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公开(公告)号：US11275241B2
公开(公告)日：2022-03-15
申请号：US17123627
申请日：2020-12-16
Inventor： Satoshi Kuzuhara , Hiroaki Okayama
Abstract: A head-up display displays an image as a virtual image to an observer and includes: a display device to display the image; and a projection optical system to enlarge and project the image. The projection optical system includes first and second optical elements arranged in this order in an optical path from the image. The first optical element has a diverging action stronger in a horizontal direction than in a vertical direction. The second optical element has a converging action stronger in the horizontal direction than in the vertical direction. A combined power of the first and second optical elements is larger in the vertical direction than in the horizontal direction. The virtual image is inclined by 45 degrees or more with respect a line of sight of the observer to have a lower end close to the observer and an upper end far from the observer.
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公开(公告)号：US10921604B2
公开(公告)日：2021-02-16
申请号：US16447365
申请日：2019-06-20
Inventor： Makoto Funabiki , Koji Taniguchi , Hiroaki Okayama , Masafumi Higashiyama , Yosuke Shibazaki
Abstract: A video display system includes a display unit, a projection unit, and a display control unit. The display unit displays an image. The projection unit projects a virtual image onto a target space with outgoing light of the display unit. The display control unit shifts a projection position of the virtual image by changing at least one of a projection distance or an angle of depression. The projection distance is a distance from a viewpoint to the virtual image. The angle of depression is an angle from which the virtual image is viewed from the user's viewpoint. The display control unit changes the projection distance of the virtual image in accordance with a distance instruction and changes at least one of the projection distance or the angle of depression such that the virtual image is projected onto a displayable region of the target space.
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公开(公告)号：US10795167B2
公开(公告)日：2020-10-06
申请号：US16447450
申请日：2019-06-20
Inventor： Makoto Funabiki , Koji Taniguchi , Hiroaki Okayama , Masafumi Higashiyama , Yosuke Shibazaki
Abstract: A video display system according to an embodiment includes a display unit, a projection unit, and a display control unit. The display unit displays an image thereon. The projection unit projects a virtual image, corresponding to the image, onto a target space with outgoing light of the display unit. The display control unit performs change processing of changing, in accordance with at least one of a projection distance or an angle of depression, specifics of sway correction for correcting sway of the virtual image with respect to the target space. The projection distance is a distance from a viewpoint of a user, who is viewing the virtual image projected onto the target space, to the virtual image. The angle of depression is an angle from which the virtual image is viewed from the user's viewpoint.
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公开(公告)号：US10222614B2
公开(公告)日：2019-03-05
申请号：US15587805
申请日：2017-05-05
Inventor： Satoshi Kuzuhara , Hiroaki Okayama
Abstract: A refractive optical system is disposed in an optical path from a display surface to a viewing area and between a projection optical system and the viewing area. A housing receives a display device, the projection optical system, and the refractive optical system, and is provided with an opening. An opening cover has at least partially a curved portion, and is disposed in the opening so that light emitted from the display surface is incident on a convex side of the curved portion. When a light beam that is emitted from a center of the display surface and reaches a center of the viewing area is referred to as a reference light beam, a head-up display satisfies the following condition (1): L2≤L1 (1) whereL1 is a distance from an end on the anterior side of the observer of the refractive optical system to the opening cover, andL2 is a distance from a position at which the reference light beam passes through the refractive optical system to the opening cover.
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公开(公告)号：US09928769B2
公开(公告)日：2018-03-27
申请号：US15275668
申请日：2016-09-26
Inventor： Satoshi Kuzuhara , Hiroaki Okayama
CPC classification number: G09G3/007 , G02B27/0101 , G02B2027/0116 , G02B2027/0118 , G02B2027/014 , G09G3/002 , G09G2320/02 , G09G2354/00 , G09G2380/10
Abstract: A head-up display includes a display device, a CPU, and a projection optical system. The display device has pixels including a first-color subordinate pixel and a second-color subordinate pixel, and displays an image. The CPU controls display of the display device. The projection optical system has a refractive optical system, and projects the image displayed on display device on a viewpoint region of an observer. The CPU asymmetrically shifts, between the reference outer side image end and the reference inner side image end with reference to a center, a pixel of an image formed by the second-color subordinate pixel relative to an image formed by the first-color subordinate pixel.
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Patent Agency Ranking
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：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：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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29.发明授权公开(公告)号：US11175501B2
公开(公告)日：2021-11-16
申请号：US16469188
申请日：2017-12-11
Inventor： Masahito Ogata , Toshiya Mori , Ken'ichi Kasazumi , Hiroaki Okayama
Abstract: A screen includes a surface inclined with respect to a reference plane. A driver moves the screen in a movement direction orthogonal to the reference plane. When forming a first virtual image serving as a virtual image on a first virtual plane whose inclination angle α with respect to an optical axis of a projector is smaller than a predetermined value, a controller is configured to hold the screen in the movement direction. When forming a second virtual image serving as the virtual image on a second virtual plane whose inclination angle ß with respect to the optical axis of the projector is larger than the predetermined value, the controller is configured to move the screen in the movement direction.
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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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