LED display set microelectronic technology, computer technology, information processing in one, with its colorful, wide dynamic range, high brightness, long life, stable and reliable, indoor monochrome display, becoming the most advantage of the next-generation display media, LED displays have been widely used in large squares, commercial advertising, sports stadiums, information dissemination, press releases, securities trading, outdoor color display, meet the needs of different environments. LDX advertising brief display ratio is the ratio of the definition of the maximum brightness value (white) divided by the minimum brightness value (black) ratio. The ratio of the CRT monitor is usually up to 500: 1, Bank monochrome display that presents a real all-black screen on CRT monitor is very easy. But LCD is not very easy, Jinzhong monochrome display, the backlight cold cathode ray tube is composed of hard to do fast switching operation, so the backlight is always in the lit state. In order to get a black screen, the LCD module must be completely light coming from the backlight completely blocked, but in the physical characteristics of these components and can not fully meet this requirement, will always be some light leakage occurs. In general, the ratio of the human eye can accept about 250: 1. Monochrome display, LDX do word factory (online consultation), Shanxi Jinzhong monochrome display is provided by DS Xuan Culture Media Limited. Shanxi Xuan DS Media Limited (www.sxdxzs.com/) is a leader in Taiyuan, advertising services, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In LDX doing word factory leadership with the staff warmly welcome all inquiries negotiations to create the word factory LDX do a better future.