Displays will reflect the outside world is a matter of objective information (optics.s Electrical. Acoustic, chemical, etc.), after transform, in an appropriate form of (mainly images, graphics, digital, characters) to show for People watching, analysis, the use of a technology. Now the so-called display technology, known as electronic information display technology, it is built on the optical, chemical, electronics, mechanics, acoustics, and so on the basis of science and technology with some degree of integrated technologies. The application of electronic display technology and research involving a wide range, including the luminescence of luminous materials research, experiment; various display the basic principles and structure, the materials used and the choice of devices and the production process ; Show that the input of information, transform, process and control, and so on. With the development of science and technology, along with economic, military, social development and peoples lives, the kind of information

Type and quantity continue to increase. People living in the information of the meeting, all the time get some information. Research shows that access to the information that nearly 2 / 3 through the eyes. And display technology, it is important for people providing a wide range of information a window; and, conceivably, display technology is also available in the developing world is extremely broad. Application of Technology has a very wide range, in stadiums, large-screen display system can show live games and game results, such as time in the transport sector, can show performance in the financial sector, can display real-time financial information, such as stocks, Such as the exchange rate in the commercial telecommunications systems, customers can show to the general notice, news, advertising and so on. Technology can also widely used in industrial and agricultural production, military, medical units, public security system and the aerospace industry, such as the national economy, social life and military fields, and play an important role.

LED display applications

Rosoff (Lossew o. W.) Discovered in 1923 in the semiconductor SiC accidental formation of P-N-node in the launch, using the P-N semiconductor junction electroluminescence principle made of light-emitting diode Only to the late 1960s to develop rapidly. In recent years, semiconductor production and processing technology to gradually mature and perfect, light-emitting diode

(LED: Light Emitting Diode) has been growing in solid display of dominant position. LED has received extensive attention and rapid development, and it is by itself has the advantage inseparable. These advantages can be summarized as: high brightness, low voltage and power consumption of small, small and easy match with the integrated circuit, driving a simple, long life, impact resistance and stable performance. LED extremely broad prospects for development, which is now in the higher brightness, higher climate of tolerance, a higher density of light, a higher luminous uniform, reliable, full color and direction. By the different composition of semiconductor materials and can be sent to different colors of LED crystallization point. Currently the most widely red, green, yellow LED. And pure green and blue LEDs development has reached a practical stage. From the show side, LED can display text, numbers (of digital), can also display graphic images (LED matrix module), from applications, LED display that can be used in the indoor environment, can also be used for outdoor environment.

History shows that the evolution of methods

The traditional incandescent lamp, unable to overcome their power consumption, short life of the defects, neon lights, advertising light boxes, advertising signs, such as flat although colourful, but changes in monotone, can not play video ads; magnetic flap although the aid of assembly Simple patterns, but do not have the light source itself, the effect of the use of night differential. In recent years, with the micro-electronics technology, automation technology, computer technology is developing rapidly, increasing maturity of the semiconductor production process, resulting in LED display point size getting smaller and smaller, more high-resolution, which can be revealed that the three-color (red , Green, blue) to recover Chengquan color effects, making light-emitting diode (LED) display as the growing scope of application. From the future development trends, currently has a video effect of several media, great deal of diversity among its performance advantages: the cathode tube (CRT) or quartz tube (DV) large-scale television costs very expensive, and often can only be 37 inches, the volume will be re - Be limited. And the need for large screen in the indoor use, the results are satisfactory. Color liquid crystal display (LCD), the same is expensive, complicated circuitry, the area can not be too great, but the perspective of the impact of very large, very small viewing angle, but the delicate screen, depending on good sense. Map projection equipment (Projector), brightness of small, poor resolution (screen-by uneven). However, the advantage of easy installation, maintenance simple. TV wall (TV-Wall), the surface of Boundary, visual sense of a foreign body, and outdoor applications -