How to detect the screen appears a small crack on the panel oled module

Screen panels are very sophisticated things in the manufacture and use of the process if done incorrectly , may cause the screen suffer damage. So Apple is how to detect whether the device's screen was damaged , there were minor cracks and other problems?

Screen panels are very sophisticated things in the manufacture and use of the process if done incorrectly ,mini lcd module may cause the screen suffer damage. So Apple is how to detect whether the device's screen was damaged , there were minor cracks and other problems?

Last week, the U.S. Patent and Trademark Office published the acquired patents, these patents and manufacturing processes, improvements and other related small adjustments . Here we highlight a set of apples used to detect cracks in the screen system patents . Apple's use of external resistors way to detect trace debug screen panels or other devices on the crack pattern .

This system typically includes screens and data processing circuit . Screen with a display panel may be , its periphery is the external resistor tracking facility . Screen intermittent detection circuit can detect external resistor tracking facility fracture, while the data processing circuit can determine the seriousness of the display panel is being damaged. If the display panel is severely damaged, OLED Display the data processing circuit can also be issued a warning to the user's screen destruction issue.

CLED and OLED those things oled module

CLED and OLED Module Both are self-luminous , brightness, contrast and so little difference , OLED advantage of thinner that can be done , but CLED also has some advantages, such as longer life expectancy than OLED , and lower cost than OLED . As long as yield improvement , cost will be lower than the OLED .

Sony due to technical problems , failed to produce a large-screen OLED, which turned CLED research and development, pilot production of 55 -inch prototype CLED , I mainly want to get rid of the dependence of large flat display panel . But the small screen , is still not given up on the use of OLED R & D , indicating little difference between the two properties ,SPI lcds the same is the future mainstream of development of new display .

With you to understand Character LCD Modules large screen project implementation point

A complete set of large-screen LCD splicing system , in addition to the front of the screen , the will to involve computers, networks , video surveillance, integrated wiring and numerous peripherals and many other devices , these features also created a large-screen LCD splicing system installation complex and difficult characteristics. In fact, in addition to these features , large-screen LCD splicing system for engineers not only have excellent engineers and technicians , but also have strong project management and operational capacity , only to have these features in order to respond flexibly to various installation projects .
Typically, large-screen LCD splicing system project can be divided into four distinct phases , namely: project planning, preliminary survey , project implementation and post-project . Among these four stages , pre- survey and implementation of the project is very important, if these two stages in the implementation process problems, will seriously affect the progress of the projects and the quality of the projects . Before the implementation of the project -based investigation and implementation of two parts which need to pay attention to what ?
First, the pre-construction survey points:
Pre-construction survey in addition to the construction site in person to understand the investigation , they also need to conduct a detailed and customer communication , and make the overall construction project planning , as these largely determines the length of the project cycle , cost control, and rendering the final result , it must be particularly careful.
1 First, install the equipment on the ground to be flat.
Because the entire large-screen LCD splicing system weight is very large especially rear stitching, its technology determines its cabinet is very large, and very heavy, so if the floor is ceramic tile installation of equipment , it must first confirm whether it can withstand such weight , preferably fixed on another device antistatic floor on the ground, in order to ensure long-term ground by heavy deformation.
2 , followed by wiring
Large-screen LCD splicing system wiring, power lines and signal lines to be separated in order to avoid unnecessary interference with the signal ; another big screen COG LCD Display splicing according to the specifications , the cabinet position , the signal source location for all kinds of lines calculated cable length , number of joints and the signal line names. But also confirm with the customer , project pipeline channel is available to meet the actual needs, in order to continue follow-up work .
3 , ambient light
Because large-screen LCD splicing products brightness is relatively limited, if the system of ambient light is too bright , the picture effect would have been affected . Under normal circumstances, required within 4 meters in front of the screen is dark , it is best not to install fluorescent tubes can be installed concealed downlights , light to shine directly on the screen can not and must have a separate switch.
In addition to the installation of tube lights and large screen devices in parallel , try to make the work area has adequate lighting , but will not have a significant impact on the screen , the screen may be near the incoming light ( such as windows ) , if necessary, to be blocked while the device is running best to turn off the light ,16x2 lcd in order to ensure normal operation of equipment .
4, the framework requires
Taking into account the convenience of installation and maintenance , the frame must be removable edging edging . Outside the framework of the fight away from the wall along the side ( up and down about four sides ) set aside about 25mm clearance on each side , a large video wall should be increased according to the number of columns margin . In addition , in order to post into the box maintenance, repair channel principle is not less than 1.2m wide. Removable side bar to hold the edge of the screen 3-5mm is appropriate, in the box and the screen is fully in place, and finally fixed removable trim.

Challenges thinner devices oled module

Now, that is frivolous fashion. Actively launch increasingly thin touchscreen devices, especially touch-screen phone, face a double problem: First, from the display coupled to the sensor noise increases; Second, the parasitic capacitance of the sensor to improve.
Display the generated noise relative to the charger noise is much lower in terms of strength, but the impact on the performance of a great touch because of its close distance of the touch sensor. Although the AMOLED display is very quiet (but more expensive than LCD), but most of these are on the market today higher ACVCOM noise and DCVCOM type LCD display. The common electrode VCOM of the display layer is the source of noise. Let us come back to discuss the equation (1), this is to determine the parallel plate capacitor touch sensor electrode and the display designated to receive arising between VCOM layer capacitor size. Here, area "A" is the entire custom lcd area of ​​the receiving electrode, the display cover the entire screen, therefore, the distance "d" is that the receiving electrodes and the distance between the layers VCOM.
Previously, touch screen device uses an air gap or shield to protect the screen from the touch sensor coupled to the receiving electrode noise impact. However, these solutions will increase the thickness and costs (4 inch screen shielding layer adds cost up to $ 1.00). Now, as the devices become increasingly thin, the air gap and the shield have been canceled, and the touch sensor using an optically transparent adhesive (OCA) is connected directly to the display. This causes the sensor closer to the receiving electrode VCOM higher noise level, so it will reduce the "d", to increase the capacitance and coupling more noise. Since OCA (dielectric constant of 3) replace the air gap (dielectric constant of a), therefore capacitance will be further improved. Slim-type product development trend is the next part or all of the touch sensor will need to be integrated in the display, which is the so-called in-cell (cell touch), On-cell (plug-touch). This integrated protocol stack will display the sensor closer to the display of the receiving electrode VCOM layer, thereby coupling more noise.
Slimmer shape product development The second problem is the parasitic capacitance touch sensor (CP) increases. In order to try to make the whole protocol stack becomes thinner, ITO substrate layer (made of glass or PET) require increasingly thin. This shortens the sensors transmit and receive the distance between the electrodes, thus increasing the capacitance. CP increases the scanning touch panel requires a longer charging and discharging, which reduces the maximum frequency of the scanning panel. The problem with this is that we want to scan at higher frequencies because of the higher frequency noise is usually small. In addition,low temperature lcd display scan times also mean increased power consumption and decreased refresh rate.

Teach you six strokes to solve Character LCD Modules splicing screen Huaping

The first one: Check the LCD splicing screen and graphics card connection is loose. Poor contact will result in a " clutter ", " noise " is the most common form of Huaping phenomenon .
The second measure : OLED Display Module Check graphics card overclocked . If excessive overclocking graphics cards , usually irregular , intermittent stripes. At this time , it should be appropriate to reduce the overclock . Note , first of all to reduce the memory frequency .
The third measure : Check the graphics quality . If after replacing graphics Huaping problems , and in the use of the first and second trick did not work , the card should be checked against electromagnetic interference and electromagnetic shielding whether the quality of clearance. Specific approach is: some of the parts that may cause electromagnetic interference as far away from graphics card installed ( such as hard disk ) , look Huaping disappears. If it is determined that the electromagnetic shielding function graphics , but off , replace the video card, or home-made shield .
Fourth trick : Check the LCD splicing screen resolution or refresh rate is set too high. LCD splicing screen resolution is generally lower than CRT monitors , if more than the manufacturer's recommended best resolution , there may Huaping phenomenon.
Fifth move : check if you have an incompatible graphics card driver. This is generally easy to ignore , because the graphics driver updates faster and faster ( especially NVIDIA graphics card ) , some users are always eager to install the latest version of the driver . In fact , some of the latest test version of the driver either , either graphics or game for a specialized version optimized for the use of such drives can sometimes lead to the emergence of Huaping . Therefore , it is recommended that you try to use Microsoft-certified drivers , the best use of graphics drivers provided by the manufacturer .
Sixth trick : If you use more than five strokes later, still can not solve the problem , there may splicing lcm module quality problems. In this case, replace the other monitor to be tested.

