The LED display is in the late 1980s in global rapidly develop new display products, with high reliability, high brightness, long service life, environment adaptiveness, line, price ratio is high, low consumption, impact resistance, steady performance characteristics, such as rapid growth of flat panel display the mainstream products.
China LED display industry started in the early 1990s, development is rapid, Since the 21st century, the LED display industry is facing the good market development opportunity, On the one hand, demand is expanding constantly, e-government, public affairs and public information showing strong demand; etc. On the other hand, technological progress for the LED display product market expansion and create a new application field provides innovative technical support, on the other hand, the Olympic Games and the world expo, speeding up the opportunity of the development of the industry. According to the market analysis report 2007-2010, China LED display market average annual compound rate will reach 15.1%.
The LED display the biggest characteristic of its manufacturing from area restriction, can reach dozens or even hundreds of square meters, applied to all kinds of indoor and outdoor public displays text, graphics, animation, video image, image, etc. Various kinds of information, and has strong advertising rendering force and shock strength. Its high brightness, full-color melt, the convenient fast error detection and LED the luminosity of the free adjustment is the development of the market trend.
First, the LED display classification
1, LED screen according to use environment into indoor LED screen and outdoor LED screen.
2, the LED screen according to display color divided into the single color LED screen, double colors LED screen and full-color LED screen.
3, LED screen by gray level and can be divided into 16 and 32, 64, 128, 256 level gray LED screen etc.
4, LED screen according to display performance is divided into text LED screen, graphic LED screen, synchronous video LED screen, television video LED screen etc.
Second, LED display system component architecture
1, metal frame: indoor screen by aluminum alloy (Angle aluminum or aluminum square tubes) constitute internal frame, carrying show board, etc. Various kinds of circuit boards and switching power supply, tea-colored made by aluminum alloy frame.products outside. Outdoor screen frame according to screen body size and bearing ability for steel structure, the casing outside or choices can adopt aluminum-plastic plate undertakes decorating.
2, display element: this is the main part of the LED display screen, by emitting materials and drive circuit constitutes. Indoor screen is various specifications of the element display board, outdoor screen is unit housing.
3, the main controller: action is the input RGB digital video signal buffer, grayscale transform, reorganized and produce all sorts of control signals.
4, switch power usage is 220V alternating current into various dc provide various circuit.
5, transmission cable: master meter produce display material and all kinds of control signal by twisted-pair cable transmission to screen ontology.
6, scanning controller: the circuit is the function of material buffer, produce all sorts of scanning signals and occupies emptiescompared grayscale control signals.
7, special video display adapters and multimedia card (CARDS) : LED a full color special display card besides have the basic function of computer display adapters outside, still simultaneous output signal and line digital RGB games, vanishing etc signals to the master meter. Multimedia card besides above the functions can also the input analog Video signals into digital Video signal (i.e. RGB acquisition).
