For the development of LED lamp market for automobiles, some high-grade cars in America and Japan, Europe has begun t use of LED lighting, with the development of China’s economy, the automobile and motorcycle industry in recent years fast forward, its supporting products automobile and motorcycle lamp lights the demand quantity will be increased synchronously. Although a few years ago, LED lamp market expansion is slow, is expected to have a rapid development in the last two years, and has 2 lamp in the front combination lamps, (such as rear brake lamp and rear steering lamp) using LED light source. LED is called the fourth generation car light, LED lights in addition to higher one-time investment, compared with traditional incandescent lamps, LED has good quality and higher grade. As oil prices rise, the new energy vehicle development has attracted much attention, so energy saving is the main topic of widespread concern. LED highlights the enormous advantage in energy saving, believe that often focus on Audi’s new models may know, over the past few years continuously in the brake light on the popularity of the use of LED (light emitting diode: is composed of the electric energy can be directly converted into light energy made of crystal semiconductor compounds arsenic gallium and gallium phosphide is the basic material.) Appear in the headlight, compared with traditional incandescent lamps, LED made the headlights not only lighting effect is high, and low energy consumption. At the same brightness and high power light emitting diode when the demand for electricity is the halogen headlamps half. Although in the present circumstances, LED has not yet reached the level of energy-saving xenon headlamps, but this technique still has great development potential. Car lamp with LED lamp decoration and function is divided into two categories glorified car inside and outside with Decorative lamp, at present more than matched control circuit to realize the colorful transform. The most suitable function LED lamp indicating lamp backlight in the digital meter assembly display, before and after the turn lights brake indicator lamp, reversing lamp fog lamp profile indicating light reading lamp. The use of LED basic requirements and general use of the LED is similar, but the angle of the LED, color, brightness, voltage discrete value, depreciation, heat, ultraviolet proof and high reliability requirements to. In fact LED headlight technology has not only plays the role of decoration, a so-called “vase”, LED will rely on it