions.
The maximum output voltage driver chip is also very critical, because each LED will produce 1 ~ 4V voltage drop. Driver chip must have sufficiently high output voltage to provide a plurality of LED array, the voltage drop generated. Maximum output voltage and the number of channels it can support the decision of the LED number.
This conclusion also applies to driver chip to be able to provide the maximum current of each channel. It provides a current to be matched with each design, focusing on the use of the LED type.
Most portable applications used in LED requires 20 ~ 30mA of current, and the LED display and TV often consume 40 ~ 120mA (However, in some applications requiring up to 350mA LED current). Generally, the output voltage and output current as large as possible, but to note, high output driver chip cost is usually higher than the low output of similar products, so the driver chip for exact match and application design cost savings .16x2 oled
Driver IC is the number of channels available from a few to 16, or even more. Select several channels "right" driver chip is completely determined by the system requirements. The goal is to use as little as possible to meet the system requirements driver chip to reduce costs and complexity.
However, the driver chip series LED quantity can support not only depends on its number of channels, but also on the chip's maximum output voltage. For example, the low output voltage 16-channel driver IC can support 80 LED, may only support 5 LED series; while the high output voltage 10-channel driver IC can support 160 LED, may only support 16 LED series .

Knowledge about el Character LCD Modules

The polarity of the voltage waveform of the EL luminous efficiency and life has a very important influence in the inorganic electroluminescent ZnS the conductive thermal electrons are accelerated by the high electric field excitation collision trespassing excitation light effects are produced, using unipolar pulse voltage as a driving voltage, will affect the service life, and the use of positive and negative polarity pulse voltage as the drive voltage in favor trespassing recovery after touch, do not affect life.graphic lcd display module
EL lead electrode is formed by two insulating layer between the electrodes to isolate the performance of the capacitive load driving circuit, the equivalent load of approximately 0.2-0.9nf/cm2 EL driving current is small, the size of the area of ​​the main light emitting material with requirements of the brightness ratio and to determine, generally 0.14mA ~ 1mA/cm2, EL larger the area, the capacitive load is quite increases, also increases the current flow, and thus the driving circuit with the capacitive load capacity and also considerably improved impact resistance.
EL brightness is closely related with the characteristics of drive power, to maintain the brightness is not lit, to changing the polarity of the pulse voltage, which is driven by AC EL, between the poles of a voltage when the EL, the light emitting layer is established field. Electrons in the electric field direction under the effect of accelerated motion reverse, when the electric field strength is strong enough, enough number of electrons motion, fast enough, through the collision, the luminescent material atoms in the excited state occurs on the level jumping, excited state electron light level performance jump move, if the electric field direction of the same, the number of electrons in motion gradually reduced, to excite atomic level transition occurs, the brightness of the EL gradually decreases until it does not light, if the electric field is alternating, the direction of the electron with the electric field is always in high-speed motion changes state, the atom level transition occurs uninterrupted, when the electric field changes its height when the frequency is fast enough will remain stable, no flicker, practical applications, can be roughly considered at a certain frequency is proportional to the luminance and the driving voltage, typically drives the EL peak value of the AC voltage 30V-250V
Brightness not only affected by the voltage and frequency dependent, can also be refined slightly landlord for a certain brightness is proportional to frequency voltage, operating frequency is usually cold 50-400Hz sometimes several KHZ frequency, which can be accessed at this time brightness saturation voltage plus large, no obvious improvement in the luminance. Moisture and brightness, life is inversely proportional.OLEDs
EL from the half-life is (half brightness) to be measured. It is defined as the display brightness down to half the period of initial luminance, usually this time is 3000-12000Ph, visible EL life is very long, but long high-pressure, high-frequency, so that the brightness is saturated for a long time, it will accelerate the aging and shorten its life. Because the human eye into a nonlinear response to luminance of semi-bright and full bright differentiate obvious, thus allowing EL light work less than full, and in the circuit with self-complementary circuit voltage through a corresponding increase to prolong life, but This formula in the production process can be improved to extend its life.

EL structure Character LCD Modules

EL in sandwich structures above and below each one electrode, wherein the electrode of ITO film, a light emitted from the surface of the ITO film, the lower electrode of the second electrode, also known as the back electrode, wherein the main material is silver or carbon.
Luminescent materials (mainly zinc sulfide, on behalf of mathematical formulas: ZNS) when it will have different activator, combining a variety of substances, so the different colors of light. (Currently used light pink color: pure blue, pure green, blue, white)Character LCD Modules
EL technology, which involves a complex solid-state chemistry, materials science, vacuum plating (IONSPATTERING ion sputtering), in the current research, the manufacturing process requires not only high-tech production, detection technology, and because of the special nature of the industry, requires a lot of high- scientific and technical personnel and skilled workers.
EL emission luminance and voltage relationship: L = Lo exp (-uo / u) where L = light intensity, u = excitation condition, and the light emitting structure of the light emitting powder single constant related to [1] - [3]
Luminous intensity in the low frequency range is proportional to frequency, as the frequency increases, the luminescent intensity saturation, but the surface light-emitting experiment no obvious relationship between the duty cycle, in other words, at the same frequency, changing the duty cycle of the waveform of the voltage , does not significantly change the luminous intensity.COG LCD Display