Analysis: Two major obstacles to the popularization of LED automotive lighting market


Release time:

2023-03-31

A few days ago, the spy photos of the BMW 3 Series facelift planned to debut in 2015 were finally exposed. Not only has it been fully upgraded, but its headlights and taillights are all made of LEDs, which makes it more bright, not only arousing the pursuit of BMW fans, but also making There is a lot of discussion in the LED automotive lighting industry.

  A few days ago, the spy photos of the BMW 3 Series facelift planned to debut in 2015 were finally exposed. Not only has it been fully upgraded, but its headlights and taillights are all made of LEDs, which makes it more bright, not only arousing the pursuit of BMW fans, but also making There is a lot of discussion in the LED automotive lighting industry.

  In 1985, LED car signal lights appeared on passenger cars for the first time. In 1986, Nissan 300zx cars used LED high-mounted brake lights, marking the official beginning of the era of LED car lamps. Subsequently, BMW, Audi, Mercedes-Benz and other internationally renowned automobile brands also successively launched LED automotive lamps.

  Subsequently, LED car lights grew at a double-digit rate every year. In 2005, the output value reached 546 million US dollars, accounting for 14% of the world's LED applications.

  In 2000, China was the first to use LED high-mounted brake lights on the Shanghai Volkswagen Santana 2000, and it is growing at a rate of 70%-80% every year. In 2006, the output value exceeded 100 million yuan. After 2010, LED automotive lamps are widely used.

  Right now, with the financial investment in energy saving and emission reduction in various places, the quality of LED has improved and the price has dropped, and LED has been widely used in automobiles. Some industry insiders predict that by 2015, the scale of China's LED industry will reach 500 billion. As a result, the promotion of LED automotive lighting has become a big cake that the industry is openly optimistic about.

  How to grasp the opportunities in the future and share this big cake? Some experts in the automotive field pointed out that for a long time, car lights have used incandescent lamp point light sources as references to determine the lighting design of lamps and form corresponding software. The norms and standards of lighting are also formulated in this way. However, because LED light sources have their own characteristics, the design and manufacture of LED car lights cannot simply apply conventional methods, and the design and manufacturing methods must be modified. At the same time, specifications and standards that are compatible with LED car lights must be formulated.

  This shows that there are still many problems to be solved urgently in the design of LED automotive lamps. The above-mentioned experts in the automotive field pointed out that the parts of car lights directly related to optics mainly include three parts: light source, reflector and light distribution mirror, collectively referred to as the lighting group. Among them, the reflector is a mirror specially designed to improve the light output rate of the light source and meet the requirements of light distribution performance. Its function is to irradiate the luminous flux emitted by the light source to the reflector according to a certain distribution. The function of the light distribution mirror is to distribute the light reflected by the reflector through the pattern on the light distribution mirror to shift or scatter the light to the required position to meet the light distribution requirements. Therefore, the LED light source should select LEDs of different powers to form an LED array according to the requirements of different lamps for luminous flux.

  The optical design of the car light is the design of the light group of the car light. Therefore, the principle of the first consideration of the design of the light group is: one is to meet the overall structure and shape of the car light by the OEM; the other is to meet the requirements of the specifications and standards stipulated by the state. .


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