Method of making a parallax barrier, parallax barrier and autostereoscopic display
First Claim
Patent Images
1. A method of making a parallax barrier, comprising the steps of:
- providing a first mask having a plurality of elongate opaque regions with longitudinal axes, said opaque regions being interleaved, in a first direction perpendicular to said longitudinal axes of said opaque regions, with a plurality of transparent regions;
exposing, during an exposure period, a photographic material to light from a light source through said first mask while, during at least part of said exposure period, moving at least one of said first mask, said material and said light source relative to at least one other of said first mask, said material and said light source so as to vary an exposure of each region of said material for forming a slit edge of said parallax barrier; and
developing said exposed material to form said parallax barrier.
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Abstract
A parallax barrier is made by developing a film exposed through a mask having elongate opaque regions interleaved with transparent regions. The film is exposed by a light source through the mask while the mask is moved so as to vary the exposure of each region of the film for forming the parallax barrier slit edges. Alternatively, the film or the light source may be moved during exposure. It is thus possible to make soft edge barriers, for example for use in autostereoscopic 3D displays.
18 Citations
18 Claims
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1. A method of making a parallax barrier, comprising the steps of:
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providing a first mask having a plurality of elongate opaque regions with longitudinal axes, said opaque regions being interleaved, in a first direction perpendicular to said longitudinal axes of said opaque regions, with a plurality of transparent regions;
exposing, during an exposure period, a photographic material to light from a light source through said first mask while, during at least part of said exposure period, moving at least one of said first mask, said material and said light source relative to at least one other of said first mask, said material and said light source so as to vary an exposure of each region of said material for forming a slit edge of said parallax barrier; and
developing said exposed material to form said parallax barrier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A parallax barrier made by a method providing a first mask having a plurality of elongate opaque regions with longitudinal axes, said opaque regions being interleaved, in a first direction perpendicular to said longitudinal axes of said opaque regions, with a plurality of transparent regions;
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exposing, during an exposure period, a photographic material to light from a light source through said first mask while, during at least part of said exposure period, moving at least one of said first mask, said material and said light source relative to at least one other of said first mask, said material and said light source so as to vary an exposure of each region of said material for forming a slit edge of said parallax barrier; and
developing said exposed material to form said parallax barrier.
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18. An autostereoscopic three dimensional display comprising a parallax barrier made by a method providing a first mask having a plurality of elongate opaque regions with longitudinal axes, said opaque regions being interleaved, in a first direction perpendicular to said longitudinal axes of said opaque regions, with a plurality of transparent regions;
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exposing, during an exposure period, a photographic material to light from a light source through said first mask while, during at least part of said exposure period, moving at least one of said first mask, said material and said light source relative to at least one other of said first mask, said material and said light source so as to vary an exposure of each region of said material for forming a slit edge of said parallax barrier; and
developing said exposed material to form said parallax barrier.
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Specification