Phosphor Based Illumination System Having a Plurality of Light Guides and a Display Using Same
First Claim
1. A display, comprising:
- an illumination system, wherein the illumination system comprises;
a light source that emits light comprising a first optical characteristic;
a plurality of light guides optically coupled to the light source, wherein each light guide comprises an input surface and an output surface;
emissive material positioned to receive light from at least one light guide of the plurality of light guides, wherein the emissive material emits light comprising a second optical characteristic when illuminated with light comprising the first optical characteristic; and
a first interference reflector positioned between the emissive material and the output surfaces of the plurality of light guides, wherein the first interference reflector substantially transmits light comprising the first optical characteristic and substantially reflects light comprising the second optical characteristic; and
a spatial light modulator optically coupled to the illumination system, wherein the spatial light modulator comprises a plurality of controllable elements operable to modulate at least a portion of light from the illumination system.
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Abstract
An illumination system including a light source, light guides coupled to the light source, each including an input surface and an output surface, emissive material positioned to receive light from at least one light guide, and a first interference reflector positioned between the emissive material and the output surfaces of the light guides is disclosed. The light source emits light having a first optical characteristic. The emissive material emits light having a second optical characteristic when illuminated with light having the first optical characteristic. The first interference reflector substantially transmits light having the first optical characteristic and substantially reflects light having the second optical characteristic.
55 Citations
17 Claims
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1. A display, comprising:
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an illumination system, wherein the illumination system comprises;
a light source that emits light comprising a first optical characteristic;
a plurality of light guides optically coupled to the light source, wherein each light guide comprises an input surface and an output surface;
emissive material positioned to receive light from at least one light guide of the plurality of light guides, wherein the emissive material emits light comprising a second optical characteristic when illuminated with light comprising the first optical characteristic; and
a first interference reflector positioned between the emissive material and the output surfaces of the plurality of light guides, wherein the first interference reflector substantially transmits light comprising the first optical characteristic and substantially reflects light comprising the second optical characteristic; and
a spatial light modulator optically coupled to the illumination system, wherein the spatial light modulator comprises a plurality of controllable elements operable to modulate at least a portion of light from the illumination system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A sign comprising an illumination system, wherein the illumination system comprises:
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a light source that emits light comprising a first optical characteristic;
a plurality of light guides optically coupled to the light source, wherein each light guide comprises an input surface and an output surface;
emissive material positioned to receive light from at least one light guide of the plurality of light guides, wherein the emissive material emits light comprising a second optical characteristic when illuminated with light comprising the first optical characteristic; and
a first interference reflector positioned between the emissive material and the output surfaces of the plurality of light guides, wherein the first interference reflector substantially transmits light comprising the first optical characteristic and substantially reflects light comprising the second optical characteristic.
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Specification