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US 12,547,064 B2Granted
Screen, image projection system, and vehicle
AssigneeSony Group Corporation
InventorsKoji Miura, Shogo Kubota
Life of this patent
Estimating the term…
Abstract
There is provided a screen that displays an image in accordance with emission of image light including light in a predetermined polarized state as a major component and includes a corrugated surface and an optical element unit. The corrugated surface includes a plurality of reflection surfaces, the plurality of reflection surfaces having light transmissivity and diffusing and reflecting the emitted image light. The optical element unit is configured in accordance with a polarized state of the image light on a second side opposite to a first side of the corrugated surface on which the image light is emitted, restricts transmission of the image light to the second side, and transmits at least part of light entering from the second side.
Claims17
A screen, comprising:
- a corrugated surface including a plurality of reflection surfaces, wherein
- an image projection apparatus emits image light on a first side of the screen;
- the screen is configured to display an image based on the emitted image light,
- the emitted image light includes light in a specific polarized stated as a major component,
- the corrugated surface is on the first side of the screen,
- the plurality of reflection surfaces have light transmissivity, and
- each of the plurality of reflection surfaces diffuses and reflects the emitted image light;
- and
- an optical element unit that has a configuration based on the specific polarized state of the emitted image light, wherein
- the optical element unit is on a second side of the screen,
- the second side is opposite to the first side,
- the optical element unit is configured to:
- restrict transmission of the emitted image light to the second side;
- and
- transmit, to the first side, at least part of specific light that enters from the second side, and
- the optical element unit includes:
- a first polarizing plate that has a first direction of a light shielding axis;
- a quarter wave plate on the first polarizing plate in a direction of the second side, wherein
- the quarter wave plate is configured to convert linearly polarized light to circularly polarized light, and
- the linearly polarized light has the first direction as a polarization direction;
- and
- a second polarizing plate on the quarter wave plate in the direction of the second side, wherein
- the second polarization plate has a second direction of a light shielding axis, and
- the first direction is orthogonal to the second direction.
21 more elements
An image projection system, comprising:
- an image projection apparatus configured to emit image light of a first side of a screen, wherein the emitted image light includes light in a specific polarized state as a major component;
- and
- the screen including:
- a corrugated surface including a plurality of reflection surfaces, wherein
- the plurality of reflection surfaces have light transmissivity, and
- each of the plurality of reflection surfaces diffuses and reflects the emitted image light;
- and
- an optical element unit that has a configuration based on the specific polarized state of the emitted image light, wherein
- the optical element unit is on a second side of the screen,
- the second side is opposite to the first side,
- the optical element unit is configured to:
- restrict transmission of the emitted image light to the second side;
- and
- transmit, to the first side, at least part of specific light that enters from the second side, and
- the optical element unit includes:
- a first polarizing plate that has a first direction of a light shielding axis;
- a quarter wave plate on the first polarizing plate in a direction of the second side, wherein
- the quarter wave plate is configured to convert linearly polarized light to circularly polarized light, and
- the linearly polarized light has the first direction as a polarization direction;
- and
- a second polarizing plate on the quarter wave plate in the direction of the second side, wherein
- the second polarization plate has a second direction of a light shielding axis, and
- the first direction is orthogonal to the second direction.
20 more elements
A vehicle, comprising:
- an image projection apparatus configured to emit image light of a first side of a screen, wherein the emitted image light includes light in a specific polarized state as a major component;
- and
- the screen including:
- a corrugated surface including a plurality of reflection surfaces, wherein
- the plurality of reflection surfaces have light transmissivity, and
- each of the plurality of reflection surfaces diffuses and reflects the emitted image light;
- and
- an optical element unit that has a configuration based on the specific polarized state of the emitted image light, wherein
- the optical element unit is on a second side of the screen,
- the second side is opposite to the first side,
- the optical element unit is configured to:
- restrict transmission of the emitted image light to the second side;
- and
- transmit, to the first side, at least part of specific light that enters from the second side, and
- the optical element unit includes:
- a first polarizing plate that has a first direction of a light shielding axis;
- a quarter wave plate on the first polarizing plate in a direction of the second side, wherein
- the quarter wave plate is configured to convert linearly polarized light to circularly polarized light, and
- the linearly polarized light has the first direction as a polarization direction;
- and
- a second polarizing plate on the quarter wave plate in the direction of the second side, wherein
- the second polarization plate has a second direction of a light shielding axis, and
- the first direction is orthogonal to the second direction.
20 more elements
Dependencies are inferred from the claim text.