Patents by Inventor Daisuke Ichii
Daisuke Ichii has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11822076Abstract: Disclosed is an image display device for displaying an image on a screen. The image display device includes an image forming element configured to optically scan a screen, and an optical member disposed between the screen and the image forming element, and being configured to reflect light, where the optical member is disposed such that the reflected light, along normals with respect to every reflecting point on the optical member, is directed away from the screen.Type: GrantFiled: March 14, 2019Date of Patent: November 21, 2023Assignee: RICOH COMPANY, LTD.Inventors: Makoto Hirakawa, Daisuke Ichii
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Patent number: 11016294Abstract: An optical scanner, a display system, and a mobile object. The optical scanner includes a light source to emit irradiation light, a light deflector to scan the irradiation light emitted from the light source in a first scanning direction and in a second scanning direction intersecting with the first scanning direction, circuitry to turn on the light source for a predetermined length of time, and a photodetector to detect the irradiation light for the predetermined length of time. The predetermined length of time includes a timing at which the light deflector turns a scanning direction in the first scanning direction or the second scanning direction. The display system includes the optical scanner, a divergent part through which the irradiation light scanned by the light deflector is projected and diverges, and an imaging optical system to reflect projection light projected through the divergent part.Type: GrantFiled: December 16, 2019Date of Patent: May 25, 2021Assignee: Ricoh Company, Ltd.Inventor: Daisuke Ichii
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Patent number: 11002887Abstract: An image display apparatus includes: a light source to emit light; a lens array including a plurality of lenses arranged therein; and an image forming device to form an image with the emitted light on the lens array. The light corresponding to the formed image is transmitted from the lens array to be reflected by a reflective surface to visualize the formed image into a virtual image. At least two of the plurality of lenses of the lens array have curvatures different from each other.Type: GrantFiled: January 23, 2015Date of Patent: May 11, 2021Assignee: RICOH COMPANY, LTD.Inventors: Makoto Inamoto, Daisuke Ichii
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Publication number: 20210116707Abstract: Disclosed is an image display device for displaying an image on a screen. The image display device includes an image forming element configured to optically scan a screen, and an optical member disposed between the screen and the image forming element, and being configured to reflect light, where the optical member is disposed such that the reflected light, along normals with respect to every reflecting point on the optical member, is directed away from the screen.Type: ApplicationFiled: March 14, 2019Publication date: April 22, 2021Inventors: Makoto HIRAKAWA, Daisuke ICHII
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Patent number: 10962767Abstract: An optical scanning device includes a plurality of light sources, a light deflector, a light receiver, and circuitry. The light deflector scans light emitted from the plurality of light sources on a surface to be scanned. The light receiver receives light emitted from at least one of the light sources, at a predetermined timing. The circuitry adjusts a scanning position of the light deflector based on a timing at which the light receiver receives the light. The circuitry turns on at least one of the plurality of light sources that emits light having a wavelength of 600 [nm] or and causes the light receiver to receive the light at the predetermined timing.Type: GrantFiled: February 7, 2019Date of Patent: March 30, 2021Assignee: RICOH COMPANY, LTD.Inventor: Daisuke Ichii
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Patent number: 10948716Abstract: An image display device includes a display unit configured to display a display image and to use a color information target value as a color information value of a display color, the display color being a color of the displayed image; and a first image correction unit configured, in a case where the color information value of the display color of the display image obtained by capturing the display image displayed by the display unit is different from the color information target value, to correct the color information value of the display color of the displayed image displayed by the display unit, so that the color information value of the display color of the display image obtained by capturing the display image displayed by the display unit becomes the color information target value.Type: GrantFiled: August 3, 2018Date of Patent: March 16, 2021Assignee: RICOH COMPANY, LTD.Inventors: Miho Higuchi, Takuro Yasuda, Daisuke Ichii
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Patent number: 10783606Abstract: An image display apparatus includes an image forming unit and a vehicle provided with the image display apparatus. The image forming unit includes a light source unit configured to emit light, an optical scanner configured to scan the light emitted from the light source unit two-dimensionally in a main scanning direction and a sub-scanning direction, and an intermediate image forming unit configured to form an intermediate image by the light scanned by the optical scanner. The image forming unit satisfies 0.3<Rm/L<3, where Rm denotes a radius of curvature of the intermediate image forming unit in the main scanning direction, and L denotes distance between a reference point when the optical scanner deflects and scans the light and a center of the intermediate image formed on the intermediate image forming unit. In the vehicle, the image display apparatus indicates the intermediate image to a driver as a virtual image.Type: GrantFiled: November 8, 2016Date of Patent: September 22, 2020Assignee: Ricoh Company, Ltd.Inventors: Hiromichi Atsuumi, Yuki Hayashi, Daisuke Ichii, Naoki Nakamura
