Polarized light transmission screen and stereoscopic image displaying apparatus using the polarized light transmission screen
First Claim
1. A polarized light transmission screen capable to rotate a polarization axis of a linearly polarized light, comprising:
- a 90-degree rotation region including in piles a plurality of retarders of which directions of optical axes differ from one another, wherein each of said plurality of retarders rotates the polarization axis less than 90 degrees in steps so that said 90-degree rotation region rotates the polarization axis by 90 degrees in total by transmitting a linearly polarized light having a polarization axis of a specific direction; and
a 0-degree rotation region including in piles a plurality of retarders of which directions of optical axes differ from one another, wherein each of said plurality of retarders rotates the polarization axis to the both positive and negative directions by the same degree so that said 0-degree rotation region emits a linearly polarized light having a polarization axis with the same direction as a time of incidence by transmitting a linearly polarized light having a polarization axis of a specific direction.
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Accused Products
Abstract
A polarized light transmission screen and a stereoscopic image displaying apparatus capable to display a clear stereoscopic image with few little cross talks over a wide wavelength range. In a polarized light transmission screen 30, a 90-degree rotation regions 32b include in piles a plurality of retarders of which the directions of the optical axes differ with one another, and when the linearly polarized light having a polarization axis of a specific direction is made to be transmitted, they rotates the polarization axis by 90 degrees in total by each of the plurality of retarders rotating the polarization axis less than 90 degrees in steps. A 0-degree rotation regions 32a include in piles a plurality of retarders of which the directions of the optical axes differ with one another, and when the linearly polarized light having a polarization axis of a specific direction is made to be transmitted, the polarization axes of incidence and emission are the same direction.
39 Citations
15 Claims
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1. A polarized light transmission screen capable to rotate a polarization axis of a linearly polarized light, comprising:
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a 90-degree rotation region including in piles a plurality of retarders of which directions of optical axes differ from one another, wherein each of said plurality of retarders rotates the polarization axis less than 90 degrees in steps so that said 90-degree rotation region rotates the polarization axis by 90 degrees in total by transmitting a linearly polarized light having a polarization axis of a specific direction; and
a 0-degree rotation region including in piles a plurality of retarders of which directions of optical axes differ from one another, wherein each of said plurality of retarders rotates the polarization axis to the both positive and negative directions by the same degree so that said 0-degree rotation region emits a linearly polarized light having a polarization axis with the same direction as a time of incidence by transmitting a linearly polarized light having a polarization axis of a specific direction. - View Dependent Claims (2)
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3. A polarized light transmission screen capable to rotate a polarization axis of a linearly polarized light, comprising:
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a patterned retarder including first rotation regions which rotate a polarization axis of a linearly polarized light, having a specific direction, by +45 degrees and second rotation regions which rotate the polarization axis of the linearly polarized light by −
45 degrees, which are aligned alternately along a vertical direction; and
a unpatterned retarder which rotates each of the axis of the linearly polarized light rotated by said first rotation regions and the linearly polarized light rotated by said second rotation regions by −
45 degrees, wherein retardation property of said unpatterned retarder in the vertical direction is uniform. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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4. A polarized light transmission screen capable to rotate a polarization axis of a linearly polarized light, comprising:
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a patterned retarder including first rotation regions which rotate a polarization axis of a linearly polarized light, having a specific direction, by −
45 degrees and second rotation regions which rotate the linearly polarized light by +45 degrees, which are aligned alternately along a vertical direction; and
a unpatterned retarder which rotates each of the axis of the linearly polarized light rotated by said first rotation regions and the linearly polarized light rotated by said second rotation regions by +45 degrees, wherein retardation property of said unpatterned retarder in the vertical direction is uniform.
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5. A polarized light transmission screen capable to rotate a polarization axis of a linearly polarized light, comprising:
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a unpatterned retarder which rotates a polarization axis of a linearly polarized light, having a specific direction, by +45 degrees, wherein retardation property of said unpatterned retarder in a vertical direction is uniform; and
a patterned retarder including first rotation regions which rotate the polarization axis of the linearly polarized light by −
45 degrees and second rotation regions which rotate the polarization axis of the linearly polarized light by +45 degrees, which are aligned alternately along a vertical direction.
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6. A polarized light transmission screen capable to rotate a polarization axis of a linearly polarized light, comprising:
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a unpatterned retarder which rotates a polarization axis of a linearly polarized light, having a specific direction, by −
45 degrees, wherein retardation property of said unpatterned retarder in a vertical direction is uniform; and
a patterned retarder including first rotation regions which rotate the polarization axis of the linearly polarized light by +45 degrees and second rotation regions which rotate the polarization axis of the linearly polarized light by −
45 degrees, which are aligned alternately along a vertical direction.
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7. A polarized light transmission screen capable to rotate a polarization axis of a linearly polarized light, comprising:
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a patterned retarder alternately including along a vertical direction;
first rotation regions of which an optical axis forms ±
22.5 degrees with respect to the polarization axis of the linearly polarized light emitted into the polarized light transmission screen having a polarization axis of a specific direction; and
second rotation regions of which an optical principle axis forms ±
45 degrees with respect to the optical axis of said first rotation regions, wherein said first rotation regions and said second rotation regions are consist of half-wave retarders; and
a unpatterned retarder, which is a half-wave retarder of which a direction of an optical axis is uniform in the vertical direction, wherein a direction of the optical axis is perpendicular to the optical axis of said first rotation regions.
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Specification