Factory Network Video Monitoring System Design TFT Display Module

In the modern enterprise , the factory to implement a comprehensive network video surveillance system : the enterprise security monitoring section can factory gate , factories, office buildings ,lcd module  perimeter fences , warehouses and other targets in real-time clock video surveillance, the factory produced the main channel and the venue monitoring ; administrative control section for office space for video surveillance , in order to understand the work of employees , enhance employee attendance management, improve work efficiency ; governance component produced on the production line and shipped throughout the implementation of monitoring, as well as the work of the workshop is to understand the situation and the pipeline the production situation . Some video images to be kept confidential , or some workshop environment harmful to human health due to work needs unattended remote monitoring of the production process can be used ; certain devices inaccessible due to the installation location , labor inspections homework more dangerous , you can use the camera for remote supervision ; business leaders use the desktop computer in the office , to keep abreast of all major aspects of the real production conditions produce , handle emergencies, and on-site two-way voice communication , going to be using a browser to access way into the system , to keep abreast of the situation produced .
This monitoring system is composed of the following segments :
1 Front: at each monitoring point installation million high-definition digital video camera , according to the different environment monitoring use an ordinary bolt , bolt infrared ,character oled display  infrared dome and speed dome , such as different models.
(2) Transmission : According to the distance from the camera to the monitoring center selected transmission mode, the short distance ( 400 m or less ) and switches cascaded through the network cable into the control center , distant cascade through the network cable and switches plus trunk fiber and fiber optic transceivers enters the monitoring center.
3 Monitoring Center : Monitoring center is mainly composed of four parts , room switch , DVR host , TV wall, managed host.
4 control center : the control center by the management host , display equipment.
5 Client : Client host through client software to access the camera , maximum support 36 channels with the screen display .
Front of all the cameras are connected room switch signals , each DVR host can also access switches , each host display 16 images, signals are connected via VGA LCD television or monitor , in addition to and connected to the DVR LCD TV , but also increase the number of television sets ( for example, coupled with the LCD splicing screen ) , these TV access via HD decoder box room switch ( each TV with a decoder box ) . Video data saved on each DVR unit , according to the recording time needed to mount different sized hard drive or disk cabinet . All the operations control center to achieve through the management host , including image preview , the screen switches on the wall, check the host videos, but also according to the need to achieve alarm linkage function. Each monitoring center through a switch the DVR access to Internet,Character LCD Modules a remote user ( eg superiors ) can be carried out by the client image preview , capture, call recording and other operations ( according to different users different permissions ) .

Bar Character LCD Modules TV wall system requirements outlined Analysis

With the flat-panel TV prices fall, more and more bars opted to transform the flat-panel TVs ,4.3 TFT display module combined into a large bar LCD TV wall mosaic in order to achieve modern , dynamic site-specific display. Suitable for bar display splicing system needs to use the increasing bar LCD TV wall system generally consists of large screen display wall , display processor and sound control system.
Because bar special environment , the use of bar TV wall system requires the following characteristics:
( 1 ) LCD Video Wall with a bar and splicing processors are often continuous working time is longer, the work day boot time up to 9 hours or more, and require seven days a week . Therefore requires the use of continuous and stable work can not easily damaged display device and splicing processors. Civilian large-size LCD TVs continuous working time is too long , LCD TV life will be greatly affected , while Beijing Kaibo Tai Qi production of LCD splicing screen or large-sized LCD screen , using industrial-grade display panel, support 7 × 24 hours a day, and brilliant color, high brightness, life is much higher than ordinary household LCD TV.
( 2 ) require low cost , relative to large enterprises and government investment projects , bars for the high prices reflected endurance is very fragile, so the overall LCD splicing wall bar prices are not too expensive. The Beijing Kaibo Tai Qi company has its own manufacturer, also has regional branches, with in addition to the LCD panel ( not grasp the domestic production of LCD splicing screen panel technology ) outside of the whole industry chain downstream . Spread avoid middlemen and high logistics costs, the real benefit of our customers , so splicing LCD screen is very good value for money .
( 3 ) the signal requires a simple , often only need to live video signals from a computer or a dynamic picture playback , but not more complex signal input; also requires simple manipulation of the display processor , the actual application is often no need for control , or mode conversion , requires only a power-up to ;
( 4 ) signal output display requiring a simple and generally only need to assemble into a large screen ,Character LCD Module or the same combination of different splicing , does not require a variety of different signals at the same time display, and fancy window control and other complex functions are not practical ;
( 5 ) Since the liquid crystal display different splicing unit , requiring a splicing processor can support different splicing unit placement , requires splicing processor can support a display unit such as horizontal and vertical angles side , and asked to show the picture can be a complete mosaic ;
( 6 ) some bars on the screen, the entire screen display is less demanding, allow some splicing gap , you can use the LCD wide-brimmed seam stitching . Of course, some of the bar to pursue the kind of full-screen display of the shock effect , you can use our Narrow LCD screen between each patchwork stitching unit is only 6.7 mm , this range comply with the principle of human visual perception , does not affect the viewing.
( 7 ) Certain upscale bars, often also require different mosaic wall bar linkage site , also shows a mosaic wall row / column of the screen, or if you need the system to automatically run a different display modes. Previously to achieve a more dynamic, modern display.

The most obvious technical advantages PDP plasma splicing oled module

PDP, Plasma Display Panel 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 ,Character LCD Modules surrounded by hermetic sealing by forming a discharge space . The discharge space filled with neon , xenon mixture of inert gas as the working medium .
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,128x64 oled 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.
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.