The most important part of Full-color LED display is led device. There are three reasons: first, the LED is a full color machine with the most number of key devices, each square metre will use thousands of to tens of thousands of LEDs; second, the LED is the main body that determines the performance of the whole screen optical display, which directly affects the audience's evaluation of the display; third, the LED in the overall cost of the display, from 30% to 70%.LED Colorful Display
LED is a full-color LED display of the most critical devices, the equivalent of computer CPU. LED selection has determined the entire display of more than 50% of the quality. If the LED is not selected, the other parts of the display can not make up for the display quality defects.LED Colorful Display
Full-color LED display special LED quality and parameters can be returned to the following five major elements:
1, failure rate: Because Full-color display by tens of thousands or even hundreds of thousands of sets of red, green, blue Three kinds of LED pixel components, any color LED failure will affect the overall visual effect of the display. Generally speaking, according to industry experience, the failure rate should not be higher than three out of 10,000 before the LED display starts assembling to the aging 72-hour shipment (refers to the failure caused by the LED device itself).
2, Anti-Static capacity: LED is a semiconductor device, electrostatic sensitive, very easy to lead to electrostatic failure, so the anti-static ability of the screen life is critical. In general, the LED human electrostatic mode test failure voltage should not be less than 2000V.LED Colorful Display
3, attenuation characteristics: red, green, blue led with the increase in working time and brightness attenuation characteristics. The advantages and disadvantages of LED chips, the quality of auxiliary materials and the level of packaging technology determine the attenuation speed of LED. Generally speaking, 1000 hours, 20 ma at room temperature light test, red led attenuation should be less than 10%, blue, green led attenuation should be less than 15%. Red, green, blue attenuation of the consistency of the full color LED display in the future white balance of great influence, and then affect the display fidelity.
4, Brightness: Led brightness is an important determinant of the brightness of the display. The higher the LED brightness, the greater the use of current, to save power consumption, maintain led stability is good. LED has different angle values, in the case of the chip brightness has been fixed, the angle is smaller, LED is brighter, but the display angle is smaller. Generally, the 100-degree led should be selected to ensure sufficient viewing angle of the display. For different point spacing and different visual range of the display, should be in brightness, angle and price to find a balance point.LED Colorful Display
5, Consistency: Full-color display is composed of countless red, green and blue led pixels, each color led brightness, wavelength consistency determines the entire display brightness consistency, white balance consistency, chroma consistency. In general, the display manufacturers require the device provider to provide 5nm wavelength range and 1:1.3 of the brightness range of the LED, these indicators by the device provider through the separation of color separation machine to achieve the classification. The uniformity of voltage is generally not required.LED Colorful Display