Patents by Inventor Masayuki Takagi
Masayuki Takagi 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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Publication number: 20240142707Abstract: A virtual image display device includes a display panel being a display element configured to emit image light, a light-guiding member including a first total reflection surface and a second total reflection surface, a first diffraction element being provided on a light incidence side in association with the light-guiding member, a second diffraction element being provided on a light emission side in association with the light-guiding member, and a stray light suppression filter being provided on an external side of an image extraction part provided with the second diffraction element and being configured to limit passage of diffracted light from the second diffraction element.Type: ApplicationFiled: October 25, 2023Publication date: May 2, 2024Applicant: SEIKO EPSON CORPORATIONInventors: Katsutoshi INOMOTO, Mitsutaka IDE, Masayuki TAKAGI, Takashi TAJIRI
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Patent number: 11940114Abstract: An optical device includes: a light guide plate having a group of optical-path deflectors configured to change the optical path of light from a first light source to form an image in the space within a first angle range, and change the optical path of light from a second light source to form an image in the space within a second angle range, wherein the first angle range and the second angle range are separated from each other or adjoining each other.Type: GrantFiled: January 23, 2019Date of Patent: March 26, 2024Assignee: OMRON CorporationInventors: Yoshihiko Takagi, Masayuki Shinohara, Yasuhiro Tanoue, Gouo Kurata, Norikazu Kitamura
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Publication number: 20240093411Abstract: A fiber with which a further enhanced electric field intensity is obtained when a compressive force is applied across the longitudinal axis of the fiber. The fiber is composed of a potential generating filament having at least one interior angle of less than 120° in a contour shape in a sectional view in a direction perpendicular to a longitudinal axis of the fiber.Type: ApplicationFiled: November 20, 2023Publication date: March 21, 2024Inventors: Tetsuya YAMANAGA, Kenichi MORI, Masayuki TSUJI, Masayoshi TAKAGI, Ryosuke EBINA
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Publication number: 20240004200Abstract: A virtual image display device includes a display element that is an image light generation device, a projection optical system on which image light from the display element is incident, and a partially transmissive mirror configured to partially reflect the image light from the projection optical system toward a pupil position, and a transmissive polarizer is disposed outside the partially transmissive mirror.Type: ApplicationFiled: June 28, 2023Publication date: January 4, 2024Applicant: SEIKO EPSON CORPORATIONInventor: Masayuki TAKAGI
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Publication number: 20230314813Abstract: A head-mounted display apparatus includes a control unit configured to correct a video, a display element configured to display the video corrected by the control unit, a first optical member on which video light corresponding to the video is incident, and a reflection member configured to reflect the video light from the first optical member to project a virtual image corresponding to the video. The first optical member and the reflection member correct distortion of the virtual image in a first direction. The control unit corrects the video based on distortion of the virtual image in a second direction crossing the first direction.Type: ApplicationFiled: March 30, 2023Publication date: October 5, 2023Applicant: SEIKO EPSON CORPORATIONInventors: Tokito YAMAGUCHI, Masayuki TAKAGI
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Patent number: 11769441Abstract: A display module includes a display element, a light-guiding optical device, and a control unit configured to perform distortion correction including correction of a chromatic aberration of magnification. The light-guiding optical device is constituted of an optical system having non-axisymmetry in an up-and-down direction with respect to the imaging light entering the light-guiding optical device, and includes a first optical member having positive refractivity, a second optical member having positive refractivity, and a first reflection surface configured to reflect the imaging light toward a pupil position. The refractivity of the first optical member is greater than the refractivity of the second optical member. An abbe number of a constituent material of the first optical member is greater than an abbe number of a constituent material of the second optical member. The control unit performs distortion correction by a different distortion correction amount for each color light.Type: GrantFiled: November 29, 2021Date of Patent: September 26, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Masayuki Takagi, Mitsutaka Ide, Tokito Yamaguchi
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Publication number: 20230260093Abstract: An optical module according to the present disclosure includes: a first display panel that emits a first image light, a first virtual image optical system that forms a first exit pupil of the first image light, and a control unit corrects a video image signal to a first correction video signal based on distortion generated in the first optical system, an aspect ratio of the video image signal being smaller than an aspect ratio of the first display panel, wherein the control unit causes the first display panel to emit the first image light from the first display panel based on the first correction video image signal.Type: ApplicationFiled: April 13, 2023Publication date: August 17, 2023Applicant: SEIKO EPSON CORPORATIONInventors: Masayuki TAKAGI, Nobuhiko YOKOO
