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US 7,397,984 B2Granted
Light guide screen louver device
AssigneeHewlett-Packard Development Company, L.P.
InventorsHuei Pei Kuo, Lawrence M. Hubby, Jr.
Life of this patent
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Abstract
In a particular embodiment, the louver device includes a transparent layer of material having a first surface and, parallel thereto, a second surface. A plurality of shaped louver members are disposed within the transparent layer of material. The shaped louver members are aligned to receive light entering the first surface at a first angle relative to the first surface and direct the light out the second surface at a plurality of angles relative to the second surface.
Claims28
A light guide screen louver device, comprising:
- a transparent layer of material having a first surface and, parallel thereto, a second surface;
- a plurality of shaped louver members composed of a plurality of louver member segments disposed within the transparent layer of material, the shaped louver members aligned to receive light entering the first surface at a first angle relative to the first surface and direct the light out the second surface at a plurality of angles relative to the second surface;
- wherein each shaped louver member segment is a cylindrical or elliptical mirror segment.
A light guide screen louver device, comprising:
- a transparent layer of material having a first surface and, parallel thereto, a second surface;
- a light redirection means for receiving light presented through the first surface at a first angle with a low angular range and increasing the angular range as the light is directed through the second surface at a plurality of angles relative to the second surface;
- wherein the means for receiving light and increasing the angular range is a shaped louver member composed of a plurality of louver member segments, each louver member having at least one concave or convex area.
A light guide display comprising:
- a plurality of rows, each row including a plurality of light guides, each light guide having a light transmitting core and an index of refraction, each light guide having an input end and an output end, the plurality of output ends collectively grouped as an output location;
- a transparent layer of material having a first surface adjacent to the output location and parallel thereto a second surface, the transparent layer of material having an index of refraction matched to the index of refraction of the light guide course;
- and
- a plurality of shaped louver members composed of a plurality of louver member segments disposed within the transparent layer of material, each shaped louver member having at least one concave or convex area, the shaped louver members aligned to receive light entering the first surface at a low angle relative to the first surface and direct the light out the second surface at a plurality of angles relative to the second surface.
1 more element
A light guide display comprising:
- a case;
- a plurality of rows disposed within the case, each row including a plurality of light guides, each light guide having a light transmitting core and an index of refraction, each light guide having an input end and an output end, the plurality of output ends collectively grouped as an output location, the plurality of input ends collectively grouped as an input surface;
- a transparent layer of material having a first surface adjacent to the output location and parallel thereto a second surface, the transparent layer of material having an index of refraction matched to the index of refraction of the light guide core;
- a plurality of shaped louver members composed of a plurality of louver member segments disposed within the transparent layer of material, each shaped louver member seciment a cylindrical or elliptical mirror seciment, the shaped louver members aligned to receive light entering the first surface at a first angle relative to the first surface and direct the light out the second surface at a plurality of angles relative to the second surface;
- and
- at least one image source proximate to the input surface.
3 more elements
Dependencies are inferred from the claim text.