Patent ID: 8044570
Filing Date: 2011-10-25
Classification: F21V,F21Y,H01L

Abstract:
1. A lighting device comprising: a plurality of light-emitting elements configured to emit blue light; a board with the light-emitting elements mounted thereon; a sealing member having light transmitting properties and sealing the light-emitting elements on the board; and a color conversion unit including a cover member formed of light transmitting materials, and a fluorescent substance layer provided on an inner surface of the cover member and having a transparent matrix containing a fluorescent substance dispersed therein, the fluorescent substance producing light of a color other than blue when being exited by the blue light, the fluorescent substance layer being interposed between the inner surface of the cover member and the sealing member; wherein the fluorescent substance layer is divided into at least one red fluorescent substance area in which a red fluorescent substance emitting red light when being excited by the blue light is dispersed in the transparent matrix, and at least one yellow fluorescent substance area in which a yellow fluorescent substance emitting yellow light when being excited by the blue light is dispersed in the transparent matrix, the at least one yellow fluorescent substance area being larger than the at least one red fluorescent substance area.