LED into the automotive field to become the mainstream of automotive lighting development1

Transportation Lighting has become an important application market for LED as a lighting source. At present, LED has been applied to the interior and exterior of automobiles, especially in the interior lighting of automobiles. The application of color LED has become very mature. for example, it is used for instrument panel, backlight lighting switch, car reading light or head-up display system, or on-demand color selection (Color-on-Demand) Function, allowing automakers to distinguish from other competitors by using their own unique identification colors, or use colors to distinguish different series of products. Seven advantages of LED lamps compared with incandescent lamps, LED lamps have significant advantages. First, the life span is long, generally up to tens of thousands or even 100,000 hours. Some people think that if the future car lights use LED, the entire car life does not need to replace the lights. Second, it is very energy-saving, saving at least half of the power than incandescent lamps of the same brightness. Third, the light quality is high, basically no radiation, belonging to the green light source. Fourth, the LED has a simple structure, is sealed with transparent epoxy resin around, and has good seismic performance. Fifth, there is no need for hot start-up time, and the lighting response speed is fast (Nanosecond)It is suitable for objects with fast moving speed. Sixth, the applicable voltage is 6- Between 12 volts, it can be applied to cars. Seventh, the LED occupies a small volume, and the designer can change the lamp mode at will to diversify the car shape. Automobile manufacturers favor LED, which is determined by the advantages of LED itself in the future automobile industry. With the development of LED lamps and the continuous development of automobile external applications, LED has been applied to brake lights, tail lights, turn signals, reversing lights, high-position brake lights, etc. among them, brake lights, taillights and high-position brake lights are widely used. As a vehicle headlamp lighting, due to the need for high-power LED, it is restricted by technology and LED cost performance, especially in the fields of optics, electronic control and thermal management. it will take three to five years to become popular, and the industry has only started to use some luxury models. In addition to the commonly used taillights and high-position brake lights, LED will also be used on a large scale in turn signals and reversing lights in the future. In 2010, the market scale of domestic LED automotive lamps may exceed 1 billion yuan, and an annual output value of 3 billion yuan may be formed within 5 years. According to the LED special report released by iSuppli in 2009, it is estimated that about of new cars will use LED in one or more taillights by 2013. The price of LED lamps is quite different from that of traditional lamps. For example, for a medium and high-grade car, the incandescent lamp combination rear lamp costs 120 yuan/set, while the LED Combination Rear Lamp costs 210 yuan/set. Therefore, the sharp drop in LED prices, the continuous improvement of luminous efficiency and the improvement of heat dissipation technology are the main focus of the future development of LED automotive lamps. Although there are still some problems to be solved, LED has the advantages of small volume, vibration resistance, energy saving, long life and so on, and at the same time gives designers a wider design space. these are all elements to increase the application of LED inside and outside the car. With the continuous improvement of product technology and the continuous expansion of product categories, automobiles will develop in the direction of safety and intelligence in the future. Automobile lamps and lanterns will also develop in the direction of intelligent lighting systems, artistic lamp products and green lamp products. The sales volume of LED automotive lamps and lanterns application market keeps a growth rate of about 10 per year, but the proportion of domestic LED automotive lamps and lanterns is not high. Car companies with large LED usage are concentrated in China, and these car companies generally limit the brand of LED, and it is difficult for domestic LED companies to enter their supply chain. In addition, compared with international famous big brands, domestic LED may have more problems in terms of life span and uniformity of sorting. At the same time, the market supervision of automobile lamps itself is strict and the threshold is relatively high. as luxury consumer goods, automobiles are faced with one-to-one customers after sales. Any quality problem will cause complaints. Domestic LED has no chance to experience this kind of market for a long time and on a large scale. it is difficult to meet the car LED standard. Automotive lamps and lanterns are a very professional field. To do a good job in LED automotive lamps and lanterns, it will be difficult for both automotive lamps and lanterns enterprises and LED enterprises to fight alone. it is necessary for automobile lamp enterprises to have sufficient communication with LED enterprises, especially in the development of LED headlamps.