As a new green lighting, semiconductor lighting gradually into all areas of people's lives. Led traffic light into light of Chongyaoyingyong 作为 lighting market, at present, LED Yi Dao interior and exterior automotive applications, especially in the automotive interior lighting, color LED's application is well established, such as for instrument panel lighting backlit switches, auto reading lamp or the Head Up Display system, or a car with "on-demand color selection" (Color-on-Demand) feature that allows car manufacturers to identify by using their own unique color to differentiate from other competitors, or use different colors and different series.
LED car lamp history
The development of LED auto lamp LED light source directly associated with the development. Semiconductor electroluminescence phenomenon as early as 1907 found that, because light is very weak, mass production difficult and slow. Monsanto introduced in 1968, the United States more than 20mcd intensity of GaAsp / GaAs structure, the red LED, this is a breakthrough point, greatly accelerated the development of LED. Then have developed a light intensity up to 1000mcd red, yellow and green LED, the instrumentation, telecommunications signals received preliminary instructions on the application form early LED application market. However, because of its light intensity, light attenuation performance issues that can not be widely used in automotive lighting. HP company until 1990, the United States, Japan, Toshiba has introduced more than 1000mcd intensity of InGaAlP / GaAs structure, red, yellow high-brightness LED and 1993, Nichia Corporation of Japan invented InGaN/Al2O3 blue and green high brightness LED as a standard, technically and mass production of automotive LED light source paved the way for.
1985 LED Qiche signal Shoucichuxian in passenger cars, 1986 Nissan300zx Xing car on the use of LED Gaoweizhidong Dengbiaozhizhao LED car Dengjushidai Zhengshikaishi. Internationally renowned brands such as BMW, Cadillac, Buick, Volkswagen, Ford, Mercedes, Toyota, Mitsubishi, Mazda and Skoda has introduced such as LED car lamps.
LED car light double-digit annual growth rate in 2005, output value reached 546 million U.S. dollars, accounting for 14% of the world's LED applications. China in 2000 in Shanghai Volkswagen Santana 2000 high on the first use of LED brake lights. China LED car lamps to 70% -80% annual rate of growth, the output value of more than 100 million yuan in 2006.
Seven advantages of LED lights
LED and incandescent lamps had significant advantages. First, long life, generally up to tens of thousands or even one hundred thousand hours. Some people think that if the future of automotive lighting using LED, the entire period of use without replacement lamps car. The second is very energy than equivalent incandescent brightness of at least saving more than half. Third, high-quality light, almost no radiation, is "green" light. Fourth, a simple LED structure, the internal support structure, surrounded by a transparent sealing, seismic performance. Fifth, no hot start-up time, light, fast response time (nanosecond) for fast moving objects to use. 6 is the voltage applied between 6-12 volts, can apply in the car. 7 is occupied by small LED, lighting designers are free to change mode, make car modeling diversity. Auto makers favor LED, LED is completely determined by its own merits.
LED lights in the future development of automobile industry
Automotive exterior applications are evolving, brake lights, tail lights also turn lights, down lights, brake lights and so on have been applied high LED, including brake lights, taillights are larger high brake light applications. As a vehicle headlamp illumination, due to the need high-power LED, LED by technological and cost constraints, particularly in the optical, electronic control, thermal management Lingyu still has some difficulties, Puji also need three to five years, Ye Jie also only in some high-end luxury models to begin. In addition to the current application of the more common rear lights, high brake lights, turn signals the future, reversing lights also large-scale application of LED. LED auto lamp 2010, the domestic market size may be more than one billion yuan, 5 years, may form the output value of 3.0 billion every year. According to iSuppli released in 2009 "2010LED special report," By the year 2013 about 95% of the world's new cars will be in one or more of the tail light in the use of LED.
Currently, LED lighting application markets automotive sales, 10% per year to maintain the growth rate, but the proportion of domestic LED auto lamps are not high. LED models use a larger concentration than in high-end auto companies, which car companies would usually be limited to the LED of the brand, more difficult for domestic enterprises to enter the LED supply chain. Also 国内 LED and international well-known big brands than in life, and uniformity of sorting possible problems such as more certain, while auto lamp itself strict market regulation, the threshold is relatively high, as luxury consumer goods, automotive, sales, after the face is one to one customer, any quality problems can lead to complaints of domestic LED no opportunity to go through the market long-term large-scale experience, as difficult to achieve automotive LED standard. Automotive Lighting is a very specialized field, to make LED auto lamps, auto lamps, whether business or LED business, it alone would be difficult, need a car LED lighting business enterprises with adequate communication, especially in the car before the LED According to the development of the light.
According to statistics, China has a car capacity to 20 million households, China could become world's third largest auto market, accounting for 6% global share, after the United States and Japan. By 2025, China's automobile market will reach the size of the U.S. auto market. China has become the world's fastest growing car sales area. According to China Automotive Industry Association statistics, in 2009 domestic sales of 15 billion yuan more than lights, LED lights share of the market share which increased year by year, with Shanghai Koito Automotive Lamp Company, for example, in 2009 total vehicle sales of LED lights light 11.7% of sales are expected to total 2011 sales of LED lights will light up more than 15% proportion, while the 2015 LED lamp lights sales accounted for the proportion of total sales will reach more than 30%.
LED lamps and traditional lamps at present there is a large difference in price, such as a high-end cars, incandescent combination light 120 yuan / sets, LED combination light Zexu 210 Yuan / set. LED prices drop, therefore, continuously improve the luminous efficiency and heat dissipation technology is constantly being improved, the future development of LED lamps in the main focus Auto. Although there are still some issues to resolve, but LED volume Xiao, vibration proof, Jieneng, long life advantages, while Fu Yu a designer 更 vast design space Zhexie Dushizengjia LED Zaijuneiwai application elements. As technology continues to improve products and product categories continue to expand in the next car will be safe and intelligent direction. Auto lamp lighting system will also be intelligent, artistic lamp products, light products, the green direction.
