LED display prior to installation and after installation need to be cleaned, this is a very important aspect, can prevent the phenomenon of the LED display is not clear in the course of action, there is the phenomenon of color cast and black mosaic and so on. There will be a certain time after the display in the operation affects the display of dust and other debris accumulation, regular cleaning and maintenance LED display indoor led display, can extend the life of the LED display, and improve the quality of LED display. The LED display either cleaning or after loading screen led display screen before loading, have become particularly important. For the blue LED, voltage can change without affecting the amount of light output caused any significant impact full color led display between 4.5V ~ 5.5V, or bring the pixel difference unpleasant. Basically, the voltage of the LED can not be lower than 4.0V, because of the blue LED has a higher than conventional GaP technology using color along breakover voltage; logic voltage can vary between 3V ~ 5.5V without affecting the display of information or show strength, lower than 4.5V at work will affect the timing and logic levels may result registers and control registers changes when the dot matrix is ??less than 3V. Blu-ray intelligent display provides two methods to change the brightness led display manufacturers, are the peak current control pixels and using pulse width modulation, this function can be shown in Figure 1. The control block bit 0 D0 to D5 to be set. Besides, it is not recommended by the LED supply voltage pulse width modulation to control the brightness of the display. led display price _ 金锐光 electricity (certified) _ Enshi led display screen provided by the Science and Technology Co., Ltd. Yichang 金锐光. Yichang Jinrui Guang Technology Co., Ltd. (www.ycjrgd.com/) Hubei Yichang, Electronics & Electrical Project Cooperation leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . In Jinrui Guang electric leadership with the staff warmly welcome all inquiries negotiations to create a better future Jinrui Guang electricity.