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Publication number: 20200241294Abstract: An optical scanner, a display system, and a mobile object. The optical scanner includes a light source to emit irradiation light, a light deflector to scan the irradiation light emitted from the light source in a first scanning direction and in a second scanning direction intersecting with the first scanning direction, circuitry to turn on the light source for a predetermined length of time, and a photodetector to detect the irradiation light for the predetermined length of time. The predetermined length of time includes a timing at which the light deflector turns a scanning direction in the first scanning direction or the second scanning direction. The display system includes the optical scanner, a divergent part through which the irradiation light scanned by the light deflector is projected and diverges, and an imaging optical system to reflect projection light projected through the divergent part.Type: ApplicationFiled: December 16, 2019Publication date: July 30, 2020Applicant: Ricoh Company, Ltd.Inventor: Daisuke Ichii
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Patent number: 10663721Abstract: An image display apparatus (1000) mounted on an object or attached to a human body, includes: an image forming unit (200) to form an image with light; an optical system including a curved mirror (9) that reflects the light forming the image toward a bent transmission and reflection member; and a rotator (310) to rotate the curved mirror (9) about a prescribed axis. A first projection image, which is a projection image on an XY plane of the image, forms an angle ?1 with respect to an X direction. A second projection image, which is a projection image on an XY plane of the prescribed axis, forms an angle ?2 with respect to the X direction. The X denotes a lateral direction of the object or the human body and the Y direction denotes a vertical direction of the object or the human body.Type: GrantFiled: April 28, 2016Date of Patent: May 26, 2020Assignee: Ricoh Company, Ltd.Inventor: Daisuke Ichii
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Patent number: 10613321Abstract: An image display apparatus includes a light source device including a light source unit; a scanning optical system including an image forming unit on which an intermediate image is formed by light from the light source unit; and a virtual image optical system configured to guide light of the intermediate image by using a reflecting mirror and a curved transmissive reflection member. The scanning optical system includes an optical scanning unit configured to scan the light from the light source unit in a main scanning direction and a sub-scanning direction of the image forming unit. The image forming unit is a transmissive member curved with a convex surface toward the reflecting mirror.Type: GrantFiled: November 30, 2018Date of Patent: April 7, 2020Assignee: Ricoh Company, Ltd.Inventors: Naoki Nakamura, Daisuke Ichii, Hiromichi Atsuumi, Naoki Miyatake, Yuki Hayashi
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Patent number: 10573213Abstract: An image display apparatus and a vehicle provided with the image display apparatus. The image display apparatus includes a light source to emit a laser beam, an optical deflector to deflect the laser beam two-dimensionally, and an intermediate image generator to perform two-dimensional scanning twice in a main scanning direction and a sub-scanning direction with the laser beam deflected by the optical deflector to generate an intermediate image of one frame, where the laser beam deflected by the optical deflector draws two scanning lines. In the image display apparatus, the two scanning lines have two different phases for the two-dimensional scanning for a first time and the two-dimensional scanning for a second time, respectively.Type: GrantFiled: March 14, 2019Date of Patent: February 25, 2020Assignee: Ricoh Company, Ltd.Inventors: Hiromichi Atsuumi, Daisuke Ichii, Toshihiro Yamashiro, Makoto Inamoto
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Patent number: 10572972Abstract: An image display apparatus includes an image forming unit and a vehicle provided with the image display apparatus. The image forming unit includes a light source unit configured to emit light, an optical scanner configured to scan the light emitted from the light source unit two-dimensionally in a main scanning direction and a sub-scanning direction, and an intermediate image forming unit configured to form an intermediate image by the light scanned by the optical scanner. The image forming unit satisfies 0.3<Rm/L<3, where Rm denotes a radius of curvature of the intermediate image forming unit in the main scanning direction, and L denotes distance between a reference point when the optical scanner deflects and scans the light and a center of the intermediate image formed on the intermediate image forming unit. In the vehicle, the image display apparatus indicates the intermediate image to a driver as a virtual image.Type: GrantFiled: January 23, 2019Date of Patent: February 25, 2020Assignee: Ricoh Company, Ltd.Inventors: Hiromichi Atsuumi, Yuki Hayashi, Daisuke Ichii, Naoki Nakamura
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Patent number: 10437052Abstract: An image display device includes a light source to emit light, an image forming element to form an image with the light emitted from the light source, a micro-lens array to be irradiated with the light forming the image, the micro-lens array including a plurality of lens columns arranged in a second direction, each lens column including micro-lenses being arranged in a first direction, the first direction and the second direction being perpendicular with each other, and a projection optical system to project light passing through the micro-lens array toward a transmitting and reflecting member.Type: GrantFiled: April 26, 2016Date of Patent: October 8, 2019Assignee: RICOH COMPANY, LTD.Inventors: Kento Nakamura, Daisuke Ichii, Makoto Inamoto, Hiroyuki Tanabe
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Publication number: 20190285875Abstract: An optical scanning device includes a plurality of light sources, a light deflector, a light receiver, and circuitry. The light deflector scans light emitted from the plurality of light sources on a surface to be scanned. The light receiver receives light emitted from at least one of the light sources, at a predetermined timing. The circuitry adjusts a scanning position of the light deflector based on a timing at which the light receiver receives the light. The circuitry turns on at least one of the plurality of light sources that emits light having a wavelength of 600 [nm] or and causes the light receiver to receive the light at the predetermined timing.Type: ApplicationFiled: February 7, 2019Publication date: September 19, 2019Applicant: Ricoh Company, Ltd.Inventor: Daisuke ICHII
