For large outdoor LED display, once the color difference is present, the influence is very huge. But the larger the screen, the more display elements, the more likely to fail. Don’t worry about today’s Sichuan LED display manufacturers to answer why LED screen will have color difference
For large outdoor LED display, once the color difference is present, the influence is very huge. But the larger the screen, the more display elements, the more likely to fail. Don’t worry about the LED display manufacturers in Sichuan today to answer why LED screen has color difference?
1. Light emitting element
LED full color display light emitting element, namely LED light-emitting tube, is inevitable in the production process. However, the strategy adopted by LED electronic display manufacturers is to divide the production after production. The smaller the brightness difference between the adjacent two gears, the better the consistency, but the more severe the appearance of low yield and high inventory will be formed. Therefore, each manufacturer controls the brightness difference of two adjacent gears at 20% pendulum.
2. Drive element
The driving elements of LED full color display are usually constant current drive chips, such as mbl5026, etc. The internal of these chips includes 16 constant current drive outputs, which can set current output value with resistance. The error control of each output of the same chip is within 3%, and the output error of different chips is controlled within 6%.
It is normal that 25% brightness error is displayed between pixels of LED full color display screen. If the LED light emitting tube used is not the same level and type of full-color LED display screen, the brightness error will be increased to more than 40%.