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Apr 09,2021| LED Knowledge
The aging test of full-color LED display screen before delivery is the last indispensable step in the production of LED display screen, and also the last test link in the production and testing of full-color LED display screen. It is an important guarantee for the quality of full-color LED display screen products.
Full-color LED display 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 based on the failure rate curve of the product, namely the characteristics of the bathtub curve to take measures to improve the reliability of the product.
The aging test time of full-color 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 is one in which the current is constant at all times.If you have a frequency problem, it's not a constant current.That's alternating current or pulsating current.AC or pulsating current sources may be designed to have constant RMS, but such sources cannot be called "constant current sources".Constant current aging is the most consistent with the working characteristics of LED current, is the most scientific LED aging way.Over-current impact aging is also a new aging method adopted by manufacturers. By using a constant current source with adjustable frequency and adjustable current for such aging, it is expected to judge the quality and life expectancy of LED in a short time, and many hidden dangers that can not be picked out by conventional aging can be picked out.
Full color LED display aging test time five points to note:
I. Test content: white screen, red, green, blue monochrome, gray gradient, video effect, text effect.
Two, the full color display screen to the white screen test time is not less than 24 hours.
Three, monochrome, gray gradient test is not less than 24 hours.
Four, video, text effect test is not less than 24 hours.
Five, the full color LED display aging test must be on duty, found problems timely report to the engineering manager for processing.
You can also click on the acceptance criteria of full-color LED display to learn more about the quality of full-color LED display!