How to avoid the dead failure rate of LED display screen, an LED screen module is composed of thousands of LED light beads. The whole LED screen is as few as hundreds of thousands, and the small spacing LED screen is as many as millions or even tens of millions of light beads. LED screen through thermal expansion during long-term operation
How to avoid the dead center failure rate of LED display screen, an LED screen module is composed of thousands of LED light beads. The whole LED screen is as few as hundreds of thousands, and the small spacing LED screen is as many as millions or even tens of millions of light beads. During the long-term operation of the LED screen, after the principle of thermal expansion and cold contraction, the conductor will break. After the conductor is interrupted, the LED bulb will not emit light, and the service life will end. The dead point is that the light bead in the same LED module is not on. How to solve the dead point phenomenon of full-color LED screen? Generally, we only need to replace one module, but if we want to repair the dead point caused by this led module, we can only return it to the factory for maintenance. The specific reasons are as follows:
The first mock exam is made of constant current source and distributed to the whole screen to produce LED module. The LED lamp is in the same equilibrium position in the same module with standard fixture. Control the mold manufacturing process to ensure that all LED lamps in the module are free of abnormal deviation in level, up and down, front and rear. Use the same batch of red, green and blue LED lamps on each LED screen manufacturer, and re grade the red, green and blue of this batch of LED lamps. The box body adopts steel plate reinforcement structure, and strong reinforcement is added at appropriate positions. Ensure the rigidity and flatness of the plane of the box. The stamping and bending of the box are formed at one time by CNC equipment, and the CNC punch is used to ensure the accuracy of module installation in place. Appropriate allowance shall be made to eliminate the accumulated error. For constant current devices, the chip is divided into five grades, and the of each grade is divided into five grades. After glue filling, fix the lamp with a standard front cover. Each LED unit board carries out single module brightness adjustment, i.e. white balance fine adjustment, to ensure uniform white balance between modules. Assemble the module into a box. The above is the cause and solution of the dead center phenomenon of full-color LED screen. However, there is no need to worry. This situation rarely occurs due to the manufacturing technology level of LED screen manufacturers.