LIGHT SOURCE DEVICE AND VEHICLE LAMP
First Claim
1. A light source device comprising:
- a light source which emits excitation light; and
a phosphor layer which emits fluorescent light by the excitation light, whereinthe light source device mixes the fluorescent light emitted from the phosphor layer with the excitation light diffused and reflected in the phosphor layer, and emits illumination light,the phosphor layer includes;
a plurality of phosphor particles which emit the fluorescent light by the excitation light; and
a plurality of diffusion reflection particles which diffuse and reflect the excitation light, andthe plurality of phosphor particles and the plurality of diffusion reflection particles are dispersed in the phosphor layer.
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Accused Products
Abstract
A light source device which includes a light source which emits excitation light and a fluorescent layer which emits fluorescent light by the excitation light from the light source, mixes the fluorescent light emitted from the phosphor layer with the excitation light diffused and reflected in the phosphor layer, and emits illumination light. The phosphor layer includes a plurality of phosphor particles which emit the fluorescent light by the excitation light and a plurality of diffusion reflection particles which diffuse and reflect the excitation light. The plurality of phosphor particles and the plurality of diffusion reflection particles are dispersed in the phosphor layer. It is possible to reduce a regular reflection amount and adjust a color mixing ratio between the fluorescent light emitted from the phosphor layer and the excitation light diffused and reflected therein according to a mixed amount of the diffusion reflection particles 7.
111 Citations
13 Claims
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1. A light source device comprising:
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a light source which emits excitation light; and a phosphor layer which emits fluorescent light by the excitation light, wherein the light source device mixes the fluorescent light emitted from the phosphor layer with the excitation light diffused and reflected in the phosphor layer, and emits illumination light, the phosphor layer includes; a plurality of phosphor particles which emit the fluorescent light by the excitation light; and a plurality of diffusion reflection particles which diffuse and reflect the excitation light, and the plurality of phosphor particles and the plurality of diffusion reflection particles are dispersed in the phosphor layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A vehicle lamp using a light source device, wherein
the light source device includes: -
a light source which emits excitation light; and a phosphor layer which emits fluorescent light by the excitation light, wherein the light source device emits illumination light in which the fluorescent light emitted from the phosphor layer and the excitation light diffused and reflected in the phosphor layer are mixed, the phosphor layer includes; a plurality of phosphor particles which emit the fluorescent light by the excitation light; and a plurality of diffusion reflection particles which diffuse and reflect the excitation light, and the plurality of phosphor particles and the plurality of diffusion reflection particles are dispersed in the phosphor layer.
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Specification
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- Resources
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Current AssigneeMaxell, Ltd.
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Original AssigneeHitachi Maxell Limited (Hitachi, Ltd.)
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InventorsMISAWA, Tomonari, MORITA, Kousaku
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Application NumberUS14/785,929Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current1/1CPC Class CodesF21S 41/16 Laser light sourcesF21S 41/176 Light sources where the lig...F21S 41/285 Refractors, transparent cov...
