First understand the main cause of LED display module color cast:
1, LED lights: (including the chip parameters are inconsistent, packaging glue material defects, solid crystal position error, spectral separation of the error and other factors), will affect the same batch of LED light emission wavelength, brightness and angle. Therefore, the production of LED electronic display has a very important process: mixed lights. All the same color of the LED lights mixed evenly, and then inserted in the PCB. The advantage of doing so is to avoid the LED module partial color cast.
2, the production process: LED module over the wave after welding, LED location has been fixed, then it should not go to it. But many companies do not have the protection of the conditions, often in the test, repair, solder row pin row, aging and transfer the process of the collision, bumping the LED lights. And then in the irrigation before the so-called the whole line, so easy to lead to LED lights on the rules of the East and West, resulting in die color cast.
4, the power supply problem: the design of LED display, for the selection of what kind of material (including power supply selection and use), can not be aware of the power supply system problems, resulting in LED module power supply inequality.
5, control system, control IC: LED display manufacturers do not have LED display control system and control IC design and development, testing and production capacity. Production of the display of course, can not be guaranteed, the only thing to do is to tune the parameters.
Therefore, when the LED lights and the production process is due to LED display module color cast problem, only the module rework or replacement. When the power supply problem, you need to replace the power supply lights and so on. If the control system and IC problems, can only require manufacturers to repair or solve.