with the progress of science and technology, led display screen is also used more and more widely, and the technology content is also higher and higher, because it has many advantages. so do you know where it came from? if you want to know, this article will tell you about the past and present life of led display.
what is an led display?
led display is a flat panel display, which consists of a small panel of led modules.
led: light emitting diode. it is a kind of diode made of ga and arsenic (as), phosphorus (p), nitrogen (n), indium (in) compounds by controlling the display mode of semiconductor light-emitting diodes. when electrons and holes recombine, it can emit visible light, so it can be used to make light-emitting diodes. in the circuit and instrument as an indicator light, or constitute a text or digital display. gaas phosphor diodes emit red light, gaas phosphor diodes emit green light, sic diodes emit yellow light, indium gan diodes emit blue light.
(light emitting diode)
origin of led display screen?
as early as 1923, when lossen. ow studied the impurities in semiconductor sic, the bright emission of pn junction and the development of light-emitting diodes (led: light-emitting diodes) never took it seriously. with the rapid development of electronic industry, especially in the 1960s, display technology has developed more rapidly. people have developed laser display pdp plasma display panel, lcd liquid crystal display, light emitting diode (led), electrochromic display ecd, electrophoretic display epid and other new display technologies. however, due to the maturity of semiconductor fabrication and fabrication technology and the improvement of led display, it has become more and more dominant and stable.
why focus on connected led and rapid development, because it has many advantages. for example: high brightness, low working voltage, power consumption, easy integration, simple driving, long life, impact resistance and performance stability, its market prospects are very broad. now it has developed to a high brightness led, high weatherability, light density, uniform luminescence, full color.
in the early 1980s, with the development of computer, cga showed four colors with resolution of 320 * 200. in just 10 years, cga, ega, sega, vga and svga have gone through the development of ultra-high resolution. the development of display precision ranges from 320 to 1600 * 200 * 1250, from four colors to 32 bits of true color and scanning frequency. from 15.7k to 150k. in the form of reduced light, as developers need a large screen mobile device to receive signals from the host, the working principle is that there will be a projector similar to it. however, for the reason of its own brightness, in the case of high brightness, can not be used, so there are led display (screen), led display, large viewing angle, high brightness, brilliant color and so on. with the development of science and technology, led display has a wide range of applications, such as in sports venues, highways, shopping malls, outdoor advertising and other places.
what kinds of led display screen have been developed so far?
with the development of science and technology, led displays can be divided into five categories, they are:
1. small spacing led display, its characteristics are: ultra-clear, low gray, high brush, power saving, no ghost.
2. indoor led display, its characteristics are: clear, seamless, wireless intelligence.
3. outdoor led display, its characteristics are: stable, high-speed, energy-saving.