Characteristics of RGB Laser Illumination for Automotive Headlamp

Yuichi Shibata¹, Toshiaki Tsuda², Michihiko Hayakawa^*, Satoshi Yamamura^*

¹Koito Manufactureing co. Ltd, Japan

*Contact email address: yshibata@koito.co.jp (Email)

Abstract— Laser light source is expected to next generation’s automotive headlamp. There are 2 procedures to generate for white light, first is “blue laser + yellow phosphor” type and second is RGB laser type. Blue laser + yellow phosphor type is already mass-produced.

Merit of RGB laser type is possible to change colors of illumination by output adjustment of RGB each color’s power. And RGB laser are composed by not continual spectrum but discrete spectrum. So chromaticity and luminance of visual object is big difference also.

In this report, when use RGB laser for automotive headlamp’s light source, we will introduce the results of measured changes both visual object luminance and chromaticity.

Keywords-component;RGB Laser; Chromaticity; Luminance(key words)