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US 2019/0196213 A1Published application
Display device and method for displaying aerial image
AssigneeUtsunomiya University
InventorsHirotsugu Yamamoto, Ryosuke Kujime
Life of this patent
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Abstract
A display device as an embodiment of the present invention is provided with a light source, a light splitting portion for causing first emission light emitted from the light source to be surface-reflected as first reflected light, a retro-reflection portion for retro-reflecting the first reflected light toward the light splitting part as retro-reflected light, and a first light blocking portion for blocking surface-reflected light surface-reflected by the retro-reflection part toward an observation position of the retro-reflected light. The light splitting portion is configured to transmit at least some of the retro-reflected light.
Claims18
A display device comprising:
- a light source;
- a light splitting portion which is configured to surface-reflect at least some of first emission light emitted from the light source as first reflected light;
- a first retro-reflection portion which is configured to retro-reflect at least some of the first reflected light as retro-reflected light toward the light splitting portion;
- and
- a first light blocking portion which is configured to block surface-reflected light reflected by the first retro-reflection portion toward an observation position of the retro-reflected light,
- wherein the light splitting portion is configured to transmit at least some of the retro-reflected light retro-reflected by the first retro-reflection portion.
3 more elements
A display device comprising:
- a light source;
- a light splitting portion which is configured to surface-reflect at least some of first emission light emitted from the light source as first reflected light;
- a first retro-reflection portion which is configured to retro-reflect at least some of the first reflected light as retro-reflected light toward the light splitting portion;
- and
- a second light blocking portion which is configured to block direct irradiation light directly irradiated to an observation position of the retro-reflected light from the light source,
- wherein the light splitting portion is configured to transmit at least some of the retro-reflected light retro-reflected by the first retro-reflection portion.
3 more elements
A display device comprising:
- a display portion formed in a plate shape and has a light source on one plate surface thereof;
- a light splitting portion formed in a plate shape, disposed on a first emission axis which indicates an emission direction of first emission light emitted from the light source, disposed so that one plate surface thereof is inclined with respect to the one plate surface of the display portion, configured to transmit at least some of the first emission light as first transmitted light and has a light splitting surface which is configured to surface-reflect at least some of the retro-reflected light, on the one plate surface thereof;
- a first retro-reflection portion formed in a plate shape, having a retro-reflection surface, which is configured to retro-reflect at least some of the first transmitted light transmitted through the light splitting portion as retro-reflected light, on one plate surface thereof, and disposed on the first emission axis so that the retro-reflection surface is parallel to the light splitting surface of the light splitting portion while facing the display portion with the light splitting portion interposed therebetween;
- and
- an imaging portion formed in a plate shape, disposed on a first retro-reflection portion side of the light splitting portion along one plate surface of the light splitting portion, and configured to surface-reflect and image retro-reflected light retro-reflected by the first retro-reflection portion.
2 more elements
A display device comprising:
- a display portion formed in a plate shape and has a light source on one plate surface thereof;
- a light splitting portion formed in a plate shape, disposed on a first emission axis which indicates an emission direction of first emission light emitted from the light source, having a light splitting surface, which is configured to surface-reflect at least some of the first emission light as first reflected light, on the one plate surface thereof, and disposed so that the light splitting surface is opposed and inclined with respect to the one plate surface of the display portion;
- a first retro-reflection portion formed in a plate shape, having a retro-reflection surface, which is configured to retro-reflect at least some of the first reflected light surface-reflected by the light splitting surface as retro-reflected light, on one plate surface thereof, and disposed on a second emission axis which indicates a traveling direction of the first reflected light so that the retro-reflection surface is opposed and inclined with respect to the light splitting surface and the retro-reflection surface is perpendicular to one plate surface of the display portion;
- and
- an imaging portion formed in a plate shape, disposed on a side of the light splitting portion opposite to a side of the first retro-reflection portion along one plate surface of the light splitting portion, and configured to transmit retro-reflected light retro-reflected by the first retro-reflection portion and to image the first emission light,
- wherein the light splitting portion is configured to transmit at least some of the retro-reflected light.
3 more elements
A method for displaying an aerial image, comprising:
- emitting first emission light from a light source and reflecting at least some of the first emission light at a position on a first emission axis, which indicates an emission direction of the first emission light, as first reflected light toward a first retro-reflection portion with a light splitting portion;
- retro-reflecting at least some of the first reflected light at a position on a second emission axis, which indicates an emission direction of the first reflected light, as retro-reflected light toward the light splitting portion by the first retro-reflection portion;
- transmitting at least some of the retro-reflected light at the light splitting portion;
- and
- blocking surface-reflected light reflected by the first retro-reflection portion to an observation position of the retro-reflected light by a first light blocking portion.
2 more elements
A method for displaying an aerial image, comprising:
- emitting first emission light from a light source and reflecting at least some of the first emission light at a position on a first emission axis, which indicates an emission direction of the first emission light, as first reflected light toward a first retro-reflection portion by a light splitting portion;
- retro-reflecting at least some of the first reflected light at a position on a second emission axis, which indicates an emission direction of the first reflected light, as retro-reflected light toward the light splitting portion by the retro-reflection portion;
- transmitting at least some of the retro-reflected light at the light splitting portion;
- and
- blocking direct irradiation light directly irradiated to an observation position of the retro-reflected light from the light source by a second light blocking portion.
2 more elements
Dependencies are inferred from the claim text.