LIGHT EMITTING DEVICE PROVIDED WITH A WAVELENGTH CONVERSION UNIT INCORPORATING PLURAL KINDS OF PHOSPHORS
First Claim
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1. A light-emitting device, comprising:
- a light-emitting element for emitting primary light; and
a wavelength conversion unit for absorbing part of the primary light and emitting secondary lights having wavelengths longer than a wavelength of the primary light;
whereinsaid wavelength conversion unit includes plural kinds of phosphors having different emission peak wavelengths and different median diameters.
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Abstract
A light-emitting device includes a light-emitting element for emitting primary light, and a wavelength conversion unit for absorbing part of the primary light and emitting secondary light having a wavelength longer than that of the primary light, wherein the wavelength conversion unit includes plural kinds of phosphors having light absorption characteristics different from each other, and then at least one kind of phosphor among the plural kinds of phosphors has an absorption characteristic that can absorb the secondary light emitted from at least another kind of phosphor among the plural kinds of phosphors.
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5 Claims
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1. A light-emitting device, comprising:
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a light-emitting element for emitting primary light; and a wavelength conversion unit for absorbing part of the primary light and emitting secondary lights having wavelengths longer than a wavelength of the primary light;
whereinsaid wavelength conversion unit includes plural kinds of phosphors having different emission peak wavelengths and different median diameters. - View Dependent Claims (2, 3, 4, 5)
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Specification