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公开(公告)号：US12196959B2
公开(公告)日：2025-01-14
申请号：US18503780
申请日：2023-11-07
Inventor： Satoshi Kuzuhara , Hiroaki Okayama
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：US20240319485A1
公开(公告)日：2024-09-26
申请号：US18679937
申请日：2024-05-31
Inventor： Tsuneo Uchida , Satoshi Kuzuhara
CPC classification number: G02B17/0816 , G02B13/16
Abstract: The present disclosure is directed to an optical system having a reduction conjugate point on a reduction side and a magnification conjugate point on a magnification side, and internally having an intermediate imaging position having a conjugate relationship with each of the reduction conjugate point and the magnification conjugate point, the optical system including: a prism provided on the magnification side, the prism formed of a transparent medium; and a sub-optical system provided between the reduction conjugate point and the prism, the sub-optical system, wherein the prism includes a first transmission surface positioned on the reduction side, a second transmission surface positioned on the magnification side, and at least one reflection surface positioned therebetween, wherein the following Expression is satisfied: 0.40
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公开(公告)号：US12085713B2
公开(公告)日：2024-09-10
申请号：US17846888
申请日：2022-06-22
Inventor： Satoshi Kuzuhara , Hiroaki Okayama
CPC classification number: G02B27/0101 , G02B2027/013 , G02B2027/0183 , G02B2027/0187
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：US20240103223A1
公开(公告)日：2024-03-28
申请号：US18531891
申请日：2023-12-07
Inventor： Satoshi Kuzuhara , Kazuhiro Minami
CPC classification number: G02B6/264 , G02B6/34 , G02B27/0172
Abstract: An optical system includes a light guide for guiding an image light ray which is output from a display element and forms an image, to a field of view region of a user as a virtual image. The light guide includes a body having a plate shape, and an in-coupling region and an exit region which are formed in the body. The in-coupling region allows the image light ray incident from the display element to propagate within the body. The exit region allows the image light ray propagating within the body to emerge from the body toward the field of view region. The in-coupling region includes a periodic structure constituted by recessed or protruded parts in relation to a thickness direction of the body which are arranged to have periodicity in three predetermined directions intersecting each other within a predetermined plane perpendicular to the thickness direction of the body.
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公开(公告)号：US11703683B2
公开(公告)日：2023-07-18
申请号：US17060706
申请日：2020-10-01
Inventor： Satoshi Kuzuhara , Hiroaki Okayama
CPC classification number: G02B27/0101 , B60K35/00 , G02B13/18 , G02B17/08 , B60K2370/1529 , B60K2370/23 , B60K2370/336 , G02B2027/0118
Abstract: A head-up display includes a display device and a projection optical system; the projection optical system includes first and second optical elements arranged in order of an optical path from the image; and when optical paths corresponding to an upper end and a lower end of the virtual image are defined as an upper ray and a lower ray, respectively, and a diverging effect and a converging effect are defined as being negative and positive, respectively, the first and the second optical elements satisfy conditional expressions P_u1−P_l1 0 (where P_u1 denotes a local power of the first optical element acting on the upper ray, P_l1 denotes a local power of the first optical element acting on the lower ray, P_u2 denotes a local power of the second optical element acting on the upper ray, P_l2 denotes a local power of the second optical element acting on the lower ray).
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Patent Agency Ranking
公开(公告)号：USRE49561E1
公开(公告)日：2023-06-27
申请号：US17474486
申请日：2021-09-14
Inventor： Satoshi Kuzuhara
CPC classification number: G02B5/10 , B60K35/00 , G02B27/01 , G02B27/0101 , G02B27/0149 , G03B21/28 , G03B21/62 , G02B2027/011 , G02B2027/013 , G02B2027/014 , G02B2027/0123 , G02B2027/0141 , G02B2027/0181 , H04N5/64
Abstract: A display apparatus includes a display unit that projects an image to a light transmissive display member. The display unit is configured to accommodate a display device and a projection optical system that projects the image displayed on the display device to the display member in a housing including an opening through which projected light is output. The projection optical system includes a first reflecting member disposed on a display device side and a second reflecting member disposed on an opening side in an optical path extending from the display device to the opening. A reflection surface of the first reflecting member that reflects the image displayed on the display device has a convex shape of a free-form surface, and a reflection surface of the second reflecting member that projects the image to the display member has a concave shape of a free-form surface.
