China's automotive LED lighting increased by more than 80% per year

The basic structure of the LED automobile lamp is composed of five parts: 1.LED array; the 2 mirror; the 3 light; the 4 radiator; the 5 drive circuit.

The development of LED automobile lamps is directly related to the development of LED light source. Semiconductor electroluminescence as early as in 1907 found that due to the light is very weak, slow progress in mass production and slow. In 1968, the United States launched the GaAsp/GaAs light intensity of more than 20mcd of the red LED structure, as a breakthrough point, greatly accelerated the development of LED. Then, the red, yellow and green LED with light intensity up to 1000mcd were developed, and the preliminary application in the signal indication of instrument and Telecom was formed, which formed the early application market of LED. However, due to its light intensity, light attenuation and other performance indicators can not be widely used in automotive lamps. Until 1990 the United States HP company, Toshiba Co of Japan launched InGaAlP/GaAs more than 1000mcd of the structure of light red, yellow high brightness LED and 1993 Nichia Corporation of Japan invented InGaN/Al2O3 blue and green high brightness LED as a symbol, from the technology and mass production paved the way for the automotive lamp light source LED.

1985 LED car signal light appeared on the bus for the first time, in 1986 the use of Nissan300zx LED high brake lights marked the beginning of the era of LED auto lamps. The world famous car brands such as BMW, Cadillac, Buick, Volkswagen, Ford, Mercedes Benz, TOYOTA, MITSUBISHI, Mazda and Skoda has launched LED auto lamps.

LED automotive lighting annual growth rate of two digits, in 2005 the output value has reached $546 million, accounting for the world's LED applications 14%. China in Shanghai Volkswagen Santana in 2000 on the first use of the LED high brake lights. China's LED automotive lamps in the annual growth rate of 70%-80%, the output value of more than 100 billion yuan in 2006.

At present, the international LED headlamps in the research and development process, the concept has been launched, there is no commodity. In addition to LED headlamps, have been commercialized, and has entered the intelligent control of the vehicle during the period of China's automotive lighting LED, intelligent level about five years difference with the international level.

Future LED will improve the quality of the LED, the price decline in the car to get a wider range of applications.

Design must take into account two aspects

Directly related to the optical components of the main lights, reflectors and light distribution mirror three parts, collectively referred to as the lighting group. The optical design of the lamp is the design of the lamp group. The design principle of the lighting group is the first consideration: first, it is consistent with the overall structure of the vehicle, the design idea; two is to meet the requirements of the national norms and standards.

LED light source should be based on the requirements of different lamps on the luminous flux, the use of different powers of LED array composed of LED. The reflector is designed to improve the light output rate and meet the requirements of light distribution performance of the special design of the mirror, the role of the light emitted from the light source to illuminate the mirror on a certain distribution. The function of the light distribution mirror is that the light reflected by the reflecting mirror is distributed or scattered to the required position through the pattern on the light distribution mirror to achieve the requirement of light distribution.

For a long time, the lamps and lanterns of the incandescent light source as a reference to determine the lighting design, and the corresponding software. Lighting standards and standards are also used to develop. LED light source has its own characteristics, design and manufacture of LED auto lamps can not simply apply the conventional methods must be done to modify its design and manufacturing methods, and to develop a standard compatible with LED auto lamps. To this end, to carry out related research and development.