LED lamp market continues to thermal technology bottleneck still to be broken


LED brake lights currently have a relatively high global market share, and LED headlights are still difficult to compete with HID. It is estimated that the global market share in 2011 will be only about 3%. LED taillights will be the fastest growing automotive lights in the next few years, and by 2011 the market share will increase from 15% in 2008 to 28%, while Asia will be the fastest growing region.

The decorative lamp is mainly used for the beautification of the locomotive inside and outside the car. At present, the control circuit is used to realize the transformation of five colors and ten colors. The function LED lamp is most suitable for the backlight display of the digital instrument assembly, front and rear turn lights, brake lights, position lights, reversing lights, fog lights, reading lights. The requirements for the use of LEDs are basically similar to those of LEDs used in general, but the requirements for LED angle, chromatic aberration, brightness, voltage dispersion value, light decay, heat dissipation, anti-purple and reliability are high. In fact, LED lamp technology has not only played a decorative role of a so-called "vase", LED will rely on its own energy-saving and longevity characteristics will become increasingly prominent, becoming the future direction of automotive lighting.

As for LED main lighting, manufacturers generally believe that LED main lighting still needs a period of brewing to truly achieve a large number of commercialization, of which price is one of the key points. In addition, today's LED heat dissipation, power drive life and lamp compatibility, intelligent control and price are urgent issues for LED lighting systems.


The bottleneck of LED development is mainly in its thermal management. The biggest challenge is the self-heating problem of LED. Most of the LED energy is converted into conduction heat instead of radiant heat, and it is not good for interior lighting. More importantly, conduction heat causes LED semiconductor temperature is too high, it is easy to damage; at the same time, the lumen of LED car lights does not increase with the same current, that is, the power consumption will not necessarily brighten more; while LED Light has obvious directionality, the illumination is not enough; The external environment temperature has the same impact on the LED light, so the thermal management of it is the most fundamental problem to be solved. This involves the control and management of current components, especially the thermistor. The linear control of the current is LED energy. The key to normal and safe work. LEDs change color with changes in temperature and current, which may affect night vision effects and distance determination; current frequencies may even cause frequent flashing of light. At the same time, most countries' laws related to automotive lighting do not have much support for LED lights, and they also limit its development.

The new light source of LED enables the design and styling of automotive luminaires to have unprecedented flexibility and is suitable for the individualization of the model. Moreover, the light output power density of the LED can match the HID luminaire, so it is very promising to put the existing Other lighting technologies are eliminated and the lights are often used.

Although LED headlamps have just started, they will be an area where the automotive LED market is developing very fast. It is estimated that by 2012, the LED headlamp market will reach 80 million US dollars. LED will be the new darling of automotive lighting system with its excellent safety, reliability, energy saving and aesthetic design, bringing new opportunities for the upgrade and revolution of automotive lights.


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