In 1990, HP Company of Japan and Toshiba of Japan developed GaAsP/GaAs red and yellow ultra-high brightness LED (1000mcd). In 1993 and 1995, Nichia Chemical Co., Ltd. successfully developed InGaN blue, green and white ultra-high brightness (1000mcd). Light-emitting diodes, these two revolutionary scientific research results paved the way for the full LEDization of automotive lights. However, LED car lamps cost more. The main problem is that it is a quality and batch problem. The price will naturally come down after the quality and batch problems are solved, but it is not expected that the LED will fall to the same price as the incandescent lamp. LED light source has many advantages to meet people's requirements for safety, comfort, luxury, energy saving, environmental protection and multi-functionality. High-quality, high-grade lamps can not only improve the quality of automobiles, but also enhance their market competitiveness. LED car luminaires will replace incandescent lights like the original incandescent lamps instead of candle lights.
LED lighting application in the automotive industry market development analysis
New and intelligent LED lamps are one of the most dazzling products in the world of automotive electronics. Car luminaires are the eyes of cars, and fashionable car luminaires combine practicality and decoration. It can best reflect the taste of the car, the more personalized cars, high-end cars, the more attention to the design and quality of the lights. At present, international high-end cars such as Cadillac, BMW, Toyota, Mercedes-Benz and Ford have launched new-style cars with colorful LED lamps to attract customers, which will not be affected by the price.
In the second half of 2004, the high growth rate of China's automobiles declined, and the competition in the automotive market was unprecedentedly fierce. New models and new models were continuously introduced, accelerating the development of new LED lights. Shanghai Automotive Electronics Engineering Center and Shanghai Xiaohao Lights Co., Ltd. launched the development of 25 LED lights in 2004, and it is expected to exceed 30 in 2005. Among them, Toyota, GM and Chery and other automobile manufacturers have proposed the demand for seven types of LED signal lamps for four models, which indicates that China's LED signal vehicle lamps have entered a new stage.
From the development status and trend of LED lamp technology, China's LED high-position brake lamps are further popularized, prices are steadily declining, LED rear brake lights, turn signals and fog lamps are beginning to be commercialized, and LED automotive lamps are becoming more personalized and artistic. Development, while the LED intelligent control system is developing rapidly. At present, the key research direction of LED automotive lamps is white LED headlights, and LED lights combined with AFS (adaptive lamp control system), among which high-efficiency, high-power, high-reliability LED components research, headlights and Special heat dissipation techniques and optical design are key.
Automotive lamps have high performance requirements for LED components. There are three main points: high efficiency, high power, high reliability (-40 ° C ~ 125 ° C); second, electrical and optical parameters stability, consistency, such as the same The threshold voltage inconsistency of batch components is less than 0.1V, the monochromaticity is good, and the color difference is less than 5 nanometers. The third is that the LED component is less than 20% after the 136V is lit for 2000 hours (operating under DC).
In the next five years, China's LED lights will develop rapidly. In the next few years, an annual output value of 1 billion yuan will be formed, and an annual output value of 3 billion yuan will be formed within 5 years. At present, the market for automotive LED components, Lumileds in the United States and Osram in Germany have a large share of high quality and variety. China's Taiwan and China's Pearl River Delta and Yangtze River Delta regions have developed rapidly, and their quality has improved significantly in the past two years. There is a certain market for cheap, but there is still a big gap in high-power LEDs .
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