Patents by Inventor Mitsutaka Ide
Mitsutaka Ide 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: 20210239986Abstract: A display module includes an image light generation device configured to generate image light, a first diffraction element including a first surface and a second surface and configured to diffract the image light, a first reflection section configured to reflect the image light, and a second diffraction element including a third surface and configured to diffract the image light. The first diffraction element is configured to transmit the image light incident on the first surface and emit the image light toward the first reflection section, the first reflection section is configured to reflect the image light toward the second surface, the first diffraction element is configured to diffract the image light incident on the second surface and emit the image light toward the second diffraction element, and the second diffraction element is configured to diffract the image light, emit the image light, and form an exit pupil.Type: ApplicationFiled: January 29, 2021Publication date: August 5, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Masatoshi YONEKUBO, Mitsutaka IDE
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Publication number: 20210239990Abstract: A display module includes an image light generation device configured to generate image light, a first reflection section configured to reflect the image light from the image light generation device, a first diffraction element configured to diffract the image light entering a first incident surface, a second reflection section configured to reflect the image light from the first diffraction element, and a second diffraction element configured to diffract the image light entering a second incident surface, thereby forming an exit pupil. When viewed from a normal line direction of a virtual plane including a normal line of the first incident surface and a normal line of the second incident surface, an optical axis of the image light from the image light generation device toward the first reflection section and an optical axis of the image light from the first diffraction element toward the second reflection section intersect each other.Type: ApplicationFiled: January 29, 2021Publication date: August 5, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Masatoshi YONEKUBO, Takashi TAKEDA, Mitsutaka IDE
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Publication number: 20210239989Abstract: An image light generation module includes a first display element configured to emit first image light, a second display element configured to emit second image light, a third display element configured to emit third image light, a combining prism configured to emit combined image light combined from the first image light, the second image light, and the third image light, and a first gap defining member that defines a first gap between the first display element and the combining prism, a second gap defining member that defines a second gap between the second display element and the combining prism, and a third gap defining member that defines a third gap between the third display element and the combining prism, in which at least one of the first gap, the second gap, and the third gap is different in size from another of the gaps.Type: ApplicationFiled: January 29, 2021Publication date: August 5, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Mitsutaka IDE, Masatoshi YONEKUBO
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Publication number: 20210231958Abstract: A display device according to the present disclosure includes a first optical unit having positive power, a second optical unit including a first diffraction element and having positive power, a third optical unit having positive power, and a fourth optical unit including a second diffraction element and having positive power, and the first to fourth optical units are provided along an optical path of imaging light emitted from an imaging light generating device. The second optical unit further includes a first member provided at one surface side of the first diffraction element, and a second member provided on a side of the first member opposite to a side where the first diffraction element is located, the first member is transmissive and has an elastic modulus of 50 GPa or greater, and the second member is transmissive and has optical power.Type: ApplicationFiled: April 9, 2021Publication date: July 29, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Mitsutaka IDE, Masatoshi YONEKUBO
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Patent number: 11073696Abstract: In an optical system of a display device, a second reflection element, a first diffraction element, a first reflection element, and a second diffraction element are disposed along a traveling direction of image light emitted from an image light projecting device. A reflection surface of the first reflection element is a concave surface being a free-curved surface and being recessed in a central portion with respect to a peripheral portion, and an intermediate image is formed between the first reflection element and the second diffraction element. A reflection surface of the second reflection element is a concave surface being a free-curved surface and being recessed in a central portion with respect to a peripheral portion, and an intermediate image is formed between the second reflection element and the first diffraction element. Therefore, an intermediate lens for forming an intermediate image is not provided.Type: GrantFiled: September 26, 2018Date of Patent: July 27, 2021Assignee: SEIKO EPSON CORPORATIONInventor: Mitsutaka Ide
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Patent number: 11067810Abstract: A head-mounted display apparatus according to an aspect of the present disclosure includes an imaging light generating device, a first deflection element including a first deflection section configured to deflect imaging light in a first direction and a second deflection section configured to deflect the imaging light in a second direction, a first diffraction element, and a second diffraction element. When a plane surrounded by the principal ray passing plane, the first principal ray, the second principal ray, and the first deflection section is taken as a first plane, and a plane surrounded by the second deflection section, the first principal ray, the second principal ray, and the first diffraction element is taken as a second plane, the first plane overlaps with at least a part of the second plane when viewed from the third direction and does not overlap with the second plane when viewed from the fourth direction.Type: GrantFiled: October 29, 2019Date of Patent: July 20, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Masatoshi Yonekubo, Mitsutaka Ide
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Publication number: 20210165216Abstract: In a correction optical member for an HMD, a first optical member and a second optical member are arranged side by side. The first optical member includes a first diffraction grating disposed on a first surface and a second diffraction grating disposed on a second surface that is opposite to the first surface so as to face away from the first diffraction grating. The second optical member includes a third diffraction grating disposed on a third surface that is arranged in an extending direction of the first surface, and a fourth diffraction grating disposed on a fourth surface that is arranged in an extending direction of the second surface.Type: ApplicationFiled: November 26, 2020Publication date: June 3, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Masayuki TAKAGI, Masatoshi YONEKUBO, Mitsutaka IDE
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Publication number: 20210165226Abstract: An image display device includes an image light generation device configured to generate image light, and a deflection member configured to deflect the image light to form an exit pupil, in which the image light generation device includes a first light source unit configured to emit first light, a second light source unit configured to emit second light within a same frequency band as the first light and having a wavelength band different from a wavelength band of the first light, and a combining optical member configured to at least partially superimpose the first light and the second light, the deflection member includes a first diffraction member corresponding to the wavelength band of the first light and a second diffraction member corresponding to the wavelength band of the second light, and the first diffraction member and the second diffraction member overlap when viewed from the exit pupil.Type: ApplicationFiled: November 25, 2020Publication date: June 3, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Mitsutaka IDE, Masatoshi YONEKUBO
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Publication number: 20210149209Abstract: In an optical system, a first optical section having positive power, a second optical section provided with a first diffractive element and having positive power, a third optical section having positive power, and a fourth optical section provided with a second diffractive element and having positive power are disposed along a light path of image light emitted from an image light generation device. A first intermediate image of the image light is formed between the first optical section and the third optical section, a pupil is formed in the vicinity of the third optical section, a second intermediate image of the image light is formed between the third optical section and the fourth optical section, and the fourth optical section collimates the image light to form an exit pupil. The first diffractive element and the second diffractive element are in a conjugate relation or a roughly conjugate relation.Type: ApplicationFiled: January 28, 2021Publication date: May 20, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Mitsutaka IDE, Masatoshi YONEKUBO
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Patent number: 11002972Abstract: A display device according to the present disclosure includes a first optical unit having positive power, a second optical unit including a first diffraction element and having positive power, a third optical unit having positive power, and a fourth optical unit including a second diffraction element and having positive power, and the first to fourth optical units are provided along an optical path of imaging light emitted from an imaging light generating device. The second optical unit further includes a first member provided at one surface side of the first diffraction element, and a second member provided on a side of the first member opposite to a side where the first diffraction element is located, the first member is transmissive and has an elastic modulus of 50 GPa or greater, and the second member is transmissive and has optical power.Type: GrantFiled: March 24, 2020Date of Patent: May 11, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Mitsutaka Ide, Masatoshi Yonekubo
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Publication number: 20210063750Abstract: A head-mounted display according to the present disclosure includes an imaging light generating device that emits imaging light, and a half mirror that reflects the imaging light and transmits external light. The imaging light is incident on the half mirror as light of a predetermined polarization state, and, with respect to the light of the predetermined polarization state, reflectance of a first polarization by the half mirror is lower than reflectance of a second polarization by the half mirror.Type: ApplicationFiled: August 27, 2020Publication date: March 4, 2021Applicant: SEIKO EPSON CORPORATIONInventor: Mitsutaka IDE
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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: 20210063753Abstract: An image display device of the present disclosure includes an image light generating device, a first, a second, a third, and a fourth optical unit. A first intermediate image is formed between the first and the third optical unit. A pupil is formed between the second and the fourth optical unit. A second intermediate image is formed between the third and the fourth optical unit. An exit pupil is formed at an opposite side of the fourth optical unit from the third optical unit. The image light generating device includes a first, a second, a third light emitting panel, and a color synthesis element. The color synthesis element is constituted of a cross dichroic prism including a first and a second dichroic film that intersect with each other. Each of the first and the second dichroic film does not have a polarization separation characteristic.Type: ApplicationFiled: November 13, 2020Publication date: March 4, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Akio FUKASE, Mitsutaka IDE, Toshiyuki NOGUCHI
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Patent number: 10935807Abstract: In an optical system, a first optical section having positive power, a second optical section provided with a first diffractive element and having positive power, a third optical section having positive power, and a fourth optical section provided with a second diffractive element and having positive power are disposed along a light path of image light emitted from an image light generation device. A first intermediate image of the image light is formed between the first optical section and the third optical section, a pupil is formed in the vicinity of the third optical section, a second intermediate image of the image light is formed between the third optical section and the fourth optical section, and the fourth optical section collimates the image light to form an exit pupil. The first diffractive element and the second diffractive element are in a conjugate relation or a roughly conjugate relation.Type: GrantFiled: January 25, 2019Date of Patent: March 2, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Mitsutaka Ide, Masatoshi Yonekubo
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Patent number: 10871656Abstract: A beam diameter expanding device includes a first optical element and a second optical element. The first optical element expands a beam diameter of a light beam entering through a first incident face by expanding in a first direction, and emits the expanded light beam from a first emission face. The second optical element expands a beam diameter of the light beam that entered through a second incident face in a state expanded in beam diameter in the first direction by the first optical element, by expanding in a second direction, and emits the expanded light beam from a second emission face. A width of the first incident face in the second direction (the direction of beam diameter expansion by the second optical element) is narrower than a width of the second incident face in the first direction (the direction of beam diameter expansion by the first optical element).Type: GrantFiled: September 6, 2017Date of Patent: December 22, 2020Assignee: SEIKO EPSON CORPORATIONInventor: Mitsutaka Ide
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Patent number: 10866424Abstract: An image display device of the present disclosure includes an image light generating device, a first, a second, a third, and a fourth optical unit. A first intermediate image is formed between the first and the third optical unit. A pupil is formed between the second and the fourth optical unit. A second intermediate image is formed between the third and the fourth optical unit. An exit pupil is formed at an opposite side of the fourth optical unit from the third optical unit. The image light generating device includes a first, a second, a third light emitting panel, and a color synthesis element. The color synthesis element is constituted of a cross dichroic prism including a first and a second dichroic film that intersect with each other. Each of the first and the second dichroic film does not have a polarization separation characteristic.Type: GrantFiled: November 7, 2019Date of Patent: December 15, 2020Assignee: SEIKO EPSON CORPORATIONInventors: Akio Fukase, Mitsutaka Ide, Toshiyuki Noguchi
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Patent number: 10852555Abstract: A head-mounted display apparatus according to the present disclosure includes an image generating module, a first deflecting element including a first deflecting portion configured to deflect, along a second optical axis intersecting the first optical axis, imaging light from the image generating module, and a second deflecting portion configured to deflect the imaging light along a third optical axis, a first diffraction element configured to diffract the imaging light from the second deflecting portion, and a second diffraction element configured to diffract the imaging light from the first diffraction element. A distance along the first optical axis between the image generating module and the first deflecting portion is longer than a distance along the third optical axis between the first diffraction element and the second deflecting portion.Type: GrantFiled: October 29, 2019Date of Patent: December 1, 2020Assignee: SEIKO EPSON CORPORATIONInventors: Takashi Takeda, Takeshi Koshihara, Masatoshi Yonekubo, Mitsutaka Ide
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Publication number: 20200358035Abstract: A display device of the present disclosure includes a substrate, a lens layer including a lens, a light-transmitting layer that contacts a lens surface of the lens, and has translucency, a pixel electrode disposed between the substrate and the lens layer, and a color filter disposed between the pixel electrode and the lens layer. The lens is disposed so as to correspond to the pixel electrode. A refractive index of a constituent material for the lens is lower than a refractive index of a constituent material for the light-transmitting layer.Type: ApplicationFiled: May 8, 2020Publication date: November 12, 2020Applicant: SEIKO EPSON CORPORATIONInventors: Osamu YOKOYAMA, Takeshi KOSHIHARA, Mitsutaka IDE
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Publication number: 20200333610Abstract: The image display device includes an image generating unit that emits first image light, a pupil expanding element that expands a diameter of a light flux included in the first image light from the image generating unit to obtain second image light, a first light condensing optical system that condenses the second image light and forms an intermediate image, and a second light condensing optical system that condenses light from the intermediate image and generates a virtual image on eye of a viewer, in a plane including at least the image generating unit, the pupil expanding element, and the eye of the viewer, a maximum emission angle of the first image light is smaller than a maximum viewing angle of the virtual image, and the diameter of the light flux included in the second image light is greater than that of a light flux included in the virtual image.Type: ApplicationFiled: July 1, 2020Publication date: October 22, 2020Applicant: SEIKO EPSON CORPORATIONInventors: Masatoshi YONEKUBO, Osamu YOKOYAMA, Takashi TAKEDA, Mitsutaka IDE, Daisuke ISHIDA
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Publication number: 20200310129Abstract: A display device according to the present invention includes, along an optical path of image light emitted from an image light generating device, a first optical unit having positive power, a second optical unit having positive power and including a first diffraction element of a reflective type, a third optical unit having positive power, and a fourth optical unit having positive power and including a second diffraction element of a reflective type. The second optical unit includes a first light-transmitting member having optical power and provided at a first surface of the first diffraction element, and a light shielding member provided at a second surface of the first diffraction element.Type: ApplicationFiled: March 24, 2020Publication date: October 1, 2020Applicant: SEIKO EPSON CORPORATIONInventors: Mitsutaka IDE, Toshiyuki NOGUCHI