Analysis of the reasons for the inconsistent brightness of full-color LED display

The light-emitting element, that is, the LED light-emitting tube, is inconsistent in brightness during the production process. However, the countermeasures adopted by the LED display manufacturers are to perform binning after the completion of production. The smaller the difference in brightness between the adjacent two files, the better the consistency, but the higher the yield and the higher the inventory. Therefore, each manufacturer has controlled the brightness difference between two adjacent gears to about 20%.

The driving component is generally a constant current driving chip such as MBl5026. These chips contain 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 25% brightness error between LED pixels to be normal. If the LED light tube used is not the same level or type of product, the brightness error will increase to more than 40%.

It is also worth noting that the brightness of the full-color LED display is inconsistent, which is the root cause of the flower screen. It cannot be corrected by the later correction equipment, and it can only be realized by the manufacturing process of the LED display manufacturer. Therefore, if you purchase a screen with inconsistent brightness, please contact the service provider or the manufacturer.

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