Patent ID: 9291315
Filing Date: 2016-03-22
CPC Classification: A61B,F21S,F21V,F21Y,G02B,G03B

Claim Text:
1. A lighting device, comprising: at least one laser light source; and a light wavelength conversion element; the light wavelength conversion element comprising phosphor which is arranged on a surface region of a substrate and is used for wavelength conversion of the light emitted by the at least one laser light source; wherein the light wavelength conversion element has a greater thickness at the edge of the surface region, provided with phosphor, of the substrate than at the surface centroid of the surface region, provided with phosphor, of the substrate, the thickness respectively being measured perpendicularly to the surface region, provided with phosphor, of the substrate, wherein the phosphor has a greater thickness on the substrate at the edge of the surface region, provided with phosphor, of the substrate than at the surface centroid of the surface region, provided with phosphor, of the substrate, and wherein the concentration of a wavelength conversion means in the phosphor is less at the edge of the surface region, provided with phosphor, of the substrate than at the surface centroid of the surface region, provided with phosphor, of the substrate.