The aging of the ED display is an essential step in the production process of the LED display, and it is also a testing link in the production and testing of the LED display. It is an important guarantee for the quality of the LED electronic display product.
LED aging test is a very important link in product quality control. LED products can improve their performance after aging, and contribute to stable performance in later use. The LED aging test is a countermeasure taken based on the characteristics of the product's failure rate curve, that is, the bathtub curve, so as 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 voltage aging.
Constant current source means that the current is constant at any time. If there is a frequency problem, it is not a constant current. That is alternating current or pulsating current. AC or pulsating current source can be designed to have a constant effective value, but this kind of power source cannot be called a "constant current source". Constant current aging is in line with the working characteristics of LED current and is a scientific way of LED aging. Overcurrent impact aging is also an aging method adopted by manufacturers. This type of aging is carried out by using a constant current source with adjustable frequency and adjustable current in order to judge the quality of the LED in a short time. Expected life expectancy, and can pick out many conventional agings. Unable to single out the hidden danger LED.
Then pay attention to the LED display aging test
1. Test content: white screen, red, green, blue monochrome, grayscale gradient, video effect, text effect
2. The test time for the white screen of the led display is not less than 24 hours
3. Monochrome and grayscale gradient test shall not be less than 24 hours
4. The video and text effect test shall not be less than 24 hours
5. The aging test of the led display must be attended by someone, and if any problems are found, they should be reported to the manager of the engineering department for processing.
