How to judge the abnormal display of LED advertising screen

After the LED advertising screen has been used for a period of time, there will be problems such as abnormal color, black screen, dark light, stroboscopic, etc. How can we judge the cause of the LED advertising screen? The LED advertising screen works normally again. 1. Driving components LED advertising screen driving components are usually constant current drive chips, such as MBl5026 and so on. These chips include 16 constant current drive outputs, and the current output value can be set by resistors. 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 brightness error of 25% to appear among the pixels of the LED advertising screen. If the LED light-emitting tubes used are not of the same grade and type of LED advertising screen, the brightness error will increase to more than 40%. 2. Light-emitting components The light-emitting components of LED advertising screens are LED light-emitting tubes, and inconsistent brightness is inevitable during the production process. However, the countermeasure adopted by LED advertising screen manufacturers is to classify into bins after the production is completed. The smaller the brightness difference between two adjacent bins, the better the consistency, but the more serious the phenomenon of low yield and high inventory will be caused.

Therefore, each LED display manufacturer controls the brightness difference between two adjacent gears at about 20%. 3. The LED advertising screen is mixed with materials during the production process, and different batches of dot matrix are used. .