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公开(公告)号：US11137599B2
公开(公告)日：2021-10-05
申请号：US16437981
申请日：2019-06-11
Inventor： Hiroaki Okayama , Satoshi Kuzuhara , Masahito Ogata , Toshiya Mori , Ken'ichi Kasazumi , Masafumi Sueyoshi
IPC: G03B21/56 , G02B27/01 , H04N5/74 , H04N13/30 , H04N5/64 , B60R11/02 , G02B30/00 , G03B21/28 , B60K35/00 , G02B26/10
Abstract: In a display device, an irradiation unit includes an imaging optical system. The imaging optical system scans and irradiates a front surface of a screen with light to form an image. The light passing through the screen and output from the screen in a movement direction is incident on a projection unit as incident light. The projection unit irradiates a reflective member with the incident light to allow the reflective member to reflect the incident light to form a virtual image corresponding to the image in a target space. A locus of a focal position of the imaging optical system when the irradiation unit wholly scans the front surface of the screen is within a range between the front surface of the screen at a first position and the front surface of the screen at a second position.
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公开(公告)号：US10705334B2
公开(公告)日：2020-07-07
申请号：US15738645
申请日：2016-06-13
Inventor： Ken'ichi Kasazumi , Toshiya Mori , Hiroaki Okayama , Satoshi Kuzuhara
Abstract: To provide a display device that can suppress generation of a double image. Display device includes plate-shape windshield having translucency and a projection unit that projects light expressing an image onto windshield such that the light is reflected toward a user by windshield. The projection unit changes a display distance between an eye of the user and a position of an image visually recognized as a virtual image by the user through windshield by the light projection. Windshield is formed such that a wedge angle that is of an angle formed between a front side and a back side at a region located at any level of windshield is continuously decreased with increasing level.
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公开(公告)号：US10451872B2
公开(公告)日：2019-10-22
申请号：US15849799
申请日：2017-12-21
Inventor： Ken'ichi Kasazumi , Toshiya Mori , Hiroaki Okayama , Satoshi Kuzuhara , Hiroyuki Furuya , Hiroshi Gotou , Akira Kurozuka
IPC: G02B27/01 , G02B26/10 , H04N13/393 , B60K35/00 , H04N9/31 , H04N13/363
Abstract: The present invention provides a display device that can easily perform control for driving a movable screen. Display device includes light source that emits a light beam, scanner that causes the light beam from light source to scan, movable screen in which a first image is formed by transmitting the light beam from scanner, projection unit that projects the first image formed in movable screen on windshield and displays a virtual image of the first image in a space in front of windshield, and driver that causes movable screen to reciprocate in a first direction separating from scanner and in a second direction approaching scanner. Movable screen reciprocates in a posture inclined to moving directions of movable screen.
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公开(公告)号：US09599816B2
公开(公告)日：2017-03-21
申请号：US15079683
申请日：2016-03-24
Inventor： Satoshi Kuzuhara
CPC classification number: G02B27/0101 , B60K35/00 , G02B5/10 , G02B27/01 , G02B27/0149 , G02B2027/011 , G02B2027/0123 , G02B2027/013 , G02B2027/014 , G02B2027/0141 , G02B2027/0181 , G03B21/28 , G03B21/62 , H04N5/64
Abstract: A display apparatus includes a display unit projecting an image to a light transmissive display member, and the display apparatus forms a virtual image of the image projected by the display unit on an opposite side to a user side. The display unit is configured to accommodate a display device displaying the image and a projection optical system that projects the image displayed on the display device to the display member in a housing. The projection optical system includes a first reflecting member disposed on a display device side and a second reflecting member disposed on an opening side in an optical path extending from the display device. A reflection surface of the first reflecting member reflecting the image displayed on the display device has a convex shape, and a reflection surface of the second reflecting member projecting the image to the display member has a concave shape.
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