Looking at the full-color LED display module from the side, the color cast and pattern between the modules are inconsistent. What is going on? Why does the LED display have color difference? The following is an analysis of the reasons for the color cast of the LED display module. After reading these, your doubts can be solved.
1. Problems with LED lights: (including inconsistencies in chip parameters, defects in packaging glue materials, position errors during die bonding, errors in light and color separation, etc.), which will affect the wavelength, brightness and angle of LED lights in the same batch. Therefore, there is a very important process in the production of LED displays: mixing lights. After mixing all the LED lights of the same color, insert them on the PCB. The advantage of this is that it can avoid the partial color cast of the LED module.
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2. Production process: After the wave soldering of the LED module, the position of the LED has been fixed, and it should not be moved at this time. However, because many manufacturers do not have the protection conditions, they often collide and bend the LED lights in the process of testing, repairing, soldering pin headers, aging and transferring. Then perform the so-called whole line before the glue is poured, which can easily cause the lights on the LED screen to fall irregularly and cause the color cast of the module.
3. Power supply problem: When designing the LED display screen, it is impossible to know what materials to choose (including the selection and amount of power supply). The power supply system has problems, resulting in uneven power supply for the LED modules.
4. Control system and control IC: Because LED display manufacturers do not have the design, development, testing and production capabilities of LED display control systems and control ICs. Of course, the LED display produced cannot be guaranteed, and the only thing to do is to adjust the parameters.
Therefore, when the color cast of the LED display module is caused by the LED lamp and the production process, the module can only be repaired or replaced. When it is a power supply problem, the power lamp needs to be replaced. If it is a control system and IC problem, you can only ask the manufacturer to repair or solve it.
