抄録
We developed the compact high brightness white light source based on the nitride semiconductor blue laser diodes (LDs) with yellow phosphor materials. The blue laser light from the LD is focused on yellow phosphor by optical lens. As a result, the white light is obtained by mixing the blue laser light and the yellow light of phosphors excited by blue laser light. The luminous flux and the luminance were 250lm and 270cd/mm2 at the operating current of 1.2A. This high luminance is 2.5 times higher than conventional HID lump.
