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公开(公告)号：US20240402492A1
公开(公告)日：2024-12-05
申请号：US18802672
申请日：2024-08-13
Inventor： Satoshi KUZUHARA , Hiroaki OKAYAMA
IPC: G02B27/01
Abstract: A head-up display is configured to project an image on a transparent reflection member to cause an observer to visually recognize a virtual image, and includes a display device configured to display the image, and a projection optical system configured to project the image displayed by the display device as the virtual image for the observer. The projection optical system is configured to form the image as an intermediate image, and includes a first optical element configured to condense light, a first lens configured to condense light, and a second optical element configured to diffuse light. The first optical element, the first lens, and the second optical element are disposed in this order along an optical path from the display device.
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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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E
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4
E
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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：US20240077721A1
公开(公告)日：2024-03-07
申请号：US18503780
申请日：2023-11-07
Inventor： Satoshi KUZUHARA , Hiroaki OKAYAMA
CPC classification number: G02B27/0101 , B60R11/0229 , B60R2011/0026
Abstract: A head-up display is configured to project an image on a transparent reflection member to cause an observer to visually recognize a virtual image, and includes a display device configured to display the image, and a projection optical system configured to project the image displayed by the display device as the virtual image for the observer. The projection optical system is configured to form an image as an intermediate image, and includes a first lens configured to condense light, and a first optical element configured to diffuse light. The first lens and the first optical element are disposed in this order along an optical path from the display device. The first lens is inclined with respect to a reference beam which is defined as a beam reaching a center of a viewpoint region of the observer and corresponding to a center of the virtual image.
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公开(公告)号：US20170184843A1
公开(公告)日：2017-06-29
申请号：US15383401
申请日：2016-12-19
Inventor： Satoshi KUZUHARA , Hiroaki OKAYAMA
CPC classification number: G02B27/0101 , G02B17/008 , G02B17/0848 , G02B2027/0123 , G02B2027/0145 , G02B2027/0147 , G02B2027/015
Abstract: A head-up display that allows an observer to visually recognize a virtual image in a viewpoint region of the observer is provided. The head-up display includes: a display device that has a display surface and displays an image on the display surface; and a first optical system that has a concave mirror, and a lens condensing the light and disposed between the concave mirror and the display surface. The first optical system causes a beam exiting from the display surface to form an intermediate image via the lens and the concave mirror, the intermediate image being enlarged from the image displayed on the display surface.
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Patent Agency Ranking
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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公开(公告)号：US20250013052A1
公开(公告)日：2025-01-09
申请号：US18887381
申请日：2024-09-17
Inventor： Satoshi KUZUHARA , Akira HASHIYA , Kazuhiro MINAMI
Abstract: The optical system includes: a light guide for guiding an image light ray to a field of view region of a user as a virtual image. The light guide includes a diffraction structure region constituting a surface-relief diffraction grating dividing the image light ray propagating in a first propagation direction intersecting a thickness direction of a body into a plurality of image light rays propagating in a second propagation direction intersecting the first propagation direction, in the first propagation direction. The diffraction structure region includes a first diffraction structure, and a second diffraction structure on an opposite side of the first diffraction structure from an in-coupling region in the first propagation direction. A grating height of the first diffraction structure is greater than a grating height of the second diffraction structure. A grating width of the first diffraction structure is greater than a grating width of the second diffraction structure.
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公开(公告)号：US20240019621A1
公开(公告)日：2024-01-18
申请号：US18373753
申请日：2023-09-27
Inventor： Keiji SUGIYAMA , Ken'ichi KASAZUMI , Yukihiro CHOKYU , Satoshi KUZUHARA , Kazuhiro MINAMI
CPC classification number: G02B6/0041 , G02B6/0076 , G02B5/32 , G02B6/0031
Abstract: A light guide plate includes a hologram element that is a first hologram element including two or more diffraction cells, and a hologram element that is a second hologram element including a single diffraction cell.
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公开(公告)号：US20230393395A1
公开(公告)日：2023-12-07
申请号：US18236050
申请日：2023-08-21
Inventor： Kazuhiro MINAMI , Satoshi KUZUHARA
CPC classification number: G02B27/0103 , G02B27/0081 , G02B2027/013
Abstract: A head-up display system includes a display that emits a light flux visually recognized by an observer as the virtual image, and a light guide body that guides the light flux to the light-transmitting member. 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, the light flux is replicated into a plurality of light fluxes in a direction perpendicular to a horizontal direction of the virtual image visually recognized by the observer to be emitted from the emission surface so as to expand a visual recognition region.
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