Planar illuminating device and liquid crystal display device using the same
First Claim
1. A planar illuminating device comprising:
- a light source section that emits linearly polarized laser light;
a rod-like light guide including an end surface incident to the linearly polarized laser light emitted from the light source section, so as to receive, as incident laser light, the linearly polarized laser light emitted from the light source section and including a first side surface that emits the incident laser light received from the light source section; and
a light-guiding plate including an incident surface incident to the laser light emitted from the rod-like light guide, so as to receive the laser light emitted from the rod-like light guide and including an emitting surface that emits the laser light received from the rod-like light guide,wherein a cross section of the rod-like light guide that is orthogonal to a propagation direction of the incident laser light is rectangular,wherein the rod-like light guide includes a mirror array formed on at least one of;
a second side surface that is opposite to the first side surface; and
a third side surface and a fourth side surface adjacent to the first side surface,wherein the mirror array includes a plurality of reflecting surfaces that totally reflect the incident laser light received by the end surface, so as to emit the laser light from the first side surface, andwherein the linearly polarized laser light emitted from the light source section is incident to the end surface of the rod-like light guide while being polarized perpendicularly to the first side surface or the third side surface.
1 Assignment
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Accused Products
Abstract
Provided is a planar illuminating device having light source section (1) emitting linearly polarized laser light and having a light guide (12) with a rectangular parallelepiped shape having one main surface with a mirror array (12c) thereon. The mirror array (12c) has a plurality of reflecting surfaces totally reflecting laser light incident on an incident surface (12a), of the light guide, perpendicular to the one main surface and emits the laser light from an emitting surface (12b), of the light guide, perpendicular to the one main surface, wherein the reflecting surfaces are formed in a stepped manner. Further, the planar illuminating device includes a light-guiding plate (3) making the laser light, emitted from the light guide (12), incident on an incident surface (3a) of the light-guiding plate and emitting the laser light from an emitting surface (3b) of the light-guiding plate.
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Citations
20 Claims
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1. A planar illuminating device comprising:
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a light source section that emits linearly polarized laser light; a rod-like light guide including an end surface incident to the linearly polarized laser light emitted from the light source section, so as to receive, as incident laser light, the linearly polarized laser light emitted from the light source section and including a first side surface that emits the incident laser light received from the light source section; and a light-guiding plate including an incident surface incident to the laser light emitted from the rod-like light guide, so as to receive the laser light emitted from the rod-like light guide and including an emitting surface that emits the laser light received from the rod-like light guide, wherein a cross section of the rod-like light guide that is orthogonal to a propagation direction of the incident laser light is rectangular, wherein the rod-like light guide includes a mirror array formed on at least one of;
a second side surface that is opposite to the first side surface; and
a third side surface and a fourth side surface adjacent to the first side surface,wherein the mirror array includes a plurality of reflecting surfaces that totally reflect the incident laser light received by the end surface, so as to emit the laser light from the first side surface, and wherein the linearly polarized laser light emitted from the light source section is incident to the end surface of the rod-like light guide while being polarized perpendicularly to the first side surface or the third side surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification