Patent ID: 8474997
Filing Date: 2013-07-02
Classification: F21V,F21Y,H04N

Abstract:
1. An illumination device comprising: a first excitation light source generating a first excitation light, the first excitation light source having a light emitting surface from which the first excitation light exits; a wavelength conversion material formed on the light emitting surface of the first excitation light source; a second excitation light source structure generating a second excitation light incident on the wavelength conversion material from a second side which is opposite the first excitation light source; wherein the wavelength conversion material absorbs the first and second excitation lights and generates a converted light having different wavelengths than the first and second excitation lights; wherein the first excitation light source has a highly reflective layer on a surface opposite the light emitting surface which reflects the first excitation light and the converted light; and a light separation structure disposed between the wavelength conversion material and the second excitation light source structure to separate the converted light and the second excitation light.