cut into the car market has been led for many years, but because of insufficient brightness and cost reasons, has not been widely accepted. Is currently mainly used in high-end sedan market, Japanese automakers abroad, especially in the application of LED has been quite extensive. Auto LED lamp lighting depending on the application can be divided into light, with light with three lights and decorative lights, with light indicator for backlighting instrument display, front and rear turn lights, brake lights, reversing lights, fog lights, reading lights and other functional aspects. Mainly used in automotive lighting decorative lighting color changing, generation car inside and outside landscaping.

As part of the vehicle in recent years, LED brightness problem solving and cost reduction, increase the amount of its application. Breakthrough is the most difficult in recent years been applied before the car headlights lighting applications, such as Japan's top auto manufacturers introduced Lexus hybrid "LS600h" and "LS600hL", Toyota cars in the first production car equipped with the world using white LED headlights. The use of LED headlights of 5 high-power white LED, can be expected with the brightness and light pattern. While also promising to improve and had to use multiple LED illumination factors, but by using multiple, not only improve the efficiency of white LED light, but also brought to the power control to HID headlamps with the same level of benefits .

And compared to traditional incandescent vehicle, vehicle performance LED has many outstanding advantages, mainly in the following aspects: First, long life. LED lamp life of up to 50,000 hours in theory, the actual life expectancy of up to 20,000 hours, in general do not need to be replaced during the life of the vehicle, and better the life of incandescent bulbs vehicle also 3000 hours -5000 hours. Secondly, the energy saving. LED lights can be directly converted into light energy to electrical energy, environmental protection and energy saving effect is good, but incandescent bulbs can only 12% -18% electricity into light energy. General application, such as incandescent taillight power 21W, and the application of LED taillights power is only 3W-5W; Third, no delay. Start time of ordinary incandescent bulbs typically 100 ms -300 ms, while the LED's start-up time of only tens of nanoseconds, start time is greatly reduced. LED lights also have a light color selective large, resistance to vibration and impact resistance, low heat, environmental adaptability unparalleled advantages such as incandescent lamps.

But the LED to get a large-scale vehicle application, there are still many obstacles, mainly in:

1, compared with incandescent bulbs, the high cost of LED applications, LED based on the number of used, quality of different prices for similar incandescent bulbs typically several times to ten times the product range. Although there has long been high-power LED, but its cost is proportional to its power level, global automotive LED production costs will affect the future rate of decline in vehicle LED large-scale application of the main factors.

2, due to end-consumers become increasingly demanding the appearance of lights, and as the number of LED lights more and more applications, LED increasing the probability of a problem, and therefore the reliability of LED product performance requirements higher and higher. While commercial vehicle requirements for LED suppliers more and more demanding.

3, with the automotive LED market is growing, the new supplier is bound to add more and more competition, the supplier of the product quality varies, bound to affect the reputation of the market, thus affecting the final consumer demand. As long as the LED and incandescent lamps cost to the same level, in addition to economic cars are outside the car will be large-scale application of LED.

Keywords: LED lights

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