Publisher: Supplier of LED Display Time: 2017-05-18 Views: 1699
Pixel runaway: The pixel runaway rate refers to the proportion of the smallest unit of the LED screen when it does not work properly. The ratio of the number of out-of-control pixels to the total number of full-screen pixels, we call this phenomenon the out-of-control rate of full-screen pixels. In order to avoid the concentration of out-of-control pixels in a certain area, the out-of-control rate of regional pixels proposed by us is between 200×200 pixel areas, and the number of out-of-control pixels is proportional to the total number of pixels in the area. This out-of-control pixel is quantized like a discrete distribution, which makes it more convenient and intuitive to see at a glance.
Pixel runaway mode: Pixel runaway is generally divided into two points. A blind spot is what we call a blind spot. In layman's terms, it is not bright when it needs to be bright, so it is called a blind spot. The second is the constant bright spot, which means that it is just on when it needs to be off. This phenomenon is called the constant bright spot. Normally, out of control will not mean that all the red, green and blue lights in the same pixel are out of control at the same time, but as long as one of the lights is out of control (no matter which light it is), we usually call this pixel out of control. At this time, someone will ask what to do if the pixels of the full-color LED display are out of control.
Because LED failure cannot be detected in the conventional inspection method of LED. Usually under harsh conditions such as high temperature, low temperature, and rapid changes relative to temperature, due to the difference in thermal expansion of LED chips, brackets, inner leads, die-bonding glue, PPA cups and other materials, the internal stress is different. The mechanism of LED failure caused by electrostatic discharge is more complicated. Equipment, tools, utensils and human body may have static electricity and discharge it. However, if the blue-green tube fails, it is usually caused by the breakdown of the LED junction by electrostatic discharge. Due to the cumbersome production process of LED display screens, electrostatic discharge is difficult to prevent, so the electrostatic protection process must run through the whole process of production.
In addition, in different occasions, the actual requirements for the pixel out-of-control rate are also different. The full-color LED display indicators are normally required to be controlled within 1%, and the monochrome LED display indicators are required to be controlled within 10%. within one. At present, there is no better solution for full-color LED display pixels. Liancheng Fa hereby recommends contacting your service provider and returning to the factory for repair. However, if the maintenance cost is too high, you can consider replacing the problematic module unit boards. to replace.