LED aging testing is a very important part of product quality control. LED products can improve their performance after aging, and contribute to the stability of post-use performance. The LED aging test is a countermeasure based on the failure rate curve of the product, that is, the characteristics of the bathtub curve, to improve the reliability of the product.
The aging of the LED display is divided into white light aging (4 hours) and video aging (48 hours).
LED aging methods include constant current aging and constant pressure aging.
A constant current source means that the current is constant at all times. If there is a frequency problem, it is not a constant current. That is AC or pulsating current. The AC or pulsating current source can be designed to have a constant rms value, but this power supply cannot be called a "constant current source." Constant current aging is the most suitable LED current aging method and is the most scientific LED aging method. Over-current impact aging is also the latest aging method adopted by manufacturers. It can be used to determine the quality life expectancy of LEDs in a short time by using a constant current source with adjustable frequency and current, and it can pick out many routines. A hidden LED that cannot be picked out by aging.
Then LED display aging test attention
1, test content: white screen, red, green, blue monochrome, gray gradient, video effects, text effects
2, led display white screen test time is not less than 24 hours
3, monochrome, grayscale gradient test no less than 24 hours
4, video, text effect test is not less than 24 hours
5, led display aging test must be someone on duty, found that the problem was reported to the engineering department manager for processing.
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