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公开(公告)号：US20240231109A1
公开(公告)日：2024-07-11
申请号：US18611990
申请日：2024-03-21
Inventor： Satoshi KUZUHARA , Kazuhiro MINAMI , Hiroaki OKAYAMA
CPC classification number: G02B27/0172 , G02B6/262 , G02B6/34 , G02B2027/0118 , G02B2027/0123
Abstract: The optical system includes a light guide guiding an image light ray including a first light ray with a first wavelength range and a second light ray with a second wavelength range having wavelengths shorter than wavelengths in the first wavelength range, to a field of view region as a virtual image. The light guide includes a first dividing region including first dividing points dividing the incident first light ray and a second dividing region including second dividing points dividing the incident second light ray. The first dividing points include first and second points respectively corresponding to first and second peripheral regions of the field of view region. The second dividing points include third and fourth points respectively corresponding to the first and second peripheral regions. Dividing efficiencies E1 to E4 at the first to fourth points satisfy the following formula (1).
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公开(公告)号：US20240111152A1
公开(公告)日：2024-04-04
申请号：US18536662
申请日：2023-12-12
Inventor： Kazuhiro MINAMI , Satoshi KUZUHARA
CPC classification number: G02B27/0101 , G02B6/4214 , G09G3/002 , G02B2027/0118 , G02B2027/014 , G09G2360/145 , G09G2380/10
Abstract: An image display device includes a display, a light guide body, a controller, and a sensor. The light guide body includes an incident surface on which the light flux from the display is incident and an emission surface from which the light flux is emitted from the light guide body. The light flux incident on the incident surface of the light guide body is changed in a traveling direction in the light guide body, and is emitted from the emission surface so as to expand a visual field area by being replicated in a horizontal direction and a vertical direction of the virtual image visually recognized by the observer. The sensor that detects a physical quantity used to obtain a wavelength of the light flux. The controller controls a position and a shape of the image displayed by the display based on the physical quantity detected by the sensor.
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公开(公告)号：US20240027762A1
公开(公告)日：2024-01-25
申请号：US18375305
申请日：2023-09-29
Inventor： Ken'ichi KASAZUMI , Keiji SUGIYAMA , Yukihiro CHOKYU , Masafumi SUEYOSHI , Kazuhiro MINAMI
IPC: G02B27/01
CPC classification number: G02B27/0103 , G02B2027/0105
Abstract: A light guide plate includes a first hologram element including a plurality of diffraction cells. At least one of edge lines of one diffraction cell among the plurality of diffraction cells included in the first hologram element is located at a position other than on extensions of all edge lines of an adjacent diffraction cell adjacent to the one diffraction cell, the adjacent diffraction cell being included in the plurality of diffraction cells.
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公开(公告)号：US20190273899A1
公开(公告)日：2019-09-05
申请号：US16419504
申请日：2019-05-22
Inventor： Kazuhiro MINAMI
IPC: H04N9/31
Abstract: A projection system includes an invisible light projector, an imaging unit, an image generator, and a visible light projector. The invisible light projector projects a predetermined invisible light image onto the object via invisible light. The imaging unit captures an image of the invisible light projected from the invisible light projector. The image generator measures a shape of the object based on the image captured by the imaging unit to generate image data showing image content for projection onto the object in accordance with the measured shape. The visible light projector projects the image content shown by the image data onto the object via visible light. The invisible light projector emits pulsed invisible light to project the measurement pattern. The image generator generates the image data based on an image captured in accordance with a timing for the pulsed light emission.
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公开(公告)号：US20180146178A1
公开(公告)日：2018-05-24
申请号：US15873283
申请日：2018-01-17
Inventor： Kazuhiro MINAMI
IPC: H04N9/31
CPC classification number: H04N9/3155 , H04N9/3161 , H04N9/3164 , H04N9/3185 , H04N9/3194
Abstract: A projection system includes an invisible light projector, an imaging unit, an image generator, and a visible light projector. The invisible light projector projects a predetermined invisible light image onto the object via invisible light. The imaging unit captures an image of the invisible light projected from the invisible light projector. The image generator measures a shape of the object based on the image captured by the imaging unit to generate image data showing image content for projection onto the object in accordance with the measured shape. The visible light projector projects the image content shown by the image data onto the object via visible light. The invisible light projector emits pulsed invisible light to project the measurement pattern. The image generator generates the image data based on an image captured in accordance with a timing for the pulsed light emission.
