1、 附 录 （一）外文资料原文 Large-screen display systems research - Ja now R H. Large-screen display system: U.S. Patent 5,394,198P. 1995-2-28. Led development along with computer technologys high speed development, LED (Light Emitting Diode) the screen display system takes after the television, the broadcast, t
2、he newspaper, the magazine “the fifth big media” marches into the social life fast each aspect. Its collection microelectronic technology, the computer technology, the information processing and management technology in a body, may the information through the writing, the design, the animation and t
3、he video frequency four forms demonstrates. With media and so on bank of television monitors, magnetism vane compares, the LED large screen display system has the design to be artistic, the color is sharp； The design, the color change are rich, are fast； The low power loss, the long life, the use co
4、st low, work stably reliable and so on characteristics. It demonstrated the chart article angle of view is big, the apparent distance is far, thus has widely applied in the large-scale square, the commercial advertizing, the sports complexes, the information dissemination, the news issue, the securi
5、ties trading； It also applies in the industrial control and the industry reassignment system, is advantageous each kind of parameter, the alarm point, the technical process demonstrates clearly perfect, may satisfy the different environment the need. The LED display monitor is one kind of use comput
6、er and the complex digital signal processing electron advertisements propaganda screen. Its screen body part by the microprocessor (is mainly monolithic integrated circuit) and the driving circuit control movement, demonstrated the image or the writing obtain by the computer edition software editor.
7、 Because the LED display monitor this kind of new generation information graphic display device has the demonstration design to be stable, the power loss is low, life long and so on characteristics, moreover it synthesized each kind of information graphic display devices strong point, and has overco
8、me own insufficiency, because specially a display monitor may demonstrate that the different content, the display mode is rich. Therefore in the public area, it has the intense advertisements propaganda and the information transmission effect, already in the solid demonstrated day by day occupies th
9、e dominant position. The LED display monitors prospects for development are extremely broad, at present toward the high luminance, a higher weather fastness, the higher luminous density, the higher illumination uniformity, the reliability, the panchromatic direction is developing. Is composed of the
10、 different materials semiconductor can send out the different color the LED crystal spot. At present what applies is broadest is red, the green, yellow LED. But the blue color and the pure green LED development had already achieved the practical stage. LED display monitors classification LED display
11、 monitors classified LED display monitor is many kinds of technical synthesis application product, involves photoelectronics, the semiconductor device, the digit electronic circuit, the large scale integrated circuit, the monolithic integrated circuit and the microcomputer and so on each aspect, bot
12、h has the hardware and to have software . After the LED display monitor is takes the broadcast, the television, the newspaper, the magazine another new communication media. At present the LED display monitor basis uses the place to be different, may divide into the outdoor screen and the indoor scre
13、en two kinds, its main difference is photo tubes illumination brightness is different. But acts according to the content which demonstrated different also to be possible to divide into the image screen and the writing screen two kinds, the image screen may the display image as well as multimedia, bu
14、t writing screen main demonstration writing or simple fixed image. Display images multimedia outdoor screens are the investment huge (reaches as high as several millions) the large-scale upscale equipment, main application in large-scale public place, image project and some important places. The LED
15、 display monitors application involves to social economy many domains, already spread the transportation, the negotiable securities, the telecommunication, the advertisement, the propaganda and so on each aspect. LED display monitors trend of development At present the LED display monitors demonstra
16、tion to the high luminance, a higher weather fastness, the higher illumination uniformity, a higher reliability, the panchromatic, the multimedia directions develops, systems movement, the operation and the maintenance also to the integration, the network, the intellectualized direction develop. The
17、 21st centurys display technology will be the panel display time, the LED display monitor takes one of panel display leadership products to have a bigger development. 1. since the high luminance, entire color blue color and the green superelevation brightness LED product has appeared, the cost reduc
18、es fast year by year, causes the LED entire colored display monitor product cost to drop, the promoted speed speeds up. At the same time, along with control technologys development and the LED display monitor body stable enhancement, the entire colored LED display monitors brightness, the color, whi
19、te balanced achieves the quite ideal effect, definitely may satisfy the outdoors all-weather environmental condition request, moreover the image is clearer, is more exquisite, is sharper. 2. after standardization, standardized material, technology mature and market price basic balanced, the LED disp
20、lay monitors standardization and the standardization will become a tendency which the LED display monitor develops. In recent years industry in development, after several price recedes the adjustment achieves basically balanced, the product quality, the system reliable and so on will become the main
21、 competition factor, this had the high request to the LED display monitors standardization and the standardization. Profession standard and standard systems formation, IS09000 series standard application, causes the LED display monitor profession the development tends the order. 3. the product mix d
22、iversification along with the information societys formation, the information field is even more widespread, the LED display monitors application prospect is broader. It is estimated that large-scale or the ultra-large LED display monitor will have the change for the mainstream products aspect, will suit can have in the service industry characteristic and the specialized request small LED display monitor enhances greatly, will be richer face the information service domains LED display monitor product class and the
