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. If there is a problem with frequency, it is not constant current. That is alternating current or pulsating current. AC or pulsating current source can be designed with constant RMS, but this power source cannot be called "constant current source". Constant current aging is in line with LED current working characteristics and is a scientific LED aging mode. Overcurrent impact aging is also an aging method adopted by the manufacturer. This type of aging is carried out by using a constant current source with adjustable frequency and current, in order to judge the quality life expectancy of LED in a short time, and can pick out many hidden dangers that cannot be picked out by conventional aging.

　　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 handling.

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