time：2021-11-19 source：ZJ Lighting Views：270
What is the LED lamp beads that determine the elements of a full-color display? The general appearance of a full-color LED display is composed of many RGB three-color light-emitting diodes, each pixel combination has RGB diodes, and each group of pixel lights turns on and off To display full-color images in different colors.
The general appearance of the LED full-color display is composed of many RGB three-color light-emitting diodes, each pixel combination has RGB diodes, and the full-color pictures of different colors are displayed by the on and off of each group of pixel lights. At present, the outdoor market is still the main market for LED displays. According to industry statistics, LED outdoor displays account for 60% of the market, and they will inevitably develop into the streets and alleys in the future. If you want to understand the quality of different LED full-color display screens, you can start from the following five aspects, such as the quality and parameters of the special LED lamp beads for full-color LED display screens.
First, the failure rate
Since the full-color LED display is composed of tens of thousands or even hundreds of thousands of pixels composed of three red, green, and blue LED lamp beads, the failure of any color LED lamp beads will affect the overall visual effect of the display screen. Generally speaking, according to industry experience, the failure rate between the start of assembly of the LED display and the 72-hour aging before shipment should be no more than one ten thousandth (referring to the failure caused by the LED device itself).
Second, antistatic ability
LED lamp beads are semiconductor devices, which are sensitive to static electricity and can easily cause static failure, so the antistatic ability is very important to the life of the LED display. Generally speaking, the failure voltage of the human body electrostatic mode test of LED lamp beads should not be lower than 2000V.
Third, attenuation characteristics
The red, green, and blue LED lamp beads all have the characteristics of brightness attenuation as the working time increases. The quality of LED chips, the quality of auxiliary materials and the level of packaging technology determine the attenuation speed of LED lamp beads. Generally speaking, after 1000 hours, 20 mA normal temperature lighting test, the attenuation of the red LED lamp beads should be less than 10%, and the attenuation of the blue and green LED lamp beads should be less than 15%. The consistency of red, green and blue attenuation is correct The white balance of the full-color LED display will have a great impact in the future, which will further affect the display fidelity of the LED display.