In recent years, the market of LED display screen has become larger and larger, and its application has become more and more extensive. There are also more and more LED display manufacturers. In addition to well-known LED display companies, there are many small manufacturers. Although the market is more and more extensive, the competition is also more and more fierce. Technology competition develops healthily, but the price becomes worse. In order to survive, small new LED display manufacturers enter the market at a low price in order to quickly open the market and seize some customers.However, in many cases, LED display screen series accidents are caused by technical and quality problems. Then, the customer must spend money and time on maintenance, which is not worth the loss.LED display is not a short-term tool. Unlike mobile phones, it can be replaced once a year. The reason why there are all kinds of cheap domestic mobile phones on the market is that although the technical quality is not as good as that of imported apple, the sales volume far exceeds that of apple, because mobile phones are short-term tools for consumers and will be replaced in time.
But the LED display is different. It needs to be used for a long time, 5 years, 8 years, 10 years or even longer. Therefore, price must not be an important factor for consumers to choose LED display. High quality and durability are what customers need to focus on.
Since LEDs and ICs are semiconductor devices, they are very important to the working conditions of the environment, preferably about 25 C at room temperature, and their working mechanism is the best. But in fact, large outdoor LED screens will be used in different temperature environments, which may be above 60 in summer and below - 20 in winter. When LED display screen manufacturers produce products, the test condition is 25 , and different products are divided into different grades. However, the actual operating conditions are 60 or - 20 . At this time, the working efficiency and performance of LED and IC are inconsistent, which may initially belong to level I. The screen will become multi speed, the brightness is inconsistent, and the screen will naturally become blurred.
This is because the brightness attenuation and attenuation of red, green and blue light are different under different temperature conditions. At 25 C, the white balance is normal, but at 60 C, the brightness of the three color LED screens decreases and the attenuation values are inconsistent. Therefore, the brightness of the whole screen will decrease, color deviation will occur, and the quality of the whole screen will decrease.However, the IC operating temperature range is - 40 - 85 . The temperature in the box increases due to the higher external temperature. If the temperature in the box exceeds 85 C, the IC will not work stably due to high temperature, otherwise the temperature will cause too large difference in current between channels or chips. Cause flower screen.fqj
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