Patent ID: 8467633
Filing Date: 2013-06-18
Classification: F21S,F21Y,H01L,H01S

Abstract:
1. A wavelength conversion structure into which laser light is introduced and which outputs light having a wavelength different from a wavelength of said laser light, the wavelength conversion structure comprising: a light guide formed of a light-transmissive member and having a laser light incident port that allows said laser light to be introduced therein; and a phosphor-containing layer that covers at least a part of a surface of said light guide, wherein said light guide has a light diffusing structure having asperities and a light reflecting film, wherein said asperities are formed over the surface of said light guide except a laser light incident surface having said laser light incident port, and wherein said light reflecting film is formed over the surface of said light guide having said asperities except said laser light incident port and a portion which is covered with said phosphor-containing layer, and wherein said phosphor-containing layer forms a light extracting surface that converts said wavelength of said laser light introduced into said light guide and that allows the converted light to exit out of said wavelength conversion structure.