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LED is a light emitting diode light-emitting diode abbreviation, referred to as LED. LED display (LED panel
) By a certain control, used to display text, text, graphics, images, animations, quotes and other information as well as television, video signal by the LED
Array consisting of display devices. As a new generation of display media, has been widely used in the exhibition center, trading center, the auction center, financial center, information center, securities, telecommunications, taxation, power supply, customs, courts, fire, railway stations, airports, docks, and other talent market Hall of business in public places.
Simply put LED display is a combination of splicing by the number of available display unit (display unit display board or box unit) constitute a screen body, coupled with a suitable controller (control board or control system). Therefore, a variety of specifications display panel (or unit cabinet) with different control technology controller can be composed of many kinds of LED display, to meet different environment, different show demands and needs. Careful decomposition of an LED display, which consists of the following elements constitute (a more complex synchronous video screen, for example):
① metal structural framework; indoor screen is generally made of aluminum alloy (aluminum or aluminum square tube angle) in the inner frame, equipped with display boards and other boards as well as switching power supply, outside the frame with brown aluminum square tube, stainless steel or aluminum alloy, or made of sheet metal integration. According to screen outdoor screen frame size and body angle or load-bearing capacity is generally I-beam structure, aluminum composite panel frame can be decorated.
② display unit is the main part of the display, by the light-emitting materials and drive circuit. The internal screen is all kinds of household unit display board, outdoor display is the unit box.
③ scan control panel of the board's function is to buffer the data to produce a variety of scanning signals and the duty cycle control signal gray.
④ 220V AC switching power supply will become available to a variety of DC circuits.
⑤ twisted pair cable master device generates the display data and various control signals from the twisted-pair cable to the screen body.
⑥ main controller will enter the RGB digital video signal buffer, gray-scale transformation, re-organize and produce various control signals.
⑦ dedicated graphics card and multimedia card; addition to the graphics card's basic functions, but also simultaneously output RGB signals and digital horizontal and vertical, blanking signal to the master instrument. In addition to these multimedia functions can also be input analog Video signal into a digital RGB signals (ie video capture).
⑧ computer and its peripherals
⑨ other sources of information; TV, DVD / VCD machine, camcorder and switch matrix and so on.
