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
an interference reflector positioned such that the emissive material is between the output surfaces of the plurality of light guides and the interference reflector, wherein the interference reflector substantially transmits light comprising the second optical characteristic and substantially reflects light comprising the first 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 an interference reflector positioned such that the emissive material is between the output surfaces of the light guides and the interference reflector 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 interference reflector substantially transmits light having the second optical characteristic and substantially reflects light having the first optical characteristic.
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Citations
20 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 an interference reflector positioned such that the emissive material is between the output surfaces of the plurality of light guides and the interference reflector, wherein the interference reflector substantially transmits light comprising the second optical characteristic and substantially reflects light comprising the first 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, 17, 18)
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19. 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 an interference reflector positioned such that the emissive material is between the output surfaces of the plurality of light guides and the interference reflector, wherein the interference reflector substantially transmits light comprising the second optical characteristic and substantially reflects light comprising the first optical characteristic.
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20. A projection system comprising an illumination system, wherein the illumination system comprises:
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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 an interference reflector positioned such that the emissive material is between the output surfaces of the plurality of light guides and the interference reflector, wherein the interference reflector substantially transmits light comprising the second optical characteristic and substantially reflects light comprising the first optical characteristic.
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Specification