Integration of non-Lambertian LED and reflective optical element as efficient street lamp.
A cost effective, high throughput, and high yield method for the increase of street lamp potency was proposed in this paper. We integrated the imprinting technology and the reflective optical element to obtain a street lamp with high illumination efficiency and without glare effect. The imprinting technique can increase the light extraction efficiency and modulate the intensity distribution in the chip level. The non-Lambertian light source was achieved by using imprinting technique. The compact reflective optical element was added to efficiently suppress the emitting light intensity with small emitting angle for the uniform of illumination intensity and excluded the light with high emitting angle for the prevention of glare. Compared to the conventional street lamp, the novel design has 40% enhancement in illumination intensity, the uniform illumination and the glare effect elimination.
Pan
Jui-Wen
JW
Institute of Photonic System, National Chiao Tung University, Tainan, Taiwan 71150, ROC. juiwenpan@gmail.com
Tu
Sheng-Han
SH
Sun
Wen-Shing
WS
Wang
Chih-Ming
CM
Chang
Jenq-Yang
JY