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公开(公告)号：US10473929B2
公开(公告)日：2019-11-12
申请号：US15908972
申请日：2018-03-01
Inventor： Satoshi Kuzuhara , Hiroaki Okayama , Toshiya Mori
Abstract: A head-up display includes a display device and a projection optical system. The projection optical system has a lens group including at least one lens element and projects onto a reflecting member an image displayed on the display device. The lens group includes a drive lens that shifts along an optical path to change its distance from the display device.
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公开(公告)号：US10281722B2
公开(公告)日：2019-05-07
申请号：US15728543
申请日：2017-10-10
Inventor： Satoshi Kuzuhara , Masafumi Sueyoshi , Hiroaki Okayama , Katsuhiko Hayashi
Abstract: A head-up display projects an image on a windshield to allow a viewer to visually observe a virtual image. The head-up display includes a display device, a relay optical system, and a projection optical system. The display device displays an image. The relay optical system provides the image displayed by the display device as an intermediate image. The projection optical system reflects the intermediate image provided by the relay optical system to project the intermediate image on the windshield.
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公开(公告)号：US11852809B2
公开(公告)日：2023-12-26
申请号：US18095313
申请日：2023-01-10
Inventor： Satoshi Kuzuhara , Hiroaki Okayama
CPC classification number: G02B27/0101 , B60R11/0229 , B60R2011/0026 , B60R2300/205 , 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 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：US20220326520A1
公开(公告)日：2022-10-13
申请号：US17846888
申请日：2022-06-22
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：US10670780B2
公开(公告)日：2020-06-02
申请号：US16068956
申请日：2017-01-10
Inventor： Ken′ichi Kasazumi , Toshiya Mori , Kosuke Kubota , Masahito Ogata , Hiroaki Okayama , Satoshi Kuzuhara
Abstract: The present invention provides a Fresnel lens that can reduce generation of concentric stray light. The Fresnel lens includes a sawtooth corrugated face that is formed by alternately disposing a first face inclined relative to optical axis A and a second face substantially parallel to optical axis A, and a light shielding mask is formed at a position corresponding to the second face.
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Patent Agency Ranking
公开(公告)号：US10234683B2
公开(公告)日：2019-03-19
申请号：US15072779
申请日：2016-03-17
Inventor： Hiroaki Okayama , Satoshi Kuzuhara
Abstract: A head-up display is mounted to a vehicle having a windshield, and includes a display element configured to display an image, a first optical system configured to reflect the image displayed by the display element and project the image onto the windshield; and a second optical system configured to reflect the image displayed by the display element and project the image onto the windshield. The image projected with the first optical system is projected onto the windshield at a position below a position of the image projected with the second optical system.
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公开(公告)号：US10025097B2
公开(公告)日：2018-07-17
申请号：US15704454
申请日：2017-09-14
Inventor： Satoshi Kuzuhara , Hiroaki Okayama
Abstract: Head-up display, which is mounted on a vehicle, performs projection on a transparent reflective member, and allows an observer to visually recognize a virtual image, includes display device that displays an image, and a projection optical system that has refractive optical system and projects displayed image displayed by display device on eye box of the observer. As an angle formed between a vector of a light beam that is incident on refractive optical system and a vector of an output light beam, the angle is greater at a light beam on an image end passing through a vehicle inner side of refractive optical system than at a light beam on an image end passing through a vehicle outer side of refractive optical system.
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公开(公告)号：US20250020917A1
公开(公告)日：2025-01-16
申请号：US18899205
申请日：2024-09-27
Inventor： Hiroyuki SHOBAYASHI , Satoshi Kuzuhara , Kazuhiro Minami , Hiroaki Okayama , Akira Hashiya
Abstract: An optical system includes an incidence part changing a traveling direction of the incident image light from a display part and an expansion part that divides and duplicates the image light traveling from the incidence part. The expansion part includes a first and a second expansion part. The first expansion part includes a first and a second diffraction structure part each having a diffraction structure that divides and duplicates the image light along a first direction, and a non-diffraction structure part disposed between the first and the second diffraction structure part. The second expansion part includes a third diffraction structure part that divides and duplicates image light along the first direction. The third diffraction structure part is disposed to overlap with the non-diffraction structure part of the first expansion part in a vertical direction with respect to the pupil expansion part.
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公开(公告)号：US11604360B2
公开(公告)日：2023-03-14
申请号：US17126507
申请日：2020-12-18
Inventor： Hiroaki Okayama , Satoshi Kuzuhara , Yusuke Nihei , Koji Taniguchi , Makoto Funabiki
IPC: G02B27/01
Abstract: The head-up display includes an imaging position changer configured to change a position of a virtual image between a far visual position far from an observer and a near visual position close to the observer. The imaging position changer inclines the virtual image at the far visual position by a second inclination angle with respect to a perpendicular plane to a reference light beam reaching a center of a viewpoint region in which a viewpoint of the observer is located, to move an upper end thereof in a forward direction of the moving object, and inclines the virtual image at the near visual position by a first inclination angle smaller than the second inclination angle with respect to the perpendicular plane to the reference light beam, to move the upper end in the forward direction of the moving object.
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公开(公告)号：US11579445B2
公开(公告)日：2023-02-14
申请号：US16892397
申请日：2020-06-04
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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