Fluorescent powder in order to adjust the backlight is more suitable for oled module

Because the use of a flat head to the light source is to achieve cost reduction targets, so the carbon nanotube field emission phosphors used must also make an adjustment to desired characteristics of the emitted light, and will not, and the current cold cathode fluorescent lamp light emitted by a large gap. Character LCD Display
The use of the CRT white fluorescent powder, color temperature that appears relatively high, that is, the situation will be bluish, fluorescent powder so an adjustment must be re-done, or as if the light emitted from the original characteristics of the cold cathode lamp light emitted, characteristic difference is too large will affect the color filters, however, change Ruoyin back light, it is desirable to replace the cold cathode fluorescent lamp and a color filter must be followed to make changes, Perhaps there will be more harm than good, hence the choice of the phosphor can not follow the original CRT phosphors, but must do some adjustment or development.
There are about two ways to develop field emission phosphor used, the first is the use of existing RGB phosphors for color mixing, thus obtained would be more white wide color gamut, because we all know CRT phosphor powder which can reach 100% of NTSC, and at least such a backlight fluorescent powder, substantially reaches 100% NTSC is generally not a problem. serial display modules
Another way to develop new white fluorescent powder phosphors such as the setting of the initial goal is to be issued with the hope to achieve the same characteristics as the cold cathode fluorescent lamp light, so perhaps a beginning must reach phosphor coordinates 0.33,0.34 about the condition.

Multicolor LED backlit bright picture oled module

Because of the inherent characteristics lead CCFL certain colors can not break through barriers, making the color performance can not enable consumers to enjoy rich, sharp images similar nature, especially not a perfect showing bright red color. However, because the pursuit of high CRI goals, replace the CCFL light source technology will continue to be made, which, in the promising than the use of multi-color LED as a backlight, and its wide color gamut, has attracted a lot of the industry's focus, have also inputs related development. TFT Lcd Modules
weak performance of traditional CCFL red
Currently, most of the display industry are using a cold cathode fluorescent lamp as a light source monitor, and coordinates the distribution of RGB color as the color filter array, in general, CCFL so the color temperature of about 4800K, the color gamut table is reflected, can be found Only about 80% of the NTSC specification.
Of course, this display screen, or for general applications, and will not be much of a problem, or the visual experience poor color, but in the case of the face of the instrument measuring the performance of a particular color in the environment, will be able to compare the apparent impure Fai line has sub peak phenomenon. In particular, the performance of CCFL is more on the weak red light, which is the performance of the color CCFL most difficult to meet the stringent requirements that.
And, as for the order CCFL backlight source that is there is a specific factor affecting the performance of the color gamut, but may not be completely unable to think. According to the conventional tri-color color filter to be improved to compensate this defect. OLED Display Module

The use of multi-color color filter to make up the shortfall oled module

Same as using CCFL backlight source module basis, CMO has developed three models with four or more colors multicolor filters as color performance, respectively, in the original R (red), G (green) and B (blue) 3 colors, an increase of added Y (yellow) and C (cyan) 5-color filter panels. More on the basis of the RGB color Y (yellow) color filter of four colors of the panel, and in RGB 3 colors based on the increase W (white) color of the color filter panel 4.
Indeed, such a design, the same expanding the color gamut, to increase the Y (yellow) and C (cyan), and the increase in Y (yellow) of the panels, for example, the range of the NTSC color gamut compared to low temperature lcd, respectively, 115% and 109%. Increasing the white color filter panel only for the purpose to improve the overall brightness.
Of course, this is the basis of the original source, the use of color filters to achieve the purpose to enhance the color gamut, but eventually the inherent limitations, can not be so greatly expanded color gamut, may still need to be changed from a backlight, , was able to expand the color range to achieve the goal.
With current technology and components of view, quite suitable way is to use LED as a backlight, the LED has a multi-wavelength characteristics can be produced according to the unique needs of the wavelength, and the use of circuit design to complete the brightness control. lcd module 

Mercury cold cathode fluorescent lamp gradually reach the practical stage oled module

Due to the current cold cathode fluorescent tubes, the use of mercury to be discharged, so there has been shadow impact on the environment, and coupled with the EU RoHS norms, which is about to face. EU regulations from July 1, 2006, Controlling contain lead, cadmium, mercury, and hexavalent chromium and brominated flame retardants and other elements or application products imports.
Currently industry is still unable to effectively locate the cold cathode fluorescent lamp mercury alternatives, although the EU will not fully control, but has cold cathode fluorescent lamps containing mercury has made no more than 5mg limit. On industrial technology, has been able to overcome contains mercury does not exceed the upper limit of 5mg, reaching about 3mg or less, but in the long run, the threshold of mercury is still to be overcome. Character LCD Modules
Meanwhile, the use of mercury discharge factor, if the ambient temperature is too low, can also cause the phenomenon is not easy to start, this especially in the temperate and boreal markets becomes more apparent. In addition to the impact caused by difficult start, the temperature of the environment because of the use of mercury vapor pressure will also cause the luminance and luminous efficiency including some impact, so the cold start and other environmental issues is the cold cathode fluorescent tube technically most urgent be solved. Because of such factors backdrop, mercury cold cathode fluorescent tube development, has become all the cold cathode fluorescent lamp industry eager to resolve the issue. Low Temperature Display

