Patent ID: 9075293
Filing Date: 2015-07-07
Classification: F21V,F21Y,G03B

Abstract:
1. An illumination device comprising: an excitation light source for generating an excitation light; a wavelength conversion material layer with a first surface, the wavelength conversion material layer containing a wavelength conversion material and a scattering material, the wavelength conversion material absorbing a portion of the excitation light and emitting a converted light with a wavelength spectrum different from that of the excitation light, the scattering material scattering the excitation light into a near-isotropic luminous distribution, the wavelength conversion material layer emitting from its first surface a mixed light which includes the converted light and unabsorbed excitation light scattered by the scattering material; a light exit port; and a light guide device located adjacent the wavelength conversion material layer on a side facing its first surface, for directing the excitation light onto the first surface of the wavelength conversion material layer, and directing the mixed light emitted from the first surface of the wavelength conversion material layer into the light exit port.