Patents by Inventor Toshiaki Miyao
Toshiaki Miyao 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: 11231585Abstract: 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 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 lens is asymmetric with respect to an optical axis in a first direction corresponding to an eccentric direction defined by the first mirror member and the second mirror member, and is symmetric, across the optical axis, with respect to a second direction orthogonal to the first direction.Type: GrantFiled: July 29, 2019Date of Patent: January 25, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Takashi Takeda, Masayuki Takagi, Toshiaki Miyao, Tokito Yamaguchi
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Patent number: 11215833Abstract: Provided are an imaging element configured to display an image, a projection optical system configured to project an image from the imaging element, and a two-stage structural diaphragm including a first diaphragm forming a first aperture portion in the projection optical system, and a second diaphragm forming a second aperture portion in the projection optical system, in which inclinations of a principal ray, relative to an image plane of an imaging element, of imaging light emitted from a peripheral portion of the image plane differ between in a first direction and in a second direction perpendicular to the first direction among in-plane directions of the image plane, in which the first diaphragm and the second diaphragm in the two-stage structural diaphragm are provided at different positions corresponding to differences between the inclinations of the principal ray in the first direction and in the second direction.Type: GrantFiled: January 15, 2020Date of Patent: January 4, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Masayuki Takagi, Toshiaki Miyao, Takashi Takeda, Tokito Yamaguchi
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Publication number: 20210405377Abstract: 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: ApplicationFiled: September 14, 2021Publication date: December 30, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Toshiaki MIYAO, Masayuki TAKAGI, Takashi TAKEDA, Tokito YAMAGUCHI
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Publication number: 20210397006Abstract: 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: ApplicationFiled: September 1, 2021Publication date: December 23, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Masayuki TAKAGI, Akira KOMATSU, Takashi TAKEDA, Toshiaki MIYAO, Tokito YAMAGUCHI
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Patent number: 11204500Abstract: A half mirror 21 provided in an optical path bends the optical path, and a semi-transmissive polarizing plate 23 increases the transmittance of image light GL in a direction along alignment of the eyes of an observer while the virtual image display device has a wide angle of view and is downsized, thus reducing luminance unevenness between the central region and the peripheral region in the image in the direction and allowing the observer to view a high quality image.Type: GrantFiled: September 13, 2018Date of Patent: December 21, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Masayuki Takagi, Akira Komatsu, Takashi Takeda, Toshiaki Miyao, Tokito Yamaguchi
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Patent number: 11199712Abstract: A virtual image display device includes a display light guiding unit, and an image forming unit that emits image light to the display light guiding unit, the display light guiding unit includes a first light guiding unit that guides image light corresponding to a first angle of view, and a second light guiding unit that guides image light corresponding to a second angle of view, among angles of view of image light emitted from the image forming unit, and the first light guiding unit and the second light guiding unit respectively include incident side diffraction elements that take the image light beams into the inside, and emission side diffraction elements that emit the image light beams to the outside.Type: GrantFiled: October 23, 2019Date of Patent: December 14, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Takashi Takeda, Akira Komatsu, Masayuki Takagi, Toshiaki Miyao
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Patent number: 11163162Abstract: A see-through display apparatus includes an image display apparatus configured to emit a video light, a light guide apparatus configured to guide the video light and to output the video light in a first direction, and a light control shade disposed opposite to the first direction with respect to the light guide apparatus. The light control shade is configured to control a transmittance of an outside light based on a luminance of the outside light. A first response time of the light control shade when the outside light changes from a lower luminance to a higher luminance is slower than a second response time of the light control shade when the outside light changes from the higher luminance to the lower luminance.Type: GrantFiled: November 4, 2019Date of Patent: November 2, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Masayuki Takagi, Takahiro Totani, Takashi Takeda, Akira Komatsu, Toshiaki Miyao
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Patent number: 11150477Abstract: 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: November 29, 2019Date of Patent: October 19, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Toshiaki Miyao, Masayuki Takagi, Takashi Takeda, Tokito Yamaguchi
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Patent number: 11143877Abstract: A head-mounted image display device includes a device main body configured to display an image to allow a user to view the image, and a supporting member configured to support the device main body, and to be mounted on the head of the user. The supporting member includes an upper extension portion and a lower extension portion, each extending in a left-and-right direction, and a light guide member configured to guide the image to an eye of the user is interposed between the upper extension portion and the lower extension portion in an up-and-down direction of the user.Type: GrantFiled: August 17, 2018Date of Patent: October 12, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Tomohide Kamiya, Toshiaki Miyao, Takeshi Fujishiro
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Patent number: 11137609Abstract: 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 29, 2020Date of Patent: October 5, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Masayuki Takagi, Akira Komatsu, Takashi Takeda, Toshiaki Miyao, Tokito Yamaguchi
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Patent number: 11099395Abstract: A virtual image display device includes a video image element that displays an image, and a light-guiding member that guides video image light from the video image element by reflection and transmission at a plurality of light-guiding surfaces. Among the plurality of light-guiding surfaces, with respect to an incident-side light-guiding surface and an emission-side light-guiding surface that are adjacent to each other, and an opposing light-guiding surface that faces the incident-side light-guiding surface and the emission-side light-guiding surface, a thickness from the incident-side light-guiding surface to the opposing light-guiding surface is caused to be smaller than a thickness from the emission-side light-guiding surface to the opposing light-guiding surface.Type: GrantFiled: January 15, 2020Date of Patent: August 24, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Tokito Yamaguchi, Masayuki Takagi, Toshiaki Miyao, Takashi Takeda
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Publication number: 20210165227Abstract: 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: ApplicationFiled: November 27, 2020Publication date: June 3, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Tokito YAMAGUCHI, Masayuki TAKAGI, Toshiaki MIYAO, Akira KOMATSU, Takashi TAKEDA
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Patent number: 11025894Abstract: In a left and right pair of a first display device and a second display device that perform repositionable display, mutually different display contents can be visually recognized as a first video image and a second video image. Further, a display control portion controls the display content in accordance with at least one of the first video image and the second video image.Type: GrantFiled: December 27, 2019Date of Patent: June 1, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Takashi Takeda, Toshiyuki Kasai, Masayuki Takagi, Toshiaki Miyao, Tokito Yamaguchi
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Publication number: 20210132392Abstract: 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: ApplicationFiled: October 29, 2020Publication date: May 6, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Masayuki TAKAGI, Tokito YAMAGUCHI, Toshiaki MIYAO, Takashi TAKEDA
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Publication number: 20210132388Abstract: 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: ApplicationFiled: October 27, 2020Publication date: May 6, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Tokito YAMAGUCHI, Masayuki TAKAGI, Toshiaki MIYAO, Akira KOMATSU, Takashi TAKEDA
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Publication number: 20210132389Abstract: 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: ApplicationFiled: October 28, 2020Publication date: May 6, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Toshiaki MIYAO, Masayuki TAKAGI, Tokito YAMAGUCHI, Takashi TAKEDA
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Publication number: 20210096377Abstract: 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: ApplicationFiled: September 29, 2020Publication date: April 1, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Masayuki TAKAGI, Akira KOMATSU, Takashi TAKEDA, Toshiaki MIYAO, Tokito YAMAGUCHI
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Patent number: 10942431Abstract: Provided is a virtual image display apparatus including a laser light source, a scanner configured to scan light from the laser light source and render an intermediate image, a diffusion element arranged at a position of the intermediate image formed by the scanner, and an exit pupil forming unit configured to cause light that has passed through the diffusion element to be incident on a position of an exit pupil. The diffusion element separates the light from the scanner into first emission light used as a reference, and second emission light having a separation angle greater than a capturing angle corresponding to an inclination of light toward a predetermined pupil radius relative to the first emission light at an emission position of the light from the diffusion element, and then emits the first emission light and the second emission light.Type: GrantFiled: April 5, 2019Date of Patent: March 9, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Akira Komatsu, Masayuki Takagi, Toshiaki Miyao, Takashi Takeda, Tokito Yamaguchi
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Publication number: 20210063752Abstract: A virtual image display apparatus includes a display element, an optical element configured to pass therethrough image light emitted from the display element, a reflecting mirror configured to reflect the image light emitted from the optical element, a see-through hologram mirror of a see-through type configured to reflect the image light, emitted from the reflecting mirror, to a pupil position, and a linear diffraction element of a transmissive type arranged on an optical path from the optical element to the hologram mirror. The optical element, the reflecting mirror, and the see-through hologram mirror are arranged to form an off-axis system, and the linear diffraction element compensates wavelength dispersion caused by the see-through hologram mirror at an off-axis surface of the off-axis system.Type: ApplicationFiled: August 27, 2020Publication date: March 4, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Takashi TAKEDA, Masayuki TAKAGI, Toshiaki MIYAO, Tokito YAMAGUCHI, Mitsutaka IDE
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Publication number: 20210063749Abstract: 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 sidfe 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: ApplicationFiled: August 27, 2020Publication date: March 4, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Takashi TAKEDA, Masayuki TAKAGI, Toshiaki MIYAO, Tokito YAMAGUCHI