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Patent Agency Ranking
公开(公告)号：US20250130424A1
公开(公告)日：2025-04-24
申请号：US18984039
申请日：2024-12-17
Inventor： Kazuhiro MINAMI , Satoshi Kuzuhara
IPC: G02B27/01
Abstract: An image display device for causing an optical image to be visible including: a display to emit image light; and a light guide to guide the image light from the display to an outside. The light guide has principal surfaces, including: an incident region to diffract the image to propagate inside the light guide by reflection between principal surfaces, in response to incidence of the image light from the display; and an expansion region to diffract the propagated image light to emit the diffracted image light as beams of image light from positions. The image light propagated to the expansion region has a first polarization state polarized along a direction parallel or perpendicular to a plane including a normal direction in the expansion region and a propagation direction by setting the image light incident on the incident region to have a second polarization state different from the first polarization state.
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公开(公告)号：US20190253679A1
公开(公告)日：2019-08-15
申请号：US16270740
申请日：2019-02-08
Inventor： Chiharu TSUBOTA , Ryuji FUCHIKAMI , Kazuhiro MINAMI
CPC classification number: H04N9/3194 , G01B11/25 , G01S17/06 , G03B17/54 , G03B21/26 , G06F3/011 , G06F3/04166 , G06F3/0425 , G06F2203/04101 , G06T7/521 , H04N5/30 , H04N9/3147 , H04N9/3185
Abstract: A projection system for projecting an image comprises: a visible light projector that projects the image with visible light; an invisible light projector that projects an invisible light image onto the object with invisible light; an imaging device that captures the invisible light image projected from the invisible light projector; and a controller that obtains information regarding reflected light from the object while obtaining three-dimensional measurements of the object to control the image, based on a capture image. The invisible light image includes a bright region and a dark region having a light amount less than the light amount of the bright region. The invisible light projector emits the invisible light to cause the light amount of the dark region in the invisible light image to be more than or equal to an offset value.
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公开(公告)号：US20170347076A1
公开(公告)日：2017-11-30
申请号：US15581735
申请日：2017-04-28
Inventor： Ryuji FUCHIKAMI , Kazuhiro MINAMI , Yuji SUGISAWA , Hideyuki NAKAMURA
CPC classification number: H04N9/3179 , G06T7/60 , H04N9/3164 , H04N9/3185 , H04N9/3194
Abstract: An image projection system includes an infrared ray projection apparatus that projects a pattern image for shape measurement toward a projection target, an imaging device that captures the pattern image, a calculation device that acquires three-dimensional shape information of the projection target based on the captured pattern image and converts a content image into a projection content image corresponding to the projection target based on the three-dimensional shape information, and a visible light projection apparatus that is disposed in a different position from the infrared ray projection apparatus and projects the projection content image toward the projection target, in which the calculation device, based on images of a visible light image projected by the visible light projection apparatus and a non-visible light image projected by the infrared ray projection apparatus, executes processing of associating each pixel of the non-visible light image with each pixel of the visible light image.
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公开(公告)号：US20250116861A1
公开(公告)日：2025-04-10
申请号：US18984015
申请日：2024-12-17
Inventor： Kazuhiro MINAMI , Satoshi KUZUHARA
Abstract: The optical system includes a light guide including: an incident region allowing an image light ray to enter a body; and an exit extension region including a diffraction structure dividing an image light ray into image light rays and allowing them to emerge from the body. The exit extension region divides the image light ray into first to third image light rays. The first and third image light rays emerge from the exit extension region at different angles to propagate inside the body. The exit extension region includes an overlap part on which the first image light ray and the third image light ray are incident under a condition where they partially overlap with each other. A difference between optical paths of the first image light ray and the third image light ray incident on the overlap part is longer than a coherence length of the image light ray.
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公开(公告)号：US20250020933A1
公开(公告)日：2025-01-16
申请号：US18892794
申请日：2024-09-23
Inventor： Satoshi KUZUHARA , Akira HASHIYA , Kazuhiro MINAMI
IPC: G02B27/01
Abstract: The optical system includes a light guide including a reproduction region including a dividing diffraction structure dividing an image light ray propagating in a first propagation direction intersecting a thickness direction of a body, into image light rays propagating in a second propagation direction intersecting the first propagation direction, in the first propagation direction and including first and second diffraction structure regions formed respectively at first and second surfaces in the thickness direction to face each other, and an exit diffraction structure allowing the image light rays propagating in the second propagation direction to travel toward a field of view region. When first and second field of view angles in first and second directions of the virtual image are denoted by FOV1 and FOV2, a relation of FOV2/FOV1
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