Where does the LED display come from?
As early as 1923, Lossen.o.w (Lossen.o.w) had light emission in the impurity P-N junction when studying semiconductor SIC. The light-emitting diode (LED: Light Emitting Diode) that was developed has never received much attention. With the rapid development of the electronics industry, especially during the 1960s, display technology has developed more rapidly. People have developed PDP laser display plasma display panels, LCD liquid crystal displays, light emitting diodes (LED), electrochromic display ECD, electrophoresis Display a variety of new display technologies such as EPID. Due to the gradual maturity and improvement of semiconductor manufacturing and processing technology, light-emitting diodes have become increasingly dominant in solid-state displays.
The reason why LED is widely valued and developed rapidly is because it has many advantages. For example: high brightness, low operating voltage, low power consumption, easy integration, simple drive, long life, impact resistance and stable performance, etc., and its market prospects are extremely broad. At present, LED has developed to high brightness, high weather resistance, luminous density, luminous uniformity, and full color.
In the early 1980s, with the development of computers, the CGA display method came out. It has four colors with a resolution of 320*200. In just 10 years, the display method has experienced CGA, EGA, SEGA, VGA, SVGA, Towards ultra-high resolution, the display accuracy has evolved from 320*200 to 1600*1250, from four colors to 32-bit true color, and the scanning frequency has evolved from 15.7K to 150K. The working principle of the display is to restore the signal from the host to display it in the form of light. With the development, people need a large-screen device, so a display device similar to a projector appears. However, due to its own brightness, it cannot be used in a high-brightness environment, so LED displays (screens) have appeared again, which have the characteristics of large viewing angles, high brightness, and colorful colors. With the development of science and technology, LED displays have been widely used, such as in stadiums, highways, large shopping malls, outdoor advertising and other places.
According to surveys, two-thirds of the information people receive is obtained through eyes. Display technology is also used in the national economy, social life and military fields such as industrial production, military, medical units, public security systems and even aerospace, and plays an important role. Display technology has become an indispensable part of modern human social life. technology.
