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Why is the brightness of full color LED display not uniform?

Time:2015-07-19Source:This siteViews:887

The light-emitting elements is also called LED light tube, it is inevitable that its brightness is not uniform in the production process, LED display manufacturers should take appropriate measures to do sub-file after production. If the brightness difference of two lamps is much smaller, its consistency is better, but it also causes low yield and high inventory level. So, many LED display manufacturers will adjust the brightness of two lamps at around 20%. But why is the brightness of full color LED display not uniform?
Why is the brightness of full color LED display not uniform?
Generally speaking, the driving element is constant current driver chips, such as MBl5026. The chip includes 16 constant current drive output, you can set the current output value by using resistors, the error of each output should be controlled at less than 3%, the output error of different chips should be controlled within 6%.

It is normal that the brightness error between each pixel of LED display screen is 25%, if the LED light tube is not the same level and type LED display products, it may rise up the brightness error to more than 40%.

What’s more, there is another thing that we need be focused on, the brightness inconsistency of full color LED display is the root cause of the screen mess, it cannot be adjusted by device after production, LED display manufacturers need solve this problem in the production process. So, if we have brought the LED display screen whose brightness is not uniform, we need contact service provider or the manufacturer to solve it.

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