Patent ID: 8324796
Filing Date: 2012-12-04
Classification: G02F,H01L

Abstract:
1. A lighting device comprising: a light emitting element that emits a first colored light; a phosphor layer that is disposed on the light emitting element and has a size allowing the phosphor layer to protrude around the light emitting element, the phosphor layer allowing a part of the first colored light to transmit therethrough and converting another part of the first colored light into a second colored light having a wavelength longer than that of the first colored light; and a lens part that is disposed so as to cover the light emitting element and the phosphor layer, and radiates light entering inside of the lens part so as to spread the light radially, wherein the lens part has: a base portion forming a light entrance surface through which the first colored light and the second colored light enter the lens part; and a diffraction portion forming a light exit surface through which the first colored light and the second colored light exit the lens part, the diffraction portion being configured so that a refracting power with respect to the second colored light is larger than a refracting power with respect to the first colored light.