Led display is the 20th century, 90 years of new flat panel display device, because of its high brightness, clear picture, colorful, it is in the public multimedia display field thriving, so the market space is huge.
Led display market
With the development of technology and climb
Led display development can be divided into the following stages: the first stage from 1990 to 1995, mainly monochrome and 16 color graphics screen. Used to display text and simple pictures, mainly used in stations, financial securities, banks, post offices and other public places, as a public information display tool.
The second stage is from 1995 to 1999, there have been 64, 256 gray-scale dual-color video screen. Video control technology, image processing technology, optical fiber communication technology applications such as led display will be upgraded to a new level. Led display control dedicated large-scale integrated circuit chip is also at this time by the domestic enterprises to develop and be applied.
The third stage from 1999 onwards, red, pure green, pure blue LED tube into the large number of China, while domestic enterprises carried out in-depth research and development work, the use of red, green and blue production of three-color LED full color display is widely used, A large number of sports venues, convention centers, squares and other public places, which will be the domestic big screen into the full color era.
With the rapid development of LED raw materials market, surface mount devices from 2001 available, mainly used in the indoor full color, and its high brightness, colorful, low temperature characteristics, free to adjust the point spacing, Accepted, in just two years time, product sales have more than 300 million yuan, surface mount full color LED display application market into the new century. In order to adapt to the 2008 Olympic Games "thin" program, Li Yade developed a surface-mounted dual-color display, a large number for the training hall and the game chronograph system. In the Olympic venues full color, for the tight investment, most of the full color screen can be used to remove the way, the Olympic Games can be used as a live broadcast tool, after the event can be used for leasing, as a show, national policy release and other public application tools, Way to recover costs as soon as possible.
In terms of the market, China's accession to the WTO, the success of Beijing's bid to become a new opportunity for the development of LED display industry. The domestic led display market continues to grow, the current domestic market, domestic led display market share of nearly 95%. International led display market capacity is expected to grow at an annual rate of 30%.
At present, led display of the major manufacturers concentrated in Japan, North America and other places, China's LED manufacturers export share in which negligible. According to incomplete statistics, the world currently has at least 150 manufacturers to produce full-color screen, which products complete, the larger companies about 30 or so.
Domestic led display
Where is the technology gap?
With the LED display market continues to expand, the current full-color market is gradually divided into three grades. The first file for the Barco, Panasonic and other well-known international production of high-end products; second gear for the domestic large-scale enterprises developed by the use of high-quality LED production products; third gear for the production of LED production of our display. These three grades of led display in the price and function there is a big difference.
In the technical, led the development of the display to keep up with the quality of world-class enterprise characteristics, the current domestic high-quality led display and foreign top products in image processing technology, front-end video processing technology, the difference is not the main difference lies in the following Two aspects:
Single point color confirmation
"Single-point color confirmation" technology to ensure that the vivid color display, sustainable for several years unchanged.
At present, the domestic product can only do the unit module and the unit box adjustment, can not do the real single point of regulation, so there is a difference in color and brightness consistency, especially after the replacement of the display unit after maintenance, Of the parameters may have changed, the display is difficult to keep the same with the original screen, and this work is done by a large foreign equipment, and there is no such products due to the characteristics of the development of equipment, but also hope that the community-related industries And equipment manufacturers can give attention.
The current work in the Barco Gade is to do so: the module, each pixel in the LED lamp has its own color, brightness of the value of these light-emitting diodes in the factory are to be accurately measured (DIGITIZER) will read this information from each EEPROM and correct the brightness and color differences of the LEDs when the display signal is processed, and the data is stored in the EEPROM at the same time. , To ensure that the display is consistent with the best condition.
Structural process
At present, the shell of the domestic products are basically a single sheet metal processing, poor processing technology, the accuracy is not high, the appearance is not beautiful, waterproof is not very good, especially in the harsh outdoor environment, easy to cause system instability The
Barco's cabinets are suitable for harsh working conditions, and the external hardware of all enclosures is housed in an aluminum alloy package with IP65 standard. The special sealing measures used in the box are sufficient to prevent rain and dust from entering. The number "5" is to prevent the penetration of the liquid level, but also one of the design requirements, so that the system can be in the rain, no water environment to work properly.