The Low Beam Light Optical Configuration of High Brightness LED Headlamp

Abstract

The low beam light optical configuration of high brightness LED headlamp is designed in this paper. When we design low beam light, three same optical units are overlapped to achieve sufficient luminous flux. LED optical source is arranged and packaged into a LED by using multi-chip in linear array. Each unit uses multi-ellipsoid reflector to converge light issued by multi-chip high-power LED light source, which covers partial light to form by light-dark blocking some of the light baffle to form an cut-line, the light is converged through optical lens to obtain the light-type that low beam light requires. The application of ASAP software implements the simulation, and the test results show that this design meets the national standard of low beam light.

Comparison of Pedestrian Detection With and Without Yellow-Lens Glasses During Simulated Night Driving With and Without Headlight Glare

“…Figure 1 shows the spectral characteristics of the 3 yellow-lens glasses as well as the emission power spectrum of the white, high-power, light-emitting diode (LED) used in the HLG simulator (NSPW500DS; Nichia Corp). Similar high-intensity LEDs of 4100K or 5000K color temperature are often used for vehicle headlights, and those headlights have a similar power spectral peak at 400 to 500 nm . Spectral characteristics of the 3 yellow-lens glasses were measured by a spectrophotometer (Evolution 220; Thermo Fisher Scientific Inc).…”

“…Similar high-intensity LEDs of 4100K or 5000K color temperature are often used for vehicle headlights, and those headlights have a similar power spectral peak at 400 to 500 nm. [19][20][21] Spectral characteristics of the 3 yellow-lens glasses were measured by a spectrophotometer (Evolution 220; Thermo Fisher Scientific Inc). The transmittance of all 3 yellow-lens glasses has similar characteristics; most long-wavelength lights are transmitted through the lens and shorter-wavelength lights are blocked by the lens.…”