Optical Simulation of Light Source Devices Composed of Blue LEDs and YAG Phosphor
Ken‐ichi Yamada, Yasuo Imai, Kenichi Ishii · Journal of Light & Visual Environment · 2003
The optical structures and luminous properties of light source devices composed of blue LEDs and YAG phosphor were examined using optical simulation. Results showed that the reflection-type light source device had a high luminous flux over 1.5 times greater than the transmission-type light source device. This suggests that using light reflected from the phosphor is an effective way of obtaining high output from light sources composed of LEDs and phosphor.