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Publication number: 20190213938Abstract: An image display apparatus and a vehicle provided with the image display apparatus. The image display apparatus includes a light source unit to emit a laser beam, an optical deflector to deflect the laser beam two-dimensionally, and an intermediate image generator to perform two-dimensional scanning twice in a main scanning direction and a sub-scanning direction with the laser beam deflected by the optical deflector to generate an intermediate image of one frame, where the laser beam deflected by the optical deflector draws two scanning lines. In the image display apparatus, the two scanning lines have two different phases for the two-dimensional scanning for a first time and the two-dimensional scanning for a second time, respectively. In the image display apparatus, the two scanning lines have two different starting points for the two-dimensional scanning for a first time and the two-dimensional scanning for a second time, respectively.Type: ApplicationFiled: March 14, 2019Publication date: July 11, 2019Inventors: Hiromichi ATSUUMI, Daisuke Ichii, Toshihiro Yamashiro, Makoto Inamoto
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Publication number: 20190204591Abstract: An image display apparatus includes a light source device including a light source unit; a scanning optical system including an image forming unit on which an intermediate image is formed by light from the light source unit; and a virtual image optical system configured to guide light of the intermediate image by using a reflecting mirror and a curved transmissive reflection member. The scanning optical system includes an optical scanning unit configured to scan the light from the light source unit in a main scanning direction and a sub-scanning direction of the image forming unit. The image forming unit is a transmissive member curved with a convex surface toward the reflecting mirror.Type: ApplicationFiled: November 30, 2018Publication date: July 4, 2019Inventors: Naoki NAKAMURA, Daisuke ICHII, Hiromichi ATSUUMI, Naoki MIYATAKE, Yuki HAYASHI
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Publication number: 20190156454Abstract: An image display apparatus includes an image forming unit and a vehicle provided with the image display apparatus. The image forming unit includes a light source unit configured to emit light, an optical scanner configured to scan the light emitted from the light source unit two-dimensionally in a main scanning direction and a sub-scanning direction, and an intermediate image forming unit configured to form an intermediate image by the light scanned by the optical scanner. The image forming unit satisfies 0.3<Rm/L<3, where Rm denotes a radius of curvature of the intermediate image forming unit in the main scanning direction, and L denotes distance between a reference point when the optical scanner deflects and scans the light and a center of the intermediate image formed on the intermediate image forming unit. In the vehicle, the image display apparatus indicates the intermediate image to a driver as a virtual image.Type: ApplicationFiled: January 23, 2019Publication date: May 23, 2019Inventors: Hiromichi ATSUUMI, Yuki Hayashi, Daisuke Ichii, Naoki Nakamura
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Patent number: 10290248Abstract: An image display apparatus and a vehicle provided with the image display apparatus. The image display apparatus includes a light source unit to emit a laser beam, an optical deflector to deflect the laser beam two-dimensionally, and an intermediate image generator to perform two-dimensional scanning twice in a main scanning direction and a sub-scanning direction with the laser beam deflected by the optical deflector to generate an intermediate image of one frame, where the laser beam deflected by the optical deflector draws, two scanning lines. In the image display apparatus, the two scanning lines have two different phases for the two-dimensional scanning for a first time and the two-dimensional scanning for a second time, respectively. in the image display apparatus, the two scanning lines have two different starting points for the two-dimensional scanning for a first time and the two-dimensional scanning for a second time, respectively.Type: GrantFiled: April 24, 2018Date of Patent: May 14, 2019Assignee: Ricoh Company, Ltd.Inventors: Hiromichi Atsuumi, Daisuke Ichii, Toshihiro Yamashiro, Makoto Inamoto
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Patent number: 10191274Abstract: An image display apparatus includes a light source device including a light source unit; a scanning optical system including an image forming unit on which an intermediate image is formed by light from the light source unit; and a virtual image optical system configured to guide light of the intermediate image by using a reflecting mirror and a curved transmissive reflection member. The scanning optical system includes an optical scanning unit configured to scan the light from the light source unit in a main scanning direction and a sub-scanning direction of the image forming unit. The image forming unit is a transmissive member curved with a convex surface toward the reflecting mirror.Type: GrantFiled: April 25, 2017Date of Patent: January 29, 2019Assignee: RICOH COMPANY, LTD.Inventors: Naoki Nakamura, Daisuke Ichii, Hiromichi Atsuumi, Naoki Miyatake, Yuki Hayashi
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Publication number: 20180373027Abstract: An image display device includes a display unit configured to display a display image and to use a color information target value as a color information value of a display color, the display color being a color of the displayed image; and a first image correction unit configured, in a case where the color information value of the display color of the display image obtained by capturing the display image displayed by the display unit is different from the color information target value, to correct the color information value of the display color of the displayed image displayed by the display unit, so that the color information value of the display color of the display image obtained by capturing the display image displayed by the display unit becomes the color information target value.Type: ApplicationFiled: August 3, 2018Publication date: December 27, 2018Inventors: Miho HIGUCHI, Takuro YASUDA, Daisuke ICHII