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1.发明申请公开(公告)号：US20190302456A1
公开(公告)日：2019-10-03
申请号：US16363534
申请日：2019-03-25
Inventor： Kosuke KUBOTA , Ken'ichi KASAZUMI , Yoshiteru MINO , Toshiya MORI
Abstract: A display system according to an aspect includes a screen, a drive control unit, and a projection unit. The drive control unit has the screen moved in a movement direction. The projection unit renders an image on the screen by irradiating the screen with a light beam that scans the screen and projects a virtual image onto a projection plane with the light beam transmitted through the screen. The drive control unit has the screen moved in the movement direction such that an optical path leading to a rendering point on the screen varies its length according to a tilt angle defined by the projection plane with respect to a reference plane.
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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：US20220011574A1
公开(公告)日：2022-01-13
申请号：US17484905
申请日：2021-09-24
Inventor： Fumihito INUKAI , Toshiya MORI , Masanaga TSUJI , Ken'ichi KASAZUMI , Yukihiro CHOKYU
Abstract: An image display system includes: an image projection unit that projects and displays an image on a display target for a moving body; a posture angle calculation unit that calculates a posture angle for the moving body on the basis of chronological data for acceleration detection values for the acceleration of the moving body in a prescribed time period; and a display control unit that controls the display position at which the image is projected and displayed on the display target, in accordance with the posture angle calculated by the posture angle calculation unit. The acceleration detection values include bi-directional components. The posture angle calculation unit excludes acceleration detection values from the chronological data used when calculating the posture angle, said acceleration detection values being included in an exclusion time period which has a ratio for the bidirectional components, in the prescribed time period, that is outside a prescribed range.
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公开(公告)号：US20230018634A1
公开(公告)日：2023-01-19
申请号：US17951868
申请日：2022-09-23
Inventor： Toshiya MORI , Ken'ichi KASAZUMI
Abstract: A light guide body in a display device includes a first incident surface on which an image light is incident, and a second emission surface from which the image light is emitted. The light guide body includes a second emission optical element that diffracts the image light to emit a portion of the image light at a predetermined emission angle every time the image light enters the second emission optical element from a predetermined direction. The image light is diverged by being emitted from the second emission optical element such that the predetermined emission angle varies in accordance with a location in one predetermined region included in a plurality of predetermined regions of the optical element. The degree of divergence varies between the one predetermined region and other predetermined region included in the plurality of predetermined regions in accordance with the location of the virtual image.
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公开(公告)号：US20220013046A1
公开(公告)日：2022-01-13
申请号：US17484859
申请日：2021-09-24
Inventor： Toshiya MORI , Ken'ichi KASAZUMI , Satoru TANAHASHI , Shigeo KASAHARA
Abstract: A virtual image display system includes an image data producing unit, an image display, and an optical system. The image data producing unit produces, based on image data of a rendering target and position information about a display position of the target, image data to display a virtual image of the target. The image display displays, on a display screen, an image based on the image data to display the virtual image. The display screen is arranged to be tilted with respect to an optical path leading from the display screen to the optical system. The image data of the rendering target includes first image data of a stereoscopic rendering target. The image data producing unit produces, based on the first image data and position information about a display position of the stereoscopic rendering target, second image data to make the user view the stereoscopic rendering target stereoscopically.
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Patent Agency Ranking
公开(公告)号：US20220009414A1
公开(公告)日：2022-01-13
申请号：US17484976
申请日：2021-09-24
Inventor： Toshiya MORI , Ken'ichi KASAZUMI
IPC: B60R1/00 , H04N13/111 , H04N7/18 , H04N13/302 , H04N13/351 , G02B30/27
Abstract: An electronic mirror system presents circumstances surrounding a moving vehicle by displaying an image presenting the circumstances surrounding the moving vehicle. The electronic mirror system includes an image display and an optical system. The image display displays, every time image data is acquired from an image capturing unit, the image, based on the image data acquired from the image capturing unit, on a display screen. The image capturing unit continuously shoots video presenting the circumstances surrounding the moving vehicle. The optical system condenses, into an eye box, a light beam representing the image displayed on the display screen to make a user, who has a viewpoint inside the eye box, view a virtual image based on the image displayed on the display screen. The display screen is arranged to be tilted with respect to an optical path that leads from the display screen to the optical system (30).
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公开(公告)号：US20250116860A1
公开(公告)日：2025-04-10
申请号：US18983957
申请日：2024-12-17
Inventor： Kazuhiro MINAMI , Satoshi KUZUHARA , Ken'ichi KASAZUMI , Kosuke IMAWAKA
Abstract: A light guide includes an exit extension region including a diffraction structure dividing an image light ray propagating in a first direction intersecting a thickness direction of a body, into image light rays propagating in a second direction intersecting the first direction, in the first direction, and allowing them to emerge therefrom. At least one part of the region satisfies that when refractive indices of media on individual incident and exit sides of a ray relative to the region are assumed to be equal to each other, an exit angle θ_out of a ray emerging from the region at the highest diffraction efficiency in a plane including a normal line of the region is not smaller than 15° and is not greater than 45°, and an incident angle θ_in of a ray incident on the region in the plane is greater than θ_out by 14° or more.
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公开(公告)号：US20230018240A1
公开(公告)日：2023-01-19
申请号：US17953777
申请日：2022-09-27
Inventor： Ken'ichi KASAZUMI , Toshiya MORI
Abstract: A display device includes a light guide body and displays an image of light emitted from the light guide body. The light guide body is of a curved shape, and includes a light guide plate and an optical element that diffracts and emits light propagating inside the light guide plate. The optical element is provided in the light guide body so that the angle of the optical element relative to a propagation direction in which the light propagates inside the light guide plate is constant irrespective of where in the optical element.
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公开(公告)号：US20220113547A1
公开(公告)日：2022-04-14
申请号：US17560755
申请日：2021-12-23
Inventor： Fumihito INUKAI , Toshiya MORI , Masanaga TSUJI , Ken'ichi KASAZUMI
Abstract: A display control device is configured to control a display position of an image in an image projector configured to project the image onto a display object of a mobile body. The display control device includes a processor; and a memory storing instructions that, when executed by the processor, cause the display control device to perform operations including: acquiring a detection value of an acceleration acting on the mobile body; calculating an attitude angle of the mobile body based on the detection value of the acceleration; and setting a correction amount of the display position for controlling the display position of the image to be projected onto the display object by adjusting a correction amount per predetermined unit time in accordance with a change amount of the attitude angle in a predetermined period.
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公开(公告)号：US20200004015A1
公开(公告)日：2020-01-02
申请号：US16570203
申请日：2019-09-13
Inventor： Ken'ichi KASAZUMI , Toshiya MORI , Hiroaki OKAYAMA , Satoshi KUZUHARA , Hiroyuki FURUYA , Hiroshi GOTOU , Akira KUROZUKA
Abstract: A display device is provided and may include a light source that emits a light beam, a scanner that causes the light beam to scan, a movable screen in which an image is formed by transmitting the light beam from scanner, an optical system configured to project the image on a display medium, and a driver configured to cause the movable screen to reciprocate in moving directions. The image includes a first image and a second image. The movable screen reciprocates in a posture inclined with respect to the moving directions such that a second end of the movable screen is positioned closer to the scanner than a first end of the movable screen. The scanner forms the second image in the movable screen while the movable screen moves such that a forming direction of the second image is inclined with respect to a direction approaching the scanner.
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