Illuminating device and liquid-crystal display apparatus
First Claim
1. An illuminating device comprising light sources, a housing of said light sources that has its inner surfaces covered with a diffuse reflecting layer, an optical collimator for collimating light issued from said light sources and the light reflected by the diffuse reflecting layer, and a directivity regulating member for regulating directivity of the collimated light emerging from said optical collimator.
2 Assignments
0 Petitions
Accused Products
Abstract
The illuminating device includes light sources, a housing of the light sources that has its inner surfaces covered with a diffuse reflecting layer, an optical collimator for collimating the light issued from the light sources and the light reflected by the diffuse reflecting layer, and a directivity regulating member for regulating the directivity of the collimated light emerging from the optical collimator. The liquid-crystal display apparatus has a liquid-crystal display panel and the illuminating device. The illuminating device can emit collimated light of very high directivity and may be utilized in the liquid-crystal display apparatus to display images of high quality and contrast over a wide range of viewing angles.
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Citations
9 Claims
- 1. An illuminating device comprising light sources, a housing of said light sources that has its inner surfaces covered with a diffuse reflecting layer, an optical collimator for collimating light issued from said light sources and the light reflected by the diffuse reflecting layer, and a directivity regulating member for regulating directivity of the collimated light emerging from said optical collimator.
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5. A liquid-crystal display apparatus comprising:
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a liquid-crystal display panel; and
an illuminating device including light sources, a housing of said light sources that has its inner surfaces covered with a diffuse reflecting layer, an optical collimator for collimating light issued from said light sources and the light reflected by the diffuse reflecting layer, and a directivity regulating member for regulating directivity of the collimated light emerging from said optical collimator. - View Dependent Claims (6, 7, 8)
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8. The liquid-crystal display apparatus according to claim 5, wherein the following relation is satisfied:
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9. A liquid-crystal display apparatus comprising:
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a liquid-crystal display panel;
an illuminating device including light sources, a housing of said light sources that has its inner surfaces covered with a diffuse reflecting layer, an optical collimator for collimating light issued from said light sources and the light reflected by the diffuse reflecting layer, and a directivity regulating member for regulating directivity of the collimated light emerging from said optical collimator; and
a light diffusing plate for diffusing image-bearing light that has passed through said liquid-crystal display panel.
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Specification