Liquid-crystal display and a lighting apparatus
First Claim
1. A reflective liquid-crystal display, comprising:
- a reflective liquid-crystal panel;
a light guiding plate disposed on said reflective liquid-crystai panel;
a polarizer disposed between said reflective liquid-crystal panel and said light guiding plate; and
a light source disposed on a side surface of said light guiding plate, wherein;
light emitted from said light source propagates through said light guiding plate, the light having a primary direction; and
a smaller one of two angles between a projection of the primary direction onto said reflective liquid-crystal panel and an absorption axis of said light guiding plate is at least 50°
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Accused Products
Abstract
A liquid-crystal display includes a reflective liquid-crystal panel, a light guiding plate disposed on the reflective liquid-crystal panel, a polarizer arranged between a liquid-crystal layer of the reflective liquid-crystal panel and the light guiding plate, and a light source disposed on a side surface of the light guiding plate. Light emitted from the light source propagates through the light guiding plate and has a primary direction. A smaller one of two angles between a projection of the primary direction onto the reflective liquid-crystal panel and an absorption axis of the light guiding plate is at least 50°. This resultantly improves performance of the liquid-crystal display.
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Citations
33 Claims
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1. A reflective liquid-crystal display, comprising:
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a reflective liquid-crystal panel;
a light guiding plate disposed on said reflective liquid-crystai panel;
a polarizer disposed between said reflective liquid-crystal panel and said light guiding plate; and
a light source disposed on a side surface of said light guiding plate, wherein;
light emitted from said light source propagates through said light guiding plate, the light having a primary direction; and
a smaller one of two angles between a projection of the primary direction onto said reflective liquid-crystal panel and an absorption axis of said light guiding plate is at least 50°
. - View Dependent Claims (7, 11, 15, 17, 18, 19, 20, 21, 23)
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2. A reflective liquid-crystal display, comprising:
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a reflective liquid-crystal panel;
a light guiding plate disposed on said reflective liquid-crystal panel;
a polarizer disposed between said reflective liquid-crystal panel and said light guiding plate;
a light source disposed on a side surface of said light guiding plate, wherein;
light emitted from said light source propagates through said light guiding plate and is emitted from said light guiding plate toward said polarizer, the light having a primary direction; and
a smaller one of two angles between a projection of the primary direction onto said reflective liquid-crystal panel and an absorption axis of said light guiding plate is more than 0° and
at most 40°
. - View Dependent Claims (8, 12)
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3. A reflective liquid-crystal display, comprising:
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a reflective liquid-crystal panel;
a light guiding plate disposed on said reflective liquid-crystal panel;
a polarizer disposed between said reflective liquid-crystal panel and said light guiding plate; and
a light source disposed on a side surface of said light guiding plate, wherein;
light emitted from said light source propagates through said light guiding plate, the light including primary polarized light; and
a smaller one of two angles between a projection of a direction of the primary polarized light onto said reflective liquid-crystal panel and an absorption axis of said light guiding plate is at least 50°
. - View Dependent Claims (5, 9, 13)
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4. A reflective liquid-crystal display, comprising:
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a reflective liquid-crystal panel;
a light guiding plate disposed on said reflective liquid-crystal panel;
a polarizer disposed between said reflective liquid-crystal panel and said light guiding plate;
a light source disposed on a side surface of said light guiding plate, wherein;
light incident to said reflective liquid-crystal panel has primary polarized light; and
a smaller one of two angles between a projection of a direction of the primary polarized light onto said reflective liquid-crystal panel and an absorption axis of said light guiding plate is at least 50°
. - View Dependent Claims (6, 10, 14)
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16. A lighting apparatus, comprising:
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a light guiding plate; and
a light source disposed on a side surface of said light guiding plate, wherein said light guiding plate has a flat first surface having a plurality of projections, each said projection is formed with a first inclined plane having a first angle between said plane and said flat first surface and a second inclined plane formed adjacent to said first inclined plane with a second angle between said plane and said flat first surface, said second angle being larger than said first angle, said lighting apparatus further comprising a light preventive layer preventing light from passing therethrough on each said second inclined plane.
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22. A reflective liquid-crystal display, comprising:
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a lighting apparatus, comprising a light guiding plate including a flat first surface having a plurality of projections, each said projection being formed with a first inclined plane having a first angle between said plane and said flat first surface and with a second inclined plane formed adjacent to said first inclined plane with a second angle between said plane and said flat first surface, said second angle being larger than said first angle and a light source disposed on a side surface of said light guiding plate;
a reflective liquid-crystal panel disposed on a second surface of said light guiding plate, said second surface opposing said first surface, said reflective liquid-crystal panel opposing said first surface;
a polarizer disposed between said reflective liquid-crystal panel and said light guiding plate; and
a low-refractive-index layer formed between said polarizer and said light guiding plate, said low-refractive-index layer having a refractive index smaller than a refractive index of said light guiding plate. - View Dependent Claims (24, 26, 27, 28, 30, 31)
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25. A reflective liquid-crystal display, comprising:
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a transparent first substrate;
a first electrode formed on said first substrate;
a second substrate having a light absorbing function;
a second electrode formed on said second substrate;
a uniform-refractive-index layer formed on said first electrode in a state in which said first and second substrates are arranged with said first and second electrodes being opposing each other, said uniform-refractive-index layer including a surface having projections and depressions, said uniform-refractive-index layer having a substantially uniform refractive index;
a liquid-crystal layer sandwiched between said first and second substrates, said liquid-crystal layer forming a boundary plane between said liquid-crystal layer and said uniform-refractive-index layer; and
voltage applying means for applying voltages to said first and second electrodes, wherein said projections and depressions of the boundary plane has an amplitude H and a pitch P, said amplitude H being at least 0.5 time of the pitch P.
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29. A lighting apparatus, comprising:
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a planar member, comprising a transparent first electrode, a uniform-refractive-index layer formed on said first electrode, said uniform-refractive-index layer including a surface having projections and depressions, said uniform-refractive-index layer having a substantially uniform refractive index, a scattering liquid-crystal layer formed on said uniform-refractive-index layer, said scattering liquid-crystal layer forming a boundary plane between said scattering liquid-crystal layer and said uniform-refractive-index layer, said scattering liquid-crystal layer being capable of changing a scattering characteristic thereof by changing an applied voltage applied thereto, a second electrode formed on said scattering liquid-crystal layer; and
a light-emitting device disposed on an end section of said planar member.
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32. A liquid-crystal display, comprising:
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a liquid-crystal panel, comprising a transparent first substrate, a transparent first electrode formed on said first substrate, a uniform-refractive-index layer formed on said first electrode, said uniform-refractive-index layer including a surface having projections and depressions, said uniform-refractive-index layer having a substantially uniform refractive index, a scattering liquid-crystal layer formed on said uniform-refractive-index layer, said scattering liquid-crystal layer forming a boundary plane between said scattering liquid-crystal layer and said uniform-refractive-index layer, said scattering liquid-crystal layer being capable of changing a scattering characteristic thereof by changing an applied voltage applied thereto, a second substrate, a second electrode formed on said second substrate, said second electrode being in contact with said scattering liquid-crystal layer, and voltage applying means for applying voltages to said first and second electrodes, either one of said first and second electrodes being partitioned for each pixel area;
a planar member disposed opposing said liquid-crystal panel; and
a lighting apparatus comprising a light emitting device at an end section of said planar member. - View Dependent Claims (33)
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Specification