How to control and improve the quality of full color LED display? What is the important indicator reflecting the quality of the full color LED display LED? led street light standards. The first LED devices asthe most critical components of the full-color LED display for three reasons:
First of all, LED full color machine used in the largest number of devices per square meter will be used only a few thousand to tens of thousands of LEDs;
Secondly, the LED is to determine the main body of the optical display performance ofthe entire screen, led street light standards. a direct impact on the evaluation of the audience on the screen;
Once again, the LED display the overall cost to the proportion of the largest, ranging from30% to 70%. LED choice determines the quality of more than 50% of the entire display. LED high bay. If not other parts of the good LED, display, even the best can not make up the displayquality defects.
Reflect the quality of the full color LED display LED indicators are:
First, the failure rate
The full-color display by the tens of thousands or even hundreds of thousands of clusters of red, green, led street light standards. blue LED composed of primitive composition of any one color of LEDfailure will affect the display of the overall visual effect. In general, industry experience inthe LED display assembly to the aging failure rate in the 72 hours before shipping shouldbe no higher than three ten thousandths (LED device itself causes the failure).
Second, the antistatic ability
LEDs are semiconductor devices sensitive to static electricity can easily cause staticfailure,led street light standards. antistatic ability is critical to the life of the display. In general, LED body staticmode test failure voltage should not be less than 2000V.
Third, the attenuation characteristics
Red, led street light standards. green and blue LEDs With the increase in working hours, the light attenuationcharacteristics. The pros and cons of the LED chip, The quality of the auxiliary materialsand packaging technology standards determines the level of the decay rate of the LED.In general, the light test of 1000 hours, 20 mA at room temperature, the attenuation of thered LED should be less than 10%, blue, led street light standards. green LED attenuation should be less than 15%.Consistent attenuation of red, green, blue, full-color LED display white balance impact,thereby affecting the display fidelity.