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How to control and improve the quality of LED full color display
- Dec 29, 2017 -

How to control and improve the quality of LED full color display? LED full color LED display reflects the quality of an important indicator of what is? First, LED devices as the most crucial part of the full-color LED display for three reasons:


First of all, LED is the most used key device in the full color screen machine, which will use thousands to tens of thousands of LEDs per square meter.


Secondly, LED is the main body that determines the performance of the entire screen optical display, which directly affects the audience's evaluation on the display screen.


Again, the largest proportion of LED in the overall cost of the display, ranging from 30% to 70%. LED choice determines the entire screen more than 50% of the quality. If you can not choose a good LED, no matter how good the other components of the display screen can not make up for the quality defects.


LED full color LED display reflects the important indicators of quality are:


First, the failure rate


As the full-color display by tens of thousands or even hundreds of thousands of red, green and blue composed of three kinds of LED components of the yuan, the failure of any color LED will affect the overall visual display screen. In general, according to industry experience, the failure rate before LED display starts assembling to 72 hours aging should not be higher than three ten thousandths (referring to the failure caused by LED device itself).


Second, anti-static ability


LED is a semiconductor device, sensitive to static electricity, can easily lead to static electricity failure, so anti-static ability of the life of the display is crucial. In general, LED human body static mode test failure voltage should not be less than 2000V.


Third, the attenuation characteristics


Red, green, and blue LEDs all have the property of decaying brightness as working time increases. The merits of LED chips, the quality of auxiliary materials and the level of packaging technology determines the level of LED decay rate. In general, 1000 hours, 20 milliampere normal temperature light test, the red LED attenuation should be less than 10%, blue, green LED attenuation should be less than 15% Red, green and blue attenuation of the consistency of the full-color LED display The future of the white balance of a great impact, thereby affecting the display fidelity display.


Fourth, brightness


LED brightness is an important determinant of display brightness. The higher the LED brightness, the greater the current margin, to save power and maintain LED stability is good. LED has different angle values, the chip brightness has been set, the smaller the angle, the brighter LED, but the smaller the viewing angle of the display. General should choose 100 LED to ensure that the screen enough perspective. For different point spacing and different line of sight of the display, brightness, angle and price should find a balance point.


Five, consistency


Full-color display is composed of countless red, green and blue LED components composed of each color LED brightness, wavelength consistency determines the consistency of the entire screen brightness, white balance consistency, color consistency. In general, display manufacturers require device suppliers to provide LEDs in the 5nm wavelength range and 1: 1.3 brightness range, which can be graded by the device supplier through a spectrophotometer. Voltage consistency is generally not required.


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