The technological progress of LED is the biggest driving force to expand market demand and application. At first, LED was only used as a miniature indicator light in high-end equipment such as computers, stereos and video recorders. With the continuous progress of large-scale integrated circuits and computer technology, LED display screen has risen rapidly, and gradually extended to securities (Zheng) ticket vending machines, digital cameras, mobile phones and other fields.
LED display screen integrates microelectronics technology, computer technology and information processing, and has become the most advantageous new generation display media with its advantages of bright color, wide dynamic range, high brightness, high definition, low working voltage, low power consumption, long life, impact resistance, bright color and stable and reliable work. LED display screen has been widely used in large squares, commercial advertisements, stadiums, information release, news release and securities trading, which can meet different environments.
Second, what is an LED display? Since the mid-1980s, monochrome and multicolor display screens have appeared, initially text screens or animation screens. In the early 1990s, with the development of computer technology and integrated circuit technology, the video technology of led display screen was realized, and TV images were directly put on the screen. Especially in the mid-1990s, blue-green ultra-high brightness led was successfully developed and put into production, which greatly expanded the application of outdoor screens. The area varies from 100 meters to 300 meters. At present, LED display screen has been widely used in stadiums, squares, meeting places and even streets and shopping malls. The full-color screen of NASDAQ in Times Square in the United States is the most famous, with an area of 120ft * 90ft, equivalent to100-300m, and super bright blue19 million. The exchange rate screen and interest rate screen in banks also account for a large proportion. Recently, the information screen in expressway and overhead has also made great progress. The application of light-emitting diodes in this field has reached a large scale, forming a new industry, and it can be expected that there will be a stable growth.
Third, the development history of LED display screen The technological progress of LED is the biggest driving force for expanding market demand and application. At first, LED was only used as a miniature indicator light in high-end equipment such as computers, stereos and video recorders. With the continuous progress of large-scale integrated circuits and computer technology, LED display screen is rising rapidly, and gradually extended to the fields of stock quotation machine, digital camera, PDA and mobile phone.
LED display screen integrates microelectronics technology, computer technology and information processing, and has become the most advantageous new generation display media with its advantages of bright color, wide dynamic range, high brightness, high definition, low working voltage, low power consumption, long life, impact resistance, bright color and stable and reliable work. LED display screen has been widely used in large squares, commercial advertisements, stadiums, information release, news release and securities trading, which can meet different environments.
Four. The history of LED development can be divided into the following stages: the first stage is from 1990 to 1995, mainly monochrome and 16 level two-color graphic screens. Used to display text and simple pictures, mainly used in public places such as stations, financial securities, banks and post offices. , as a public information display tool. In the second stage, from 1995 to 1999, a double-base * * * screen with 64 and 256 gray levels appeared. The application of video control technology, image processing technology and optical fiber communication technology has pushed LED display screen to a new height. At this time, the large-scale integrated circuit chip for LED display control has also been developed and applied by domestic enterprises. In the third stage, from 1999, a large number of red, pure green and pure blue LED tubes flooded into China. At the same time, domestic enterprises have carried out in-depth research and development work, and the full-color display screens produced by red, green and blue LEDs have been widely used, and a large number of them have entered public places such as stadiums, convention centers and squares, making domestic large screens enter the full-color era. With the rapid development of LED raw material market, 200 1 year surface mount devices came out, mainly used in indoor full-color screens. With its characteristics of high brightness, bright colors and low temperature, the spacing between points can be adjusted at will, which is accepted by demanders at different price points. In just over two years, the product sales exceeded 300 million yuan, and the application market of surface mount full-color LED display screen entered the new century. In order to adapt to the "slimming" plan of the 2008 Olympic Games, Liard developed a surface-mounted two-color display screen, which is widely used in training halls and game timing and scoring systems. In terms of full-color screens in Olympic venues, in order to reduce investment, most full-color screens are detachable, which can be used as live broadcast tools during the Olympic Games and rented after the games, and can also be used as application tools in public places such as performances and national policy announcements to recover costs as soon as possible. As far as the market is concerned, China's entry into WTO and Beijing's successful bid for the Olympic Games have become new opportunities for the development of LED display industry. The domestic LED display market continues to grow. At present, the domestic LED display market share is nearly 95%. The international market capacity of LED display screen is expected to increase by 30% every year. The main manufacturers of LED display panels are concentrated in Japan, North China and other places, and the export share of LED manufacturers can be ignored. According to incomplete statistics, there are at least 150 manufacturers producing full-color screens in the world, among which there are about 30 large companies with complete products. At present, with the active promotion of LED industrialization in China, the production technology of domestic LED display screen is basically synchronized with the world. Well-known domestic brands include: Yuan Heng Photoelectricity (yaham), skymax-display, aled, liantronics, MejLed, dicolor, Liansen, lhgd, TOP and so on.
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