Koito Manufacturing Co., Ltd. has recently produced LED headlights made of white LEDs and successfully delivered the LS600h, the flagship model of the Lexus depot. LED headlights are Koto's first global production of LED headlight systems after the AFS (Adaptive Front-lighting System) and HID headlights, symbolizing the entry of LED headlights into the "production era."
Gallium nitride (GaN) light-emitting diodes were introduced by Japan Nichia Optics in the early 1990s, and the first white LEDs and semiconductor lighting business were launched in 1996. In recent years, LED materials and epitaxial technology have been evolving. The luminous efficiency of GaN-based LEDs has also advanced by leaps and bounds. The manufacturing cost has been reduced at a rapid rate. The application of white LEDs has become more and more widespread: in addition to the backlights of small-sized LCD screens that most people are familiar with. In-vehicle lighting applications, car direction lights, taillights, etc. In the past two years, LED modules with large LCD screen backlights and even indoor/outdoor lighting applications have appeared. Many people even predict that car headlights will be the next "killer app" for low-energy, high-energy white LEDs.
Due to the insufficient luminous intensity of the LED solid-state light source, the three problems of brightness, optical design and heat dissipation are encountered when applied to the headlight. In addition, the biggest obstacle to the popularity of LED headlights is still the cost. At present, the production cost of white LEDs per lumen is about 1 US dollar, which is a high price compared with the level of less than 0.01 US dollars per lumen of incandescent lamps. Lexus' flagship model LS600h is equipped with LED headlights, which symbolizes that LED headlights have entered the mass production stage. Koito has successfully developed the headlights with white LEDs as a light source and developed them with Nichia. The mass production of LED headlights with the highest brightness in the world.
In addition to the LS600h model, the second production model with LED headlights will be available in 2007: the Audi R8, the supercar R8, will be launched in the middle of this year. The LED headlight module is supplied by Magneti MarelIi, and the internal LED module is Provided by Philips Lumileds. The European Commission (ECE) is very encouraged for the widespread use of energy-efficient LEDs. Although the relevant regulations for the use of LED headlights in the EU have not yet been passed, the Technical Advancement Committee (CATP) has allowed the exceptions of the Audi and Toyota depots in accordance with the current rules. Offer.
Since the LS600h and the Audi R8 are both luxury models with a market price of more than 100,000 US dollars, it is expected that the global sales of LED headlights will be around 10,000 units this year, but the production cost will gradually decrease as the output increases, LED headlights The penetration rate is expected to rise rapidly (60,000 luxury cars in the global market with a price of more than $100,000). If the EU and the US law encourage it, the speed of popularization will be even faster.
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