LED aging methods include constant current aging and constant voltage aging. Constant current source means that the current is stable at all times. If there is a frequency, it is not a constant current. That's alternating current or pulsating current. Alternating current or pulsating current source can be described as stable effective value, but it can't be called "constant current source".
Constant current aging is the most suitable characteristic for LED current operation, and it is also the most scientific aging method for LED display screen. Overcurrent impact on the aging of Fashion Design Institute is also the latest aging method chosen by manufacturers. This aging is carried out by using a constant current source with adjustable frequency and current. The purpose is to judge the expected life of LEDs in a short time, and many dangerous LEDs that cannot be picked out by conventional aging can be picked out.
Extended data:
The aging test of LED display screen refers to simulating whether there will be abnormality after working for a long time, which is an important guarantee for the reliability of LED display screen and the last essential step for LED display screen to leave the factory.
Description of LED display aging test:
1, test content: white screen, red, green and blue monochrome, gray gradient, video effect, text effect.
2. The white screen test time of 2.led display screen shall not be less than 24 hours.
3, monochrome, gray gradient test not less than 24 hours.
4, video, text effect test not less than 24 hours.
5, led display aging test must be attended, found that the problem timely report to the engineering manager for processing.