Lighting is indispensable when driving a car. The main functions of automotive lighting equipment have two points: one is the lighting function, that is, illuminating roads, traffic signs, pedestrians, other vehicles, etc., to identify signs and obstacles; the second is the signal function, which shows the presence of the vehicle and conveys the vehicle. State signal. The use of lighting sources in automobiles began around the beginning of the 20th century. The first use of kerosene lamps and acetylene lamps began with the use of electric light sources, from vacuum incandescent lamps, gas-filled incandescent lamps, tungsten halogen lamps to gas discharge lamps. In the development process, LED has become a high-profile new generation of lamp light source technology due to its advantages of small size, long life, low power consumption and fast response speed.
In 2007, various applications of LED products will enter a high-speed growth period. Overall, mobile phone applications have shown a slowdown in growth, while other aspects such as automotive use will increase substantially. In terms of the number of vehicles, each vehicle requires 100 (internal) and 200 (external). Internal applications such as instrument panels, reading lights, and external applications are taillights, brake lights, directional lights, headlights, etc. At present, almost all car manufacturers using LEDs in the whole car are European companies. In terms of LEDs for external lighting, the ratio of the third brake lamps to LEDs in European and Japanese cars has exceeded 80%. Table: LED application in the car
In 2005, the total market for high-brightness light-emitting diodes (LEDs) reached US$5.8 billion. In 2006, the overall market reached approximately US$6.6 billion. In 2011, it increased to US$10.6 billion, with an average annual growth rate (AAGR) of 10.2%. At present, the scale of automotive LEDs accounts for about 12%. With the maturity of LED technology, the market share of automotive LEDs will inevitably increase. Figure: Statistics and forecasts of global automotive LED market size from 2005 to 2010