New headlight study
The Light Technology Instiute at the University of Karlsruhe has presented Voxellight - an LED headlight array for measuring different light distributions. The headlights were tested under actual road conditions and were used to investigate the new light distribution patterns such as the Advanced Frontlighting System (AFS)
LEDs have achieved new levels in performance. The development of the white LED in particular has led to a number of solutions that until recently would have been unthinkable. In just the next two years we can expect brightness to double, and to triple by the end of the decade. The day when they can be used in car headlights is tantalisingly close.
The Light Technology Instiute at the University of Karlsruhe has now developed a headlight comprising 128 high-flux LEDs. These LEDs are arranged in arrays on the front of the university's test car. The beam angle of each LED can be precisely defined by its alignment. When all the LEDs are active the result is a semi-circular beam characteristic in front of the vehicle and the entire area in front on the vehicle can be illuminated.
Four high-power Golden DRAGON LEDs are used in each module. Like other LEDs from OSRAM Opto Semiconductors, they offer exceptional brightness thanks to the use of thin-film chips. The ThinGaN chips (indium gallium nitride) produce 64 lm from an operating current of 500 mA and a forward voltage of 3.2 V instead of 40 lm previously. An optimised package and a special carrier material for the chip ensure excellent heat dissipation.
These high-power LEDs ca also be used to provide daylight running light. Golden DRAGON LEDs are not just very bright, they consume very little power. The proprietary colour grouping scheme also ensures uniform light in one white group with no discernible differences in colour. The colour location falls within the standardised ECE white field, which means that the LEDs can be used in all headlights without restriction.
Like all LEDs, Golden DRAGON LEDs are relatively small and robust. They take up very little space in the headlight and can withstand jolts and vibrations. They last so long that in most cases they will outlive the vehicle, so they will never need replacing. Voxellight will be presented during the "Lichttechnik Tage in Karlsruhe - LTiK 2006" on November, 6th and 7th. For more information on Voxellight go to: www.lti.uni-karlsruhe.de/voxellight
For further information, please visit:
Golden DRAGON Product Promotion
Golden DRAGON Technical Information
