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US 2007/0177406 A1Published application
Illumination apparatus
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsHajime Kimura, Rumo Satake
Life of this patent
Estimating the term…
Abstract
A point light source is converted into a plane light source having a satisfactory uniformity. The point light source is converted into a line light source by means of a linear light guiding plate, and further into the plane light source by means of a plane-like light guiding plate. Light from the point light source is reflected at a lamp reflector to be incident on at least two side surfaces of the plane-like light guiding plate.
Claims20
An illumination apparatus comprising:
- a first light guiding plate;
- a second light guiding plate;
- a reflecting plate;
- and
- a point light source,
- wherein a light emitted from said point light source is incident on said first light guiding plate and exit through said first light guiding plate, and
- wherein said light exiting through said first light guiding plate is incident on said second light guiding plate, and exit through said second light guiding plate
- wherein said reflecting plate is provided below said first light guiding plate.
5 more elements
An illumination apparatus comprising:
- a first light guiding plate;
- a second light guiding plate;
- a reflecting plate;
- a point light source;
- and
- an electro-optical device,
- wherein a light emitted from said point light source is incident on said first light guiding plate and exit through said first light guiding plate, and
- wherein said light exiting through said first light guiding plate is incident on said second light guiding plate, and exit through said second light guiding plate
- wherein said light exiting through said second light guiding plate is incident on said electro-optical device,
- wherein said reflecting plate is provided below said first light guiding plate.
7 more elements
A liquid crystal display device comprising:
- a liquid crystal panel comprising a first substrate, a second substrate, and a liquid crystal interposed therebetween;
- and
- a illumination apparatus adjacent to said liquid crystal panel for illuminating an image display plane of said liquid crystal panel, said illumination apparatus comprising:
- a first light guiding plate;
- a second light guiding plate;
- a reflecting plate;
- and
- a point light source,
- wherein a light emitted from said point light source is incident on said first light guiding plate and exit through said first light guiding plate, and
- wherein said light exiting through said first light guiding plate is incident on said second light guiding plate, and exit through said second light guiding plate
- wherein said reflecting plate is provided below said first light guiding plate.
8 more elements
A liquid crystal display device comprising:
- a liquid crystal panel comprising a first substrate, a second substrate, and a liquid crystal interposed therebetween;
- and
- a illumination apparatus adjacent to said liquid crystal panel for illuminating an image display plane of said liquid crystal panel, said illumination apparatus comprising:
- a first light guiding plate;
- a second light guiding plate;
- a reflecting plate;
- a point light source;
- and
- an electro-optical device,
- wherein a light emitted from said point light source is incident on said first light guiding plate and exit through said first light guiding plate, and
- wherein said light exiting through said first light guiding plate is incident on said second light guiding plate, and exit through said second light guiding plate
- wherein said light exiting through said second light guiding plate is incident on said electro-optical device,
- wherein said reflecting plate is provided below said first light guiding plate.
10 more elements
Dependencies are inferred from the claim text.