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Patent number: 11657482Abstract: An optical module according to the present disclosure includes: a first display panel that emits a first image light, a first virtual image optical system that forms a first exit pupil of the first image light, and a control unit corrects a video image signal to a first correction video signal based on distortion generated in the first optical system, an aspect ratio of the video image signal being smaller than an aspect ratio of the first display panel, wherein the control unit causes the first display panel to emit the first image light from the first display panel based on the first correction video image signal.Type: GrantFiled: October 29, 2021Date of Patent: May 23, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Masayuki Takagi, Nobuhiko Yokoo
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Patent number: 11656469Abstract: A light-guiding device includes a pair of light-guiding portions, a pair of light-incident portions that causes image light to be incident on the pair of light-guiding portions respectively, and a pair of light-emitting portions that emit image light, guided by the pair of light-guiding portions, to outside respectively, in which a pair of optical members including the pair of light-guiding portions are coupled by a central member having light transmissivity, and separate overcoat layers are provided at the optical member on one side and at the optical member on another side with respect to an approximate center of the central member.Type: GrantFiled: September 14, 2021Date of Patent: May 23, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Toshiaki Miyao, Masayuki Takagi, Takashi Takeda, Tokito Yamaguchi
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Patent number: 11640060Abstract: A head-mounted display includes an image display device including a panel unit serving as a display element configured to display an image, a colored optical member disposed on a light path of imaging light emitted from the panel unit and having a yellowness of a predetermined value or greater, and a coloring correction optical member configured to correct a degree of coloring of the imaging light of the entire light path in accordance with the yellowness of the colored optical member.Type: GrantFiled: October 27, 2020Date of Patent: May 2, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Tokito Yamaguchi, Masayuki Takagi, Toshiaki Miyao, Akira Komatsu, Takashi Takeda
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Patent number: 11570394Abstract: An image display device is a self-luminous type device including a light emitting portion, and a casing portion of a display device unit has a heat dissipating structure portion through which a part of the image display device is exposed for heat dissipation. In manufacturing the display device unit, when performing simple and reliable assembly while securing a high heat dissipation characteristic, for example, by using characteristics of a silicon substrate, high accurate positioning is performed in a display device positioning portion.Type: GrantFiled: March 19, 2021Date of Patent: January 31, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Takahiro Totani, Masayuki Takagi, Yoshitaka Hama
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Patent number: 11550154Abstract: A display element, and a light-guiding member including a plurality of reflection surfaces and configured to guide image light from the display element by reflecting the image light at an inner surface, and cause the image light and external light to be visually recognized in an overlapping manner are provided, wherein at a boundary between a first reflection surface and a second reflection surface adjacent to each other included in the plurality of reflection surfaces of the light-guiding member with at least one of the first reflection surface and the second reflection surface including a curved surface, an end of the first reflection surface and an end of the second reflection surface match when projected from a specific direction.Type: GrantFiled: October 29, 2020Date of Patent: January 10, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Masayuki Takagi, Tokito Yamaguchi, Toshiaki Miyao, Takashi Takeda
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Patent number: 11536967Abstract: A light-guiding device is configured to accept image light through a light incidence part, guide the image light through reflection, and emit, to outside through a light emission part, the image light that is guided, the light-guiding device includes a protective member having a sheet shape and configured to cover a body member in a region corresponding to an optical surface of a surface of the light-guiding device, and an adhesive layer is formed between the body member and the protective member.Type: GrantFiled: October 28, 2020Date of Patent: December 27, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Toshiaki Miyao, Masayuki Takagi, Tokito Yamaguchi, Takashi Takeda
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Patent number: 11506895Abstract: A light-guiding device includes a pair of light-guiding portions, a pair of light-incident portions that causes image light to be incident on the respective pair of light-guiding portions, and a pair of light-emitting portion that causes image light guided by the respective pair of light-guiding portions to exit outside, in which a pair of optical members including the pair of light-guiding portions are coupled by a central member having light transmissivity, and in which the central member includes a light-guide blocking structure that suppresses light from being incident from one end to another end of the central member by absorbing the light.Type: GrantFiled: November 29, 2019Date of Patent: November 22, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Toshiaki Miyao, Masayuki Takagi, Takashi Takeda, Tokito Yamaguchi
