New green lighting: LED applications (Photos)

LED light-emitting principle: light emitting diode LED (Light Emitting Diode) is the use of electronic and gap diode combined output of the light generated in the process of energy conversion.

LED characteristics: cold light does not produce heat, long life components (one hundred thousand hours), fast response, small volume, low power consumption, suitable for mass production, high reliability.

LED materials usually arsenic, phosphorus, gallium and other III-V elements, including upstream production process of wafer production, epitaxial growth, the middle reaches of the diffusion process, metal evaporation, grain production, and the downstream product packaging and application market.

Two, market overview:

LED can be divided into visible light (450~780nm) and visible light in the visible part of the traditional brightness of the product is a mature product, the output is big, but because the price is low value is not high, the compound annual growth rate of only 10%; high brightness LED is the current mainstream products, mainly used in large billboards, traffic signs, backlight, automobile brake lights third. More mature AlGaInP (red, orange, yellow light) is widely used, the patent is not a problem, the price has been close to the traditional brightness, the application of a huge field. At the present stage is the most popular GaInN (blue, Lv Guang) in recent years in the blue backlight products, mobile phone under the trend of strong demand, are too busy to attend to all. GaInN+ phosphor (white light) is mainly used in lighting, because the research breakthrough global manufacturers have to invest in blue light, coupled with the recent popularity of the mobile phone color, white backlight hot technology in the future if there is progress, will gradually replace the general lighting market, a huge business opportunities.

In visible light, mainly used in infrared (850~950nm) and optical communications (850~1550nm), due to higher investment in this area, technical difficulty, price and gross margin products are good, the market is the United States, Japan and Europe and other manufacturers eating situation.

Strategies Unlimited according to estimates, the 1998 World visible LED production value, Japan to share $1 billion 40 million and 54.1% of the top second; share $346 million in Taiwan, 18%, the United States ranked third in 16.5%, $318 million, is $200 million; output value of Europe, and 10.4% share.

Three, the application of LED

Application of LED is very wide, including communications, consumer electronics, automotive, lighting, lights, can be roughly divided into backlight, display, lighting, electronic equipment, vehicles and other five major areas.

, 1 auto parts: automotive interior use includes a dashboard, speakers and other lights, and outside of the vehicle (third brake lights, taillights, left and right direction lamp etc.), the current European series vehicles include Audi, BMW, and other brands of the whole series of Fuchs using high brightness LED, and Japanese car factory also, TOYOTA will be the first car dashboard backlight for high brightness LED, other car factory car, also in succession by. If coupled with front and rear lights, brake lights, traffic signs, etc., and traffic related market, business opportunities are very large. In the light of the traffic signs, the world has about 20 million traffic signs, if the annual update 2 million, business opportunities can be extended for 10 years.

2, backlight part mobile phone backlight light source, is the largest market for SMD applications. Although the last two years, the growth rate of mobile phones has slowed down significantly, but there are still 400 million levels throughout the year, with a phone to LED backlight source of 2, key SMD LED meter, a year to maintain the needs of the 400 million mobile phone about 3 billion 200 million LED. The recent South Korean mobile phone backlight blue wave, blue light of the LED mobile phone market demand, it still occupies a pivotal position in the LED market. The blue mobile phone, the current market is the mobile phone world. The mobile phone is a very high-end products, but this year the main component price decline, the mobile phone and mobile phone color spreads narrowed, promotion plus for mobile phone manufacturers, tidal quietly.

In addition, in PDA DSC two new products will enter a full-color stage, with considerable business opportunities.

3, display LED display as a new display media, along with the rapid development of large-scale integrated circuit and computer technology, has been rapid development, and it shows that the traditional media - the colorful neon lights, television wall, four-color magnetic flap compared to its high brightness, dynamic image display good effect and low failure rate, low energy consumption, long service life, ample display content and display higher price performance advantages, has been widely used in all walks of life.

4, electronic equipment and lighting

LED with its low power consumption, small volume, long life characteristics, has become the preferred electronic equipment indicator, at present almost all electronic devices have LED figure.

The initial stage of LED lighting has been gradually developed to commercialization, only in the service life and the price still has room for improvement. In accordance with the manufacturer's forecast, the fastest in 2004, the luminous efficiency of white LED can reach the same 60lm / 20W fluorescent tube, and in 2010 to 100 LM / W, enough to replace the 40W fluorescent tube. As for the unit price will be about 100 yen per unit, down to an annual rate of 20%. The rapid decline in the price of white LED applications quickly grow, but the future is still the most promising to replace incandescent tungsten bulbs and fluorescent white LED.