Mercury CCFL difficult to overcome technological bottlenecks environmental temperature TFT Display Module

In general, the cold cathode fluorescent tube used in inorganic mercury are mercury, and organic mercury compared to that of the human body to a lesser extent, but the current cold cathode fluorescent tubes discarded most of the use of landfill The way to deal with, however, such an approach would make obsolete cold cathode fluorescent inorganic mercury in organic produce, also faced the issue of environmental protection, making the cold cathode fluorescent lamps, mercury-based requirements have continued being emerge. OLED Display Module
Of course, no mercury cold cathode fluorescent tubes in terms of not only refers entirely without mercury, which also includes the use of a small amount of mercury and technologies to meet environmental standards. The so-called implication is that using a small amount of mercury in the cold cathode fluorescent tube by adding a certain small amount of mercury, and mercury in these cold cathode fluorescent lamp life is reached, while also being consumed completed, and let the cold cathode fluorescent abandoned Lamp will not have much impact on the environment.
In addition, use of the environment in terms of the face, the use of mercury discharge cold cathode fluorescent tube and a biggest problem is that mercury discharge to a very high temperature sensitivity at different temperatures, there will be considerable pressure changes (Figure I), this will have on the overall performance of the display panel to bring a certain extent, perhaps in temperate regions the products to achieve color accuracy requirements, but once sold to the arctic or tropical regions the market, often color accuracy will be some differences. graphic lcd display module
Figure a pressure curve can be seen, when the temperature rises or falls several degrees, the mercury vapor pressure will be a considerable degree of change, thereby affecting the overall performance. On the ambient temperature, the boreal regions by the problems more than the tropics, resulting in a low temperature environment because of difficulty in starting, you need a longer time to reach the standard brightness and so on.
For such a phenomenon problems in the boreal areas, mostly applicable to make use of the mercury vapor pressure heater rise, and troubleshoot startup problems, and so subject. There is a very important point, because the lack of mercury wall protection, making the UV will continue to directly impact the wall, making the wall will appear premature aging and thus affect life expectancy.

CCFL find alternative element mercury TFT Display Module

In the absence of mercury cold cathode fluorescent tube technology development, global industry are positive expectations to find a substitute for mercury, but because of the relationship between characteristics and goals, have been unable to locate or high performance and mercury as a substitute for mercury element. Expected to achieve the required gas requires several conditions, including: First, to a very strong UV radiation intensity to achieve high luminance requirements. Second, the ultraviolet wavelength fluorescent wall can not bring too much damage that would otherwise occur lamp wall early deterioration phenomenon, making the life of the cold cathode fluorescent tube rapidly shortened. Third, it requires a longer ultraviolet wavelengths, as long wave ultraviolet light can be improved longer visible light conversion efficiency and improve the overall performance of the cold cathode fluorescent tube. graphic lcd 128x64
Due to the above conditions, has been developed more Xe gas to replace the use of cold cathode fluorescent tube mercury as fluorescent lamps discharge medium. The structure is being taken in the inner wall of the glass tube coated with fluorescent powder and sealed xenon gas. Disposed at one end of the glass tube with the general CCFL same internal electrode, and the spirally wound wire to the lower tube wall, as the other electrode. By applying a voltage between the internal and external electrodes to form a discharge, Xe gas discharge UV fluorescent powder is converted into visible because light. OLED Display

LED electronic TFT Display Module of true color image reproduction

Full color LED electronic display visual theory and color TV, lcd module  , is through the red, green, and blue colors of different light intensity reduction of image color reproduction. Red, green and blue image directly affects the degree of purity of the color reproduction of visual effects. However, the ratio of three color white is not a simple superposition of the three colors. First, to ensure the pure optical frequency premise require red, green and blue intensity ratio must be approximately 3:6:1; Second, since the visual sensitivity to red, the red light source required to be dispersed in the space distribution; Third, because the visual red, green, and blue light response of different non-linear curve, require different white light to red, green and blue to be similar to the television sets of the γ correction; s Fourth, the human visual ability to distinguish the color difference is limited. Therefore, you must identify the authenticity of the image color reproduction of objective indicators. In order to reproduce the true color images, the 144x32 lcd light on the electronic display should meet some of the following requirements:
① red, green and blue color should be that of the wavelength: 660nm, 525nm, 470nm or so;
② The four units with white light better (multi-tube unit can be, depending on the light intensity);
③ red, green, and blue gray level is 256;
④ LED pixel pipe must be used for non-linear correction.
Red, green, and blue light and non-linear correction can be implemented in hardware using the display control system, playback system can also be implemented in software.