LED display profile

LED display is the collection microelectronics technology, optoelectronic technology, computer technology and information processing technology in one large display system. With its colourful, dynamic range, high brightness, long life, work stable performance and increasingly show media in the workforce, widely used in advertising, securities, information dissemination, press conference, etc., is the international extremely advanced show media.
Led electronic display panel) is led through certain control method, used to display text, graphics, video, animation, video, video signal market, various information led display screen device array consisting of.

The development history of the display method
The traditional white product lamp, can't overcome its power, the defects of short service life, neon lights, advertisements, graphic signs advertising, but although colour changes of xian monotonous, couldn't be more video image advertising; play Magnetic counterpart although can be borrowed computer assembles the simple pattern, but oneself do not have hair illuminant, nightly use effect is poor. In recent years, along with the microelectronics technology, automation technology, the rapid development of computer technology, production process and the application of new materials update that LED chips brightness, life got breakneck development, thus makes its application field increasingly broad, the LED display market get considerable development. 93 years, ultra bright blue, red and green glowing tube appearance, make achieve true color displays become fact, outdoor screen get people love, especially in stadiums, advertisements, news and other areas of become more widely used. Look from future development trends of video effects, currently has several media, its performance advantage each has his strong point:
The cathode tube (CRT) or quartz tube (dv) large TV: cost is very expensive and usually can only do 37 inches, volume again big will is restricted, don't need large screen and indoors when using, results are ideal.

Color LCD display (led) : the same is expensive, circuit complex, area cannot too big, and the influence of by Angle is very large, visible Angle is small, but the picture is exquisite, visual feeling good.

Image projector equipment (projector) : brightness is small, legibility poor (picture uneven) by light, the advantage is convenient installation and easy maintenance.

TV wall (TV - wall) : the surface has rules, on the vision foreign body sensation, outdoor application effect is poor, not on brightness for representing text, but indoor performance when TV screen effect is good.

Led space limitation is lesser, and can be designed according to user's requirements of display size, with full color effects, the perspective of the characteristics of big, can say words, design, image (including animation and video).

Our rapid economic growth, the spread of information to more and high demand. Can believe that led electronic display with its colorful, display information, long life, power consumption is small, light weight, small size, high stability, space, easy to operate, easy to install and maintain the characteristics in social economic development will play more and more important role. Must view, the led screen in today's show media, highest cost-effective, is your best choice.

Leds display applications
ROM. Plug lossew. Cardiff o.w in 1923 discovered accidentally formation of semiconductor sic "(n, but use light emission of semiconductor p - n" electroluminescent principle of light-emitting diodes just made late by 1960 was able to develop rapidly.

In recent years, due to the production and processing technology of semiconductor maturity and perfection, light emitting diode (led emitting diode) over already, in solid display is dominant.
Led by extensive attention and the rapid development, is with its advantages of itself inseparable. These advantages summarized up is: high brightness, working voltage, low consumption, miniaturization easy and integrated circuit matching, drive is simple, long life, impact resistance, steady performance. The led, currently the development prospect towards a higher brightness, higher resistance to climate sex, higher luminous uniformity and higher reliability, full-color change direction.

Because the material is different and semiconductor emits different colour can be obtained the led chip.

Video display system and vlsi programmable integrated chips
Video display of traditional method to realize the small-scale is discrete integrated circuit technology. When the system performance large-scale increase (such as 16 levels increased to 256 levels gray-scale gray), such technology will seriously affect system reliability and maintainability. Gray level increase, with the increase of quantity of data, have to take more complex, more abundant small-scale discrete components, this will make the system reliability and maintainability is very difficult to guarantee. In addition, naked eye and instrument distinguish displaybeleuchtung auf poor feel different, naked eye on low brightness of high brightness differential sensitive, differential not clear distinction. This requires devices to led nonlinear visual correction, compression low differential, expanding high brightness brightness, make the actual display of differential with gray level degree sent naked eye physical sensation. This method will increase the difficulty and the computation, computing will be more complex circuit design.