New advances in LED technology for automotive headlamps

Luminous efficiency and conversion efficiency can be greatly improved

Stanley electric company recently launched the high-power white light emitting diode (LED) for dipped beam and high beam headlights samples. At present, most of the auto lighting manufacturers generally only in the use of white LED module, and then use the HID lamp light. In addition, other white LED manufacturers have also launched for the front of the white LED light source, leaving a white LED module is moving toward high-power impression. All white LED module samples in the form of an optical lens with a diameter of 30 mm - about 50 mm, as LED is a larger variety. In 2008 LED will exceed the luminous efficiency of headlight lamp HID Stanley electric company is jointly developed with the German company hella. The sample will be 4 large LED chip package into a high-power white LED module, this module is equipped with 5 headlights, in the last with 2. The light beam when the total of 700lm, is said to ensure HID lamp brightness just listed. Each white LED module emits a beam of about 140lm. The power consumed by the sample is estimated to be 1.4 - to 1.6 times higher than that of the HID lamp of the same brightness.

Japan Koito manufacturing launch headlamps equipped with 11 white LED module, including the 6, 5 additional high beam light. The light beam of 800lm~1000lm. According to the running state, to control the LED module with the white light. For example, when driving at high speed, the central part of the 5 light, reducing the scope of the beam emitted by the front light, so that the light reaches the distance. In urban traffic, above the central part of the 1 lamp equipped with both sides of the 3 and the central portion with a white LED headlamp light module, enlarge the lighting angle. The front lamp also has the AFS function, and the central part of the headlamp is active in order to turn the light irradiation angle to the turning direction of the vehicle when the curve is running. The energy conversion efficiency of light source system for the white LED light source lamp 65%% OSRAM launched for OSRAM, equipped with the development of Germany as a "white LED module OSTAR". OSTAR is a 4 mm square large LED chip packaging products together in. The beam of each module is as high as 300lm. OSRAM has produced a light source system that includes a power supply for the white LED module IC. When the system is powered up, the conversion efficiency can reach 65%%.

White LED light source TOYOTA company launched a number of large LED chip is encapsulated in 1 modules. The company is prepared to use 12 of this kind of light source prototype. Practical time light white LED

At present, almost all the concept cars, using white LED headlamp. Not only is the production car with peculiar shape feel practical is very far, even as TOYOTA concept car brand Lexus and TOYOTA brand flagship sedan launch next-generation minivan concept car also equipped with white LED headlamps, let people feel the practical is very close.

According to the United Nations Economic Commission for Europe to consider the relevant headlamp related laws, to the end of 2006 to early 2007 that could allow the main light source headlamp using white LED, even the fastest time available to drag after the fall of 2007. After allowing the use of the EU, including Japan and other regions will also allow the use of white LED.