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Optical Design of an Automotive Headlamp System Using a Laser Diode
New Phys.: Sae Mulli 2017; 67: 1534~1540
Published online December 29, 2017;
© 2017 New Physics: Sae Mulli.

Eunmi PARK1, Hyeonjoon PARK2, Jongtae KIM*2

1 Department of LED Convergence Engineering, Pukyong University, Busan 48513, Korea
2 Department of LED Convergence Engineering and Display Engineering, Pukyong University, Busan 48513, Korea
Correspondence to:
Received August 2, 2017; Revised October 31, 2017; Accepted November 1, 2017.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
The development of Nichia's blue light-emitting diodes (LEDs) combining white LEDs with blue LED chips and YAG phosphors has become the most promising solid-state lighting technology. However, the LED has a high operation current, which causes a problem of efficiency deterioration due to a decrease in the quantum efficiency internally or externally due to a temperature rise in the device. The temperature rise also causes a change in the peak wavelength and has a detrimental effect on the phosphor. In contrast, laser diodes do not experience this efficiency loss. In this study, phosphor modeling for realizing white light by using a laser and downward light modeling using a LED headlamp structure were studied. Because the modeled laser has divergent angles, we simulated various optical systems to capture the focal position. We selected the optimized optical system modeling based on simulation, and we present various research directions based on an analysis of the ECE-R112 regulation.
PACS numbers: 42.15.Eq, 42.79.Fm
Keywords: Laser diode, Low-beam, Headlamp, Phosphor

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