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).

  • VIRTUAL IMAGE DISPLAY APPARATUS
    Publication number: 20180288375
    Abstract: In a projection system, a nonaxisymmetric aspheric surface is used as a surface that is located in a position where in a pencil of light of video image light that exits from each of two points in different corner regions in an image plane that is a light exiting plane of an image display apparatus, light components that should reach a viewer's eyes do not intersect one another, whereby the size of an optical system can be further reduced and the size of an overall apparatus can therefore be reduced with a variety of types of optical precision, such as the resolution and angle of view, maintained.
    Type: Application
    Filed: April 27, 2018
    Publication date: October 4, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Masayuki TAKAGI, Takahiro TOTANI, Takashi TAKEDA, Akira KOMATSU, Toshiaki MIYAO
  • IMAGE DISPLAY DEVICE
    Publication number: 20180288359
    Abstract: An image display device includes: an image display section that displays an image for a user and allows the user to visually recognize external light; a line-of-sight direction and distance detecting section that detects a line-of-sight direction of the user and a distance to an object located in the line-of-sight direction; and a display control section that controls display operation of the image display section. The image display section includes a focal point and convergence changing section that changes a convergence and a focal point of a display image to be projected. The display control section controls the focal point and convergence changing section based on the line-of-sight direction and the distance to the object detected by the line-of-sight direction and distance detecting section.
    Type: Application
    Filed: March 19, 2018
    Publication date: October 4, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Akira KOMATSU, Takashi TAKEDA, Toshiaki MIYAO, Masayuki TAKAGI
  • PRODUCTION METHOD FOR BONDED OPTICAL MEMBER, PRODUCTION METHOD FOR VIRTUAL IMAGE DISPLAY DEVICE, LIGHT GUIDING DEVICE, AND VIRTUAL IMAGE DISPLAY DEVICE
    Publication number: 20180267311
    Abstract: By forming a hard coat layer on a bonding surface which is a surface of a bonding region between a first base material and a second base material, smoothing is achieved, and as a smoothing assisting treatment before forming the hard coat layer, the surfaces of the base materials are flattened by polishing on the bonding surface or a region corresponding to the bonding surface. By the synergistic effect of smoothing by formation of the hard coat layer and a flattening treatment by polishing as the smoothing assisting treatment, sufficient smoothing is achieved.
    Type: Application
    Filed: March 1, 2018
    Publication date: September 20, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Toshiaki MIYAO, Masayuki TAKAGI, Takashi TAKEDA, Akira KOMATSU
  • VIRTUAL IMAGE DISPLAY APPARATUS
    Publication number: 20180267322
    Abstract: A virtual image display apparatus includes a case member that stores a image element and is provided with a first end connected to other members, an optical component holding member with which an optical component guiding image light from the image element is assembled and that is provided with a second end connected to the first end, three or more protruding portions that are provided at one of the first end and the second end, have protrusion shapes, and extend toward the other end, three or more grooves that are provided at the other end, have depression shapes corresponding to the three or more protruding portions, and extend, and adhesive portions that fix the three or more protruding portions to the three or more grooves in a state in which the case member is aligned with the optical component holding member.
    Type: Application
    Filed: May 23, 2018
    Publication date: September 20, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Masayuki TAKAGI, Toshiaki MIYAO, Takashi TAKEDA, Akira KOMATSU, Takuya IKEDA
  • Light guide device and virtual-image display device
    Patent number: 10078222
    Abstract: A light guide device includes an incident section, a parallel light guide body for light guide, and an emitting section. The emitting section includes a reflection unit formed by arraying a plurality of mirrors. The plurality of mirrors configuring the reflection unit are reflection elements having reflectance of P polarized light lower than reflectance of S polarized light. The plurality of mirrors configuring the reflection unit can be accompanied by wavelength plates to be adjacent to the mirrors.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: September 18, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akira Komatsu, Takahiro Totani, Takashi Takeda, Masayuki Takagi, Toshiaki Miyao, Hayato Matsuki
  • Virtual image display apparatus
    Patent number: 10073273
    Abstract: In a frame part, a center portion having a thick structure is provided between a first optical member as a first light guide unit and a second optical member as a second light guide unit to connect to both and fixes relative positions of the first optical member and the second optical member by the center portion, and thereby, reduction in weight and size of the frame part is realized.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: September 11, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Toshiaki Miyao, Takahiro Totani, Masayuki Takagi, Takashi Takeda, Akira Komatsu, Kazuya Kamakura
  • HEAD MOUNTED DISPLAY AND IMAGE FORMATION OPTICAL SYSTEM
    Publication number: 20180249150
    Abstract: In a head mounted display, an image is displayed with central resolution higher than peripheral resolution or the peripheral resolution is not necessarily high resolution, and a controller changes the display aspect of the image formed by an image formation apparatus in accordance with a change in the sightline detected with a sightline sensor.
    Type: Application
    Filed: February 20, 2018
    Publication date: August 30, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takashi TAKEDA, Akira KOMATSU, Masayuki TAKAGI, Toshiaki MIYAO
  • IMAGE DISPLAY APPARATUS
    Publication number: 20180246327
    Abstract: An image display apparatus includes image displaying sections that present displayed images to a user and allow the user to visually recognize outside light, a first light adjusting member that is disposed on an outside-facing side of the image displaying sections and adjusts the transmittance based on outside light incident on the first light adjusting member, and a second light adjusting member that is disposed between the image displaying sections and the first light adjusting member and adjusts the transmittance in accordance with the transmittance of the first light adjusting member.
    Type: Application
    Filed: February 20, 2018
    Publication date: August 30, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Masayuki TAKAGI, Takashi TAKEDA, Akira KOMATSU, Toshiaki MIYAO
  • VIRTUAL IMAGE DISPLAY DEVICE
    Publication number: 20180231787
    Abstract: A virtual image display device has a light guide device in which the half mirror layer (the semi-transmissive reflecting film) of the light guide member is formed on the partial area of the first junction surface, and the second junction surface of the light transmitting member is bonded to the first junction surface in at least the exceptional area. Therefore, it is possible to increase the bonding strength of the first junction surface and the second junction surface, namely the strength of the light guide device composed of the light guide member and the light transmitting member combined with each other even in the case in which the attachment force of the half mirror layer (the semi-transmissive reflecting film) with respect to the first junction surface is not sufficiently strong.
    Type: Application
    Filed: April 18, 2018
    Publication date: August 16, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Masayuki TAKAGI, Takahiro TOTANI, Toshiaki MIYAO, Akira KOMATSU, Takashi TAKEDA
  • Virtual image display apparatus
    Patent number: 10001652
    Abstract: A virtual image display apparatus includes a case member that stores a image element and is provided with a first end connected to other members, an optical component holding member with which an optical component guiding image light from the image element is assembled and that is provided with a second end connected to the first end, three or more protruding portions that are provided at one of the first end and the second end, have protrusion shapes, and extend toward the other end, three or more grooves that are provided at the other end, have depression shapes corresponding to the three or more protruding portions, and extend, and adhesive portions that fix the three or more protruding portions to the three or more grooves in a state in which the case member is aligned with the optical component holding member.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: June 19, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Masayuki Takagi, Toshiaki Miyao, Takashi Takeda, Akira Komatsu, Takuya Ikeda
  • Virtual image display apparatus
    Patent number: 9977238
    Abstract: An intermediate image is formed inside a first prism, and an image light, which is reflected on the order of a third surface, a first surface and a second surface, is transmitted through the first surface and reaches the eyes of the observer, therefore it is possible to make the entire optical system small and light in weight by making the first prism thin, and realize a high performance display device with a wide angle of view. Further, when an external light is passed through, for example, the first surface and the third surface and observed, a diopter scale is set to approximately zero, and thereby reducing the defocus or distortion of the external light when observed in a see-through manner. And, it is possible such that the shape of the first prism conforms to the face of the observer, the center is also close to the face.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: May 22, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akira Komatsu, Takahiro Totani, Takashi Takeda, Toshiaki Miyao, Masayuki Takagi
  • Virtual image display apparatus
    Patent number: 9979936
    Abstract: In a projection system, a nonaxisymmetric aspheric surface is used as a surface that is located in a position where in a pencil of light of video image light that exits from each of two points in different corner regions in an image plane that is a light exiting plane of an image display apparatus, light components that should reach a viewer's eyes do not intersect one another, whereby the size of an optical system can be further reduced and the size of an overall apparatus can therefore be reduced with a variety of types of optical precision, such as the resolution and angle of view, maintained.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: May 22, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Masayuki Takagi, Takahiro Totani, Takashi Takeda, Akira Komatsu, Toshiaki Miyao
  • Virtual image display device
    Patent number: 9971158
    Abstract: A virtual image display device has a light guide device in which the half mirror layer (the semi-transmissive reflecting film) of the light guide member is formed on the partial area of the first junction surface, and the second junction surface of the light transmitting member is bonded to the first junction surface in at least the exceptional area. Therefore, it is possible to increase the bonding strength of the first junction surface and the second junction surface, namely the strength of the light guide device composed of the light guide member and the light transmitting member combined with each other even in the case in which the attachment force of the half mirror layer (the semi-transmissive reflecting film) with respect to the first junction surface is not sufficiently strong.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: May 15, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Masayuki Takagi, Takahiro Totani, Toshiaki Miyao, Akira Komatsu, Takashi Takeda
  • Light guide device, virtual image display apparatus, and method for manufacturing light guide device
    Patent number: 9958683
    Abstract: In a light guide device, a step between optical surfaces connected to each other by a connection portion can be limited (e.g., to 1 mm or smaller) so that a large stepped portion is not allowed to be formed at the connection portion in a hard coat formation process, whereby a coating liquid that flows along portions that are to form the optical surfaces forms no liquid pool or causes no liquid sagging. The light guide device can thus maintain satisfactory light guiding performance at the light guide portion.
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: May 1, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Masayuki Takagi, Toshiaki Miyao, Takahiro Totani, Takashi Takeda, Akira Komatsu
  • Virtual image display apparatus with curved surface having both positive and negative curvature and functioning as both reflection surface and refraction surface
    Patent number: 9945997
    Abstract: An intermediate image is formed inside a light guide member by a projection lens or the like, whereby a small optical system having a wide viewing angle and high performance is provided. At least one curved surface among curved surfaces forming an optical system is an opposite-sign curvature curved surface having an opposite-sign curvature point different in curvature depending on direction, whereby the optical system is placed in a satisfactory aberration correction state.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: April 17, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akira Komatsu, Takahiro Totani, Masayuki Takagi, Toshiaki Miyao, Takashi Takeda
  • VIRTUAL IMAGE DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF
    Publication number: 20180095283
    Abstract: 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: Application
    Filed: September 20, 2017
    Publication date: April 5, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takashi TAKEDA, Akira KOMATSU, Masayuki TAKAGI, Toshiaki MIYAO
  • VIRTUAL IMAGE DISPLAY APPARATUS
    Publication number: 20180067320
    Abstract: A light guide member includes three surfaces of a second surface, a fourth surface, and a fifth surface as two or more non-axisymmetric curved surfaces, and a projection