BACKLIGHT DEVICE AND LIQUID CRYSTAL DISPLAY APPARATUS
First Claim
1. A backlight device comprising:
- a light source arranged on the rear surface opposite to a light-emitting surface of a light-guiding plate, wherein a reflective-angle modified portion that modifies a reflective angle of light emitted from the light source is provided at least on said light-emitting surface and/or said rear surface of said light-guiding plate.
1 Assignment
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Accused Products
Abstract
A direct backlight device including a light source arranged on the rear surface of a light-guiding plate and a liquid crystal display apparatus including the backlight device are provided, in which light extracting efficiency from the light-guiding plate is improved and luminance can be prevented from lowering or can be improved. The backlight device includes a light source arranged on the rear surface opposite to a light-emitting surface, and a reflective-angle modified portion, for example, a concave-convex portion formed by sandblast to modify a reflective angle of light emitted from the light source is provided at least on the light-emitting surface and/or the rear surface. A light reflective angle equal to or smaller than the critical angle is modified to improve the light extracting efficiency from the light-emitting surface.
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Citations
6 Claims
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1. A backlight device comprising:
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a light source arranged on the rear surface opposite to a light-emitting surface of a light-guiding plate, wherein a reflective-angle modified portion that modifies a reflective angle of light emitted from the light source is provided at least on said light-emitting surface and/or said rear surface of said light-guiding plate. - View Dependent Claims (2, 3, 4, 5)
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6. A liquid crystal display apparatus comprising:
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a transmissive liquid crystal display panel and a backlight device illuminating said liquid crystal display panel from the rear surface side, wherein said backlight device includes a light source arranged on the rear surface opposite to a light-emitting surface of a light-guiding plate and a reflective-angle modified portion that modifies a reflective angle of light emitted from the light source is provided at least on said light-emitting surface and/or said rear surface of said light-guiding plate.
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Specification