Origin of LED display

　　LED: Light emitting diode. The diode used to control the display mode of the semiconductor light emitting diode is a diode made of a compound of gallium (Ga), arsenic (As), phosphorus (p), nitrogen (n), and indium (In). When the electrons and holes are combined, they can emit visible light for manufacturing light emitting diodes. Indicating lamps or configuration letters or numbers in circuits and instruments. Gallium arsenide phosphor diode is red, gallium phosphate diode is green, silicon carbide diode is yellow, and indium gallium nitride diode is blue.

　　As early as 1923, when Lossen. ow was studying the semiconductor SIC, he had not yet developed the light emitting diode (LED). The method was to light up the PN junction in the presence of impurities. The display technology developed rapidly, especially in the 1960s. PDP plasma display panel, LCD LCD display, light emitting diode (LED), electrochromic display ECD, electrophoretic display EPID and other new display technologies were developed. However, with the maturity and improvement of semiconductor fabrication and processing technology, led displays gradually occupy an advantage.

　　Connected LEDs and the reason for focusing on rapid development itself have many advantages. For example, the market prospect of high brightness, low operating voltage, power consumption, easy integration, simple drive, long life, impact and stable performance is very broad. Now it has developed into high brightness LED, high weather resistance, optical density, uniform light emission and full-color.

　　In the early 1980s, CGA provided four resolutions of 320 * 200. Within 10 years, CGA, EGA, VGA, SVGA, and super resolution developed, and display accuracy developed from 320 to 1600 * 200 * 1250. From four colors to the form of 32 bit display of reduced light, developers need large screen mobile devices to receive signals from the host. The working principle is that there will be a similar display device - projector. However, it is not available at high brightness, so LED displays (screens), LED displays, large viewing angle, high brightness, and bright colors. In addition to technology, LED display has a wide range of applications, such as stadiums, roads, shopping malls, outdoor advertising, etc.

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