Led full-color screen brightness is inconsistent, what is the element? In this small series tell you, the formation of LED full-color screen brightness inconsistency, mainly because of the two elements of light-emitting components and driving components.
Light emitting components, that is, LED light-emitting tubes, in the production process, brightness inconsistency is inevitable. However, the countermeasures adopted by the manufacturers of LED full-color screens are to divide the products into different grades after the completion of production. The smaller the brightness difference between the two adjacent grades, the better the consistency. However, the more serious the situation of low yield and high inventory will be. Therefore, all manufacturers control the brightness difference between the two adjacent gears at about 20%.
The driver is usually a constant current driver chip, such as mbl5026. These chips include 16 constant current drive outputs, and the current output value can be set by resistance. The error control of each output of the same chip is less than 3%, and that of different chips is less than 6%.
It is normal for the LED full-color screen to show 25% brightness error among pixels. If the LED tubes used are not the same level and type of goods, the brightness error will rise to more than 40%.
In addition, it is worth noting that the LED full-color screen brightness is inconsistent, which is the fundamental element of the formation of the flower screen. It can not be corrected by the later correction equipment, as long as it is completed by the LED display manufacturers in the production process. So if you buy a screen with inconsistent brightness, please contact your service provider or manufacturer for handling.