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Patent number: 11480799Abstract: A head-mounted display includes a display device configured to display an image, a diopter adjustment device configured to adjust a diopter, and a correction processing circuit serving as an image correction device configured to correct a display image in accordance with a degree of diopter adjustment. In the adjustments made on a left side and a right side, respectively, after diopter adjustment, the display image is corrected in accordance with the degree of diopter adjustment.Type: GrantFiled: September 1, 2021Date of Patent: October 25, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Masayuki Takagi, Akira Komatsu, Takashi Takeda, Toshiaki Miyao, Tokito Yamaguchi
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Patent number: 11448882Abstract: A virtual image display apparatus includes a display device serving as an image forming unit, an image optical system including a first mirror member serving as an outer mirror member and receiving imaging light from the display device, and a partially reflecting type mirror portion reflecting imaging light emitted from the image optical system toward a position of an exit pupil. The first mirror member serving as the outer mirror member and the partially reflecting type mirror portion are integrated.Type: GrantFiled: August 29, 2019Date of Patent: September 20, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Takashi Takeda, Masayuki Takagi, Toshiaki Miyao, Tokito Yamaguchi
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Patent number: 11435588Abstract: A virtual image display apparatus includes a display element, a projection lens configured to converge image light emitted from the display element, a prism configured to cause the image light by an internal reflecting surface thereof and moreover emit the image light from an emission surface thereof while refracting the image light, and a see-through mirror configured to reflect the image light emitted from the prism toward a pupil position. The projection lens, the prism, and the see-through mirror are arranged to form an off-axis system. AT an off-axis surface of the off-axis system, an intermediate pupil is arranged between the projection lens and the internal reflecting surface, with the intermediate pupil being arranged to be farther to the incident surface side of the prism than to the projection lens and the internal reflecting surface, and an intermediate image is formed between the prism and the see-through mirror.Type: GrantFiled: August 27, 2020Date of Patent: September 6, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Takashi Takeda, Masayuki Takagi, Toshiaki Miyao, Tokito Yamaguchi
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Publication number: 20220276476Abstract: An optical unit and an image display device include a display element configured to emit imaging light, a first mirror having partial transparency and configured to reflect a portion of the imaging light emitted from the display element, and a second mirror configured to return the imaging light reflected by the first mirror to the first mirror to form an exit pupil. The imaging light is incident on the first mirror from the display element at a first incident angle, and the imaging light is incident on the first mirror at a second incident angle that is smaller than the first incident angle from the second mirror, and the first mirror includes an angle dependent separation film that shows different separation characteristics for the imaging light according to the difference between the first incident angle and the second incident angle.Type: ApplicationFiled: February 24, 2022Publication date: September 1, 2022Applicant: SEIKO EPSON CORPORATIONInventors: Takashi TAKEDA, Masayuki TAKAGI, Kunihiko YANO
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Patent number: 11397326Abstract: A panel unit configured to, for imaging light, use different opening ratios depending on a wavelength band for displaying an image, a yellowing optical member that is disposed on an optical path of imaging light emitted from the panel unit, and turns yellow with age, a yellowing degree estimation unit configured to estimate, by prediction, a yellowing degree of the yellowing optical member with age, and a luminance adjustment unit configured to, depending on yellowing of the yellowing optical member, based on data of the yellowing degree estimation unit, adjust luminance of an image in the panel unit, are provided.Type: GrantFiled: November 27, 2020Date of Patent: July 26, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Tokito Yamaguchi, Masayuki Takagi, Toshiaki Miyao, Akira Komatsu, Takashi Takeda
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Publication number: 20220171201Abstract: A virtual image display device includes a first display device for a right eye, a second display device for a left eye, a lens barrel or the like serving as an assembly member configured to assemble the first display device and the second display device, and first and second correction units serving as post-assembly adjustment devices configured to adjust a display state of the first display device and the second display device assembled by the assembly member.Type: ApplicationFiled: November 29, 2021Publication date: June 2, 2022Applicant: SEIKO EPSON CORPORATIONInventor: Masayuki Takagi