A Study of the Light Source Device Composed of Blue LEDs and YAG Phosphor by Using Optical Simulation
Ken‐ichi Yamada, Yasuo Imai, Kenichi Ishii · JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN · 2002
The optical structures and luminous properties of the light source device composed of blue LEDs and YAG phosphor were examined by using optical simulation. Results showed that the reflection-type light source device had high luminous flux over 1.5 times more than the transmission-type light source device. This suggests that using light reflected from phosphor is an effective way to obtain high output from light sources composed of LEDs and phosphor.