Explain the aging knowledge of LED display screen in detail

Led aging test is a very important link in product quality control. LED products can improve their efficiency after aging and contribute to the stability of efficiency in later use. Led aging test is a countermeasure taken according to the characteristics of product failure rate curve, that is, bathtub curve, so as to improve the reliability of products. 

The aging of LED display screen is divided into white light aging (4 hours) and video aging (48 hours).

Led aging methods include constant current aging and constant voltage aging.

Constant current source means that the current is constant at any time. The problem of frequency is not constant current. That's AC or pulsating current. AC or pulsating current source can be designed with constant RMS, but this power supply can not be called "constant current source". Constant current aging conforms to the working characteristics of LED current and is a scientific led aging mode. Overcurrent impact aging is also an aging method adopted by manufacturers. Such aging is carried out by using a constant current source with adjustable frequency and current, in order to judge the quality and expected life of LED in a short time, and pick out many hidden dangers that cannot be picked out by conventional aging.

Then pay attention to the aging test of LED display screen

1. Test content: white screen, red, green, blue monochrome, gray gradient, video effect, text effect

2. The white screen test time of LED display screen shall not be less than 24 hours

3. Monochrome and grayscale gradient test shall not be less than 24 hours

4. Video and text effect test shall not be less than 24 hours

5. The aging test of LED display screen must be attended by someone, and any problem found shall be reported to the manager of the engineering department for treatment.