With the progress of high-brightness light-emitting diodes and multicolor, and applications are also expanding. From below the lower flux LEDs to display, then the display from outdoor to moderate flux power lights and special white light source lighting, and finally development to the upper right corner of the high flux general lighting source. 2000 is the dividing line time in 2000 have been resolved for all colors and lighting signal display problem issues, and has begun a low, special lighting applications in flux, and as general lighting The high luminous flux white lighting applications, it seems that some time before, the need to improve in order to achieve further significant flux. Of course, this is a process, with the brightness increase and prices will decline gradually. 1. LED display Since the mid-1980s, there are monochromatic and multicolor displays come out, initially text screen or movie screen in the early 1990s, the development of computer technology and integrated circuit technology makes LED video display technology to achieve, TV images directly on the screen, especially in the mid-1990s, blue and green high brightness LED successfully developed and put into production quickly to make room external screen applications greatly expanded in the area ranging from 100-300m. Currently the LED display in stadiums, Square, the venue and even streets, shopping malls have been widely used, full-color US NASDAQ on Times Square, the most famous of the screen area of 120 ft × 90 ft equivalent to 1005m, the 19 million ultra-bright blue, green The red LED is made. In addition, the securities market screen, bank rate screen, screen, and other aspects of application rates also accounted for a large proportion of recent highway, the information screen aspect Viaduct also have a larger development. In this light-emitting diode Applications become the size of the field, the formation of new industries, and can expect a more stable growth. 2. Traffic lights Beacon light uses LED as the light source for many years, the present work is to improve and perfect. Road traffic lights has made considerable progress in recent years, rapid technological development, rapid application development, China currently has orders for about forty thousand units per year, And in California in the last year on the use of LED traffic lights replaced the traditional source of 50,000 sets of lights, according to the use effect, long life, energy saving and maintenance-free effect is obvious now use LED emission peak wavelength of 630nm red yellow 590nm, Green 505nm. It should be noted that the drive current problem should not be too large, otherwise high temperatures in the summer sun will affect the life of LED. Recently, as applied to airport beacon light, flood light and LED omnidirectional light signal lights airport also has been successful and put into use, multi-reflecting good results. It has independent intellectual property rights, granted two patents and reliability saving electricity, maintenance-free, could be applied to a variety of airports, has been used for decades replace old lights, not only high brightness, but also because of good LED light color purity, particularly distinctive, easy signal identification. Railway traffic light variety series due more intensity and perspective requirements also vary, is now stepping up research, it is estimated will gradually successfully developed and put into use, the amount of view, but also a considerable market. 3. The vehicle lights Super bright LED can be made into a car brake lights, tail lights and turn signals, the instrument can also be used for lighting and interior lighting, it is shock-resistant, energy saving and long life than the incandescent lamp has a distinct advantage. Used as brake lights Its response time is 60ns, than incandescent 140ms many shorter traveling on a typical highway, will increase the safety distance 4-6m. The LCD backlight LED as a backlight LCD, which not only can be used as green, red, blue, white, color can also be used as a backlight, there are many products into production and application stage. Recently, on the phone LCD screen with LED backlight production , enhance the quality of products with good results. using eight blue backlight 24 green, 32 red LuxeonLED made 15in (1in≈2.5cm) LCD screen, you can reach 120W, 2500 lm, luminance 18000nits (Bennett, cd / m2) .22 LCD backlight also been made, only 6mm thick, only good mixing effect, color rendering index of 80 or more. At present large-scale backlight, although in the development stage, but great potential . 5. Lighting Since the fall of the light emitting diode brightness increase and prices, coupled with long-life, energy-saving, easy to drive and control than the neon lights, not only can flicker, can change color, so use made of ultra-high brightness LED monochrome, multicolor and even hair color landscape project with other shapes of colored light beam emitting unit, decorative tall buildings, bridges, streets and squares and other good effect, vivacious and colorful, starry and Streamer scene. there are many production units LED beam of meters above, the tens of thousands of lights, is currently being phased in, it is estimated will be gradually expanded to form a separate industry. 6. lighting LED light source as a light source should be white, white LED light source classified as shown in Table 3, the current military as white LED lighting, there are some varieties into mass production. Since the LED light source no infrared radiation, easy to conceal, plus it vibration resistant, suitable for battery-powered, and portable structure solidified, etc., will have greater development in terms of special lighting as folk used lawn lamp, buried lights has been the scale of production, but also used as a microscope, as the field lighting, flashlights, headlights surgeon, museum or exhibition of lighting and reading lamps. With the decline in luminous flux and the price increase, the application surface will gradually expand in order to complete the transition to general lighting special lighting estimated 2005-2010 years will enter the general lighting.