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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).
(
E
2
E
1
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(
E
4
E
3
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×
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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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公开(公告)号：US20250138407A1
公开(公告)日：2025-05-01
申请号：US18987771
申请日：2024-12-19
Inventor： Takuya IMAOKA , Hiroaki OKAYAMA
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, the optical system comprising: a prism including a first transmission surface located on the magnification side, a second transmission surface located on the reduction side, and at least three reflection surfaces located on an optical path between the first and second transmission surfaces; wherein the at least three reflection surfaces include first and second reflection surfaces in order from the magnification side to the reduction side, and a most reduction-side reflection surface located closest to the reduction side, wherein an intermediate imaging position related with both the reduction and magnification conjugate points is positioned inside the prism, and wherein the first reflection surface is positioned in a region where a plurality of principal rays traveling inside the prism are converged on.
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Patent Agency Ranking
公开(公告)号：US20210103151A1
公开(公告)日：2021-04-08
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：US20170242248A1
公开(公告)日：2017-08-24
申请号：US15587805
申请日：2017-05-05
Inventor： Satoshi KUZUHARA , Hiroaki OKAYAMA
CPC classification number: G02B27/0101 , B60K35/00 , B60K2350/2052 , B60K2350/2056 , B60K2350/2082 , B60K2350/2086 , G02B27/01 , G02B2027/011 , G02B2027/0118 , G02B2027/013 , G06T19/006
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：US20250060262A1
公开(公告)日：2025-02-20
申请号：US18940093
申请日：2024-11-07
Inventor： Hiroaki OKAYAMA , Yusuke Nakaguchi , Tetsuya Suzuki , Ryo Okumura , Hideo Onishi , Takuya Imaoka
Abstract: An optical tactile sensor includes: an elastic member including a contact surface to be brought into contact with an object; a holding member including a window portion and contacting and holding the elastic member, the window portion being transparent; a light source; and a camera that photographs a shape of the contact surface through the window portion, wherein the elastic member includes: a first portion including the contact surface; and a second portion formed integrally with the first portion and disposed between the first portion and the window portion, the second portion being transparent, and the second portion has a hardness higher than a hardness of the first portion.
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公开(公告)号：US20230073556A1
公开(公告)日：2023-03-09
申请号：US17988156
申请日：2022-11-16
Inventor： Kazuhiro MINAMI , Hiroaki OKAYAMA
Abstract: A head-up display system displays a virtual image superimposed on a real view that can be visually recognized through a window part. The head-up display system includes a display part, an optical system, a light source part, an operation part, and a controller. The controller controls a display area of the display part in accordance with an operation of the operation part by the observer. The light flux emitted from the display part is reflected by the window part and reaches a visually recognizable area where the observer can visually recognize the virtual image. The light emitted from the light source part is reflected inside an area where the light flux is reflected by the window part and reaches the visually recognizable area. The virtual image and the light from the light source part are superimposed, and can be visually recognized.
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公开(公告)号：US20230019596A1
公开(公告)日：2023-01-19
申请号：US17950606
申请日：2022-09-22
Inventor： Yoshiteru MINO , Hideki TAKAHASHI , Masaki TADA , Toshiya MORI , Hiroaki OKAYAMA , Kazuhiro MINAMI
Abstract: Imaging and display system includes: a display; an optical system including a first mirror and a second mirror; a housing; a light-transmissive cover transparent to light and disposed to cover at least part of an opening of the housing; and a driver monitoring camera supported by a supporting body connected outside of the housing. First light emitted from the display passes through the light-transmissive cover via the optical system, and is reflected by a windshield toward a direction of the user. The driver monitoring camera captures an image of a driver shown on the light-transmissive cover by second light from a direction of the driver reflected by the windshield toward a direction of the light-transmissive cover.
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