Patents by Inventor Tokito YAMAGUCHI
Tokito YAMAGUCHI 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: 20240036320Abstract: An image display device according to a specific aspect includes: a first image element, a first optical member disposed on a light emission side of the image element, a second optical member including an incident surface disposed on the light emission side of the first optical member, a reflection surface configured to bend an optical axis, and a concaved emitting surface, and a barrel configured to accommodate the first optical member and hold the second optical member, wherein the emitting surface of the second optical member is exposed through an opening of the barrel, and an outer edge of the emitting surface is surrounded by an edge portion of the opening.Type: ApplicationFiled: July 28, 2023Publication date: February 1, 2024Applicant: SEIKO EPSON CORPORATIONInventor: Tokito YAMAGUCHI
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Publication number: 20240036319Abstract: An image display device includes: a display unit including a projection optical system and a combiner in an integrated state; and a frame configured to support the display unit, in which the display unit includes an upper portion that is in contact with a periphery of an opening of the frame and is fixed in a hung state, and the frame includes, at an upper side, a recessed portion at which a circuit member is disposed.Type: ApplicationFiled: July 28, 2023Publication date: February 1, 2024Applicant: SEIKO EPSON CORPORATIONInventors: Daiki MATSUMOTO, Tokito YAMAGUCHI
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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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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: 11573425Abstract: An optical module includes an image element, a projection lens, a prism mirror, a wedge type optical element, a barrel configured to support the prism mirror and the wedge type optical element, a first combiner configured to deflect image light emitted from the wedge type optical element, a first dust proof member configured to cover a both end region of the projection lens, the prism mirror, and the barrel in a third axis, and cover an end region of the projection lens and the prism mirror located on the prism mirror side in a second axis, and a second dust proof member provided between the projection lens and the barrel.Type: GrantFiled: February 24, 2022Date of Patent: February 7, 2023Assignee: SEIKO EPSON CORPORATIONInventor: Tokito Yamaguchi
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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: 20220276493Abstract: A projection lens that is a first optical member configured to emit image light from an emission portion, the image light being incident on an image element, a prism mirror that is a second optical member configured to cause the image light from the projection lens to be incident from an incident portion, a combiner configured to reflect the image light from the prism mirror toward a pupil position, and a light blocking member supported around at least one of the incident portion of the prism mirror and the emission portion of the projection lens are provided, wherein when viewed from a direction perpendicular to an optical axis of the image light incident on the incident portion of the prism mirror, at least a portion of the incident portion of the prism mirror protrudes from the light blocking member toward the emission portion of the projection lens.Type: ApplicationFiled: February 25, 2022Publication date: September 1, 2022Applicant: SEIKO EPSON CORPORATIONInventor: Tokito YAMAGUCHI
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Publication number: 20220276491Abstract: An optical module includes an image element, a projection lens, a prism mirror, a wedge type optical element, a barrel configured to support the prism mirror and the wedge type optical element, a first combiner configured to deflect image light emitted from the wedge type optical element, a first dust proof member configured to cover a both end region of the projection lens, the prism mirror, and the barrel in a third axis, and cover an end region of the projection lens and the prism mirror located on the prism mirror side in a second axis, and a second dust proof member provided between the projection lens and the barrel.Type: ApplicationFiled: February 24, 2022Publication date: September 1, 2022Applicant: SEIKO EPSON CORPORATIONInventor: Tokito YAMAGUCHI
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Publication number: 20220276492Abstract: An optical module includes: an image element; a prism mirror that reflects image light emitted from the image element at an inner reflection portion; a combiner that reflects the image light from the prism mirror toward a pupil position; and a barrel that is disposed between the prism mirror and the combiner and that positions the prism mirror. The barrel includes a first positioning surface brought into contact with the prism mirror in a second direction perpendicular to a first imaginary plane and parallel to a normal line of a second imaginary plane on which the image light emitted from an emission portion of the prism mirror is incident, and a second positioning portions brought into contact with the prism mirror in a third direction perpendicular to the first direction and intersecting the second direction.Type: ApplicationFiled: February 25, 2022Publication date: September 1, 2022Applicant: SEIKO EPSON CORPORATIONInventor: Tokito YAMAGUCHI
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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: 20220172667Abstract: 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: ApplicationFiled: November 29, 2021Publication date: June 2, 2022Applicant: SEIKO EPSON CORPORATIONInventors: Masayuki TAKAGI, Mitsutaka IDE, Tokito YAMAGUCHI
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Patent number: 11327301Abstract: A virtual image display device includes an image element configured to display an image, a first lens disposed in an extraction position of image light and including at the image element side thereof a convex surface, a second lens disposed further toward the image element side than the first lens and including a concave surface bonded to the convex surface of the first lens, a half mirror provided in a bonding portion for bonding together the convex surface and the concave surface, a transmission/reflection selection member provided at a light emitting side of the first lens and configured to selectively perform transmission or reflection of the light depending on a polarization state of the light, and a light-guiding portion keeping close contact between the image element and the second lens and configured to guide the image light.Type: GrantFiled: August 6, 2019Date of Patent: May 10, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Masayuki Takagi, Akira Komatsu, Takashi Takeda, Toshiaki Miyao, Tokito Yamaguchi
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Patent number: 11327309Abstract: A virtual image display apparatus includes a display device (image forming unit), a lens configured to refract imaging light from the display device, a first mirror member configured to reflect imaging light that passed through the lens, a second mirror member being a refractive reflective optical member configured to reflect the imaging light reflected by the first mirror member, and a third mirror member of a transmissive type configured to reflect the imaging light reflected by the second mirror member toward a position of an exit pupil. The refractive reflective optical member includes, across a refractive member, a refractive surface and a mirror surface. The lens and the refractive reflective optical member are integrated as a composite member.Type: GrantFiled: July 29, 2019Date of Patent: May 10, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Takashi Takeda, Masayuki Takagi, Toshiaki Miyao, Tokito Yamaguchi