The emergence of LED display has made people more and more convenient access to information, but also increased the channels of more advertising information dissemination, to today's information for the era of high-tech development has brought earth-shaking changes. But we found that the LED display in the application process is often the problem, that is, the screen at the beginning of the normal use of the work, but after a period of time, the screen will appear dark, flashing, fault, intermittent Bright and so on, to bring serious harm to the product.
There are many reasons for this phenomenon, but today we focus on one of the most important factors, that is, the aging process of the display:
First of all, aging is an important guarantee for the reliability of LED electronic display products, but also every piece of the screen after the completion of the program must go, if not through the aging of the display, whether indoor, outdoor or monochrome, color and full color , Are substandard products. While the LED products can improve efficiency after aging, and contribute to the late use of stable performance.
The aging test in product quality control is a very important part, but in many cases are often overlooked, can not be correct and effective aging. LED aging test is based on the product failure rate curve that the characteristics of the tub curve to take countermeasures, in order to improve the reliability of the product.
Second, LED aging, including constant current aging and constant pressure aging.
1, constant current source is the current at any time are constant. There is a frequency problem, it is not constant. That is the exchange or pulsating current. The AC or pulsating current source can be designed to be constant, but this power supply can not be called a constant current source. Constant current aging is the most consistent with the LED current operating characteristics, is the most scientific way of LED aging;
2, over-current shock aging is the latest use of a means of aging, through the use of adjustable frequency, adjustable current constant current source of such aging, in order to determine the quality of life expectancy in a short time, and can pick out Many conventional aging can not rule out the hidden dangers.
Finally, in the aging test process need to pay attention to the following:
1, the display of aging test must be on duty, found the problem in time reported to the engineering manager for processing.
2, monochrome, gray gradient test is not less than 48 hours.
3, the display screen to play black and white test time of not less than 48 hours.
4, video, text effects test no less than 48 hours.
5, the test content: white, red, green, blue, monochrome, gray gradient, video effects, text effects.