點(diǎn)陣led外文翻譯---基于at89c52的led概述-文庫吧
2025-04-16 21:34 本頁面
【正文】 e. Now, the InGaN / YAG white LED, YAG phosphor by changing the chemical position of the phosphor layer and adjust the thickness of the 350010000 K color temperature can be colored white. This blue LED through the method by white, constructed simple, lowcost, high technology is mature, so use the most. In the 1960s, the use of science and technology workers semiconductor PN junction of The principle of developing a LED lightemitting diodes. At that time, the development of LED, the materials used are GaASP, its luminous color is red. After nearly 30 years of development, and now we are very familiar with the LED, has been sent to red, orange, yellow, green, blue, and other shade. However lighting necessary for white LED light only in recent years to develop, readers here to tell us about lighting with white LED. The LED display screen and video display into the text by LED matrix blocks. Graphic display can be displayed with puter, English, Chinese text and graphics, Video screen using microputer control, graphic, image, with realtime, synchronization, clear information dissemination way play all kinds of information, but also shows 2d, 3d animation, videos, TV, VCD programs and live. The LED display screen display bright colors, stereo sense is strong, such as oil, such as films, widely used in finance, taxation, industry and merce, telemunications, sports, advertising, corporations, transportation, education system, station, port, airport, hospital, shopping malls, hotels, Banks, securities market, market, and construction management of industrial enterprises, Christie39。s and other public places. The LED display can display the change of digital image。 text, graphics, Not only can be used for indoor environment can also be used in outdoor environment, projectors, LCD TV wall, and the inparable advantages. LED by the wide attention and rapid development, and it is the advantages of itself. These advantages in is: high brightness, working voltage, low consumption, miniaturization, impact resistance and long service life and stable performance. LED the development prospect, is currently towards a higher brightness, higher resistance to climate, higher and higher light shine density evenness, reliability, the direction of development. Fullcolor The classification of the LED display 1, the color can be divided into gezer The single color display: single colors (red or green). Double colors: red and green screen, double colors gray, can show 256 levels 65536 colors. 3 Fullcolor display: red, green, and blue, gray level 256 gezer fullcolor display screen can show more than 1,600 colors. 2, according to the classification of display devices LED digital display: display device for seven yards, suitable for making the clock display screen, interest rates, digital electronic display screen. Pictures of LED dot matrix LCD display device is posed of many: evenly posed of light emitting diode matrix display module, suitable for broadcast text, images of information. LED video display: display device is posed by many lightemitting diodes, video, animation shows various video files. 3, by using occasions classification Indoor display: light point is lesser, general Φ 3mm Φ 8mm, display area of general several ten square meters to. Outdoor screen area to several hundred square meters general dozens, high brightness, can work under the sun, in the wind, rain, waterproof function. 4 points, according to the classification of light in diameter Indoor screens: Φ 3mm, Φ mm, Φ 5mm, Outdoor screen: Φ 10mm, Φ 12mm and Φ 16mm Φ, 19mm, Φ 20mm, Φ 21mm, Φ 22mm, Φ 26mm The basic unit of the light outdoor screen for led light cone tube, the principle is a group of red, green, and blue
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