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Causes of chromatic aberration failure of LED full-color screen

by:Toponetech     2021-06-25
Abstract: What causes the color failure of the LED full-color screen? 1. Light-emitting elements LED full-color display light-emitting elements, namely LED light-emitting tubes, are inconsistent in brightness during the production process. However, the countermeasure adopted by LED electronic display manufacturers is to divide them after the production is completed. The smaller the brightness difference between two adjacent files, the better the consistency. But what causes the color failure of the LED full-color screen? 1. Light-emitting elements LED full-color display light-emitting elements, namely LED light-emitting tubes, are inconsistent in brightness during the production process. However, the countermeasure adopted by LED electronic display manufacturers is to perform classification after production is completed. The smaller the brightness difference between two adjacent files, the better the consistency, but the appearance of low yield and high inventory will be more severe. Therefore, each manufacturer controls the brightness difference between two adjacent gears at 20%. 2. Drive components The drive components for LED full-color display screens are usually constant current drive chips, such as MBl5026. These chips include 16 constant current drive outputs, which can be used to set the current output value. The error of each output of the same chip is controlled within 3%, and the output error of different chips is controlled within 6%. It is normal for the LED full-color display to show a brightness error of 25% between pixels. If the LED tube used is not the same level and type of full-color touch display, the brightness error will rise to more than 40%. 3. The display is mixed with materials during the production process, and different batches of dot matrix are used. 【touch display】
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