Full color LED display coup - 'age' Information technology -

by:Xinyao LCD     2020-04-24
The development of science and technology, led advertising screen by initially monochrome display for the development of nowadays full-color led display, full color at the same time with high effective arrival rate characteristics of advertising media, and relatively low prices, unlike traditional outdoor media, its features and advantages of both television and other media at the same time, have more creative space time interaction and communication with consumers and the wider stereo space, can meet the personalized needs, with the spread of digital era concept, is a unique form of the screen. We often appear this kind of problem in the application of led, led display on the products in the beginning was that the normal work, but to light after a period of time will appear dim light, flashing, fault, the phenomenon such as intermittent bright, bring serious harm to the product. The causes of this phenomenon is roughly: application products, welding process has a problem, such as welding temperature welding time is too long, not to do a good job of anti-static, etc. , these problems caused by more than 95% is encapsulation process. The quality or production process or the led itself. Prevention is simply aging test, aging is the important guarantee of electronic product reliability, is an essential part of production at the end of the step. LED products after aging can improve efficiency and help to late use efficiency and stability. Led advertising screen aging test in product quality control is a very important link, in many cases, but often overlooked, unable to properly aging effectively. LED aging test is based on product failure rate curve is a response to the characteristics of bathtub curve, in order to improve the reliability of products, but this method is not required, after all, aging test at the expense of the single LED products of life at the cost of the LED aging methods include constant current and constant voltage aging aging. Constant current source is refers to the current is constant at any time. Have the problem of frequency is not constant current. It is communication or pulsating current. Communication or pulsating current source can be designed to RMS constant, but the power cannot be called constant current source. LED constant current aging is the most accord with current work characteristic, is the most scientific way of LED aging; Over current impact aging is also the latest led display manufacturer USES an aging means, through the use of adjustable frequency, current adjustable constant current source for such aging, in order to judge the quality of the led in a short time, life expectancy and can pick a lot of normal aging can't pick out the hidden trouble of led. So ready to buy full-color led display, friends must polish eyes, choose a good supplier, is not too small, almost no aging test. Only after aging test will slowly old.
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