Green LED applications is introduced

LED light-emitting principle: LED light-emitting diodes (leds), 发光二极管) Is the use of diode within the electrons combine with gaps in the process of energy conversion of light output. LED features: cold light does not produce heat, long life elements. ( Hundreds of hours) , reaction speed, small size, low consumption, suitable for mass production, high reliability. LED materials usually Ⅲ - such as arsenic, phosphorus, gallium Ⅴ group elements, the production process including wafer production, epitaxial growth of the upstream, midstream of diffusion process, metal vapor deposition, grain production, and downstream products such as packaging and application market. LED can be divided into visible light (market profile: 450 ~ 780海里) And invisible light, brightness in the visible part of the traditional product is mature, production is big, but because of the low price value is not high, compound annual growth rate is only 10%; High brightness LED is the current mainstream products, mainly used in the large kanban, traffic signs, back light, automobile third brake light. More mature AlGaInP ( Red, orange, yellow) Wide application, patent problem is not big, the price is nearing, brightness and traditional application field. At present the most popular GaInN ( Blue, green) Products, in recent years, under the blue back light mobile agitation strong demand, products are overwhelmed. GaInN + phosphor ( The white light) Is mainly used in lighting, because the blue light breakthrough global companies have to white light lighting research and development, combined with full-color mobile phone popular recently, make the white light back light hot, if there is progress, future technology will gradually replace the general lighting market, has a huge business opportunities. In the aspect of invisible light, mainly used in the infrared ( 850 ~ 950海里) And optical communication ( 850 ~ 1550海里) Areas, because the input is higher, technical difficulty is big, the price of the product and the gross profit margin is better also, the market is the United States, Japan, Europe and other large broken situation. According to the Strategies of Unlimited estimates, 1998 world visible light LED production, with 10. 400 million dollars and 54. 1% of the share of the highest; The second is 3 in Taiwan. $4. 6 billion, 18% of the share, the United States to 16. 5%, 3. $1. 8 billion, ranking the third; Europe has output value 200 million dollars, and ten. 4% share. LED application LED application field is very wide, including communications, consumer electronics, automotive, lighting, lamp, etc. , can be roughly divided into back light, lighting, electronic equipment, display, automobile and so on five big areas. Within 1, auto parts: by car USES include dashboard, speakers such as light, and the automobile external ( The third around the brake lights, tail lights, turn signals, etc. ) , at present Europe series cars including audi, BMW, fox and so on brand all series USES high brightness LED, in a garage, Toyota will also take the lead in the dashboard's back plate with high brightness LED to other factories, new car is being used. If coupled with front and rear lights, brake lights, traffic signs, etc. , related to transportation market, a huge business opportunities. In terms of traffic sign light market, around the world has 20 million traffic signal lamp, if updated annually 2 million, business can continue for 10 years. Part 2, back light source: mainly mobile phone backlight source, is the biggest market of SMD type product applications. Although cell phone in the past two years has significantly slow growth rate, but there are still 400 million level throughout the year, to the LED back light 2 to 1 cell-phone, keys 6 SMD LED meter, conservative 400 million phones a year needs about 3. 2 billion leds. South Korea recently blue backlighting mobile phone, the blue LED market in short supply, evident in the mobile phone market in LED application still occupies important position. After the blue cell phone market, now is color screen mobile phone. Color screen mobile phone is a high-end products, main components prices this year, however, makes the color screen of mobile phones and monochrome spreads narrowed, coupled with the manufacturer's strong marketing, mobile HuanXing tide is afoot. Moreover in PDA, DSC two emerging products will enter full color phase, has significant business opportunities. 3, display LED display as a new display media, with the rapid development of large scale integrated circuit and computer technology, the rapid development of it with the traditional display media, colorful neon lights, pixel tubes TV wall, four-color magnetic flap, compared with its high brightness, good effect of dynamic image display, less failure, low energy consumption, long service life, way of display content diversity, rich and high cost performance advantages, has been widely used in all walks of life. 4, electronic equipment and lighting, LED by its low power consumption, small volume, long service life, has become a light is the first choice of various electronic equipment, now almost all the electronic devices have LED. LED lighting has been gradually to the commercialization of the initial development stage, but there is still room for improvement on service life and price. Forecast according to the manufacturers, the fastest in 2004, the white LED luminous efficiency can reach the same as the 20 W fluorescent tube 60 lm/W, and in 2010 to 100 lm/W, 40 W enough to replace the fluorescent tube. As to the unit price will be taken from each of about 100 yen, down at an annual rate 20% lower. The rapid decline in prices of white LED application quickly growth, but the most promising future still can replace incandescent filament bulbs and fluorescent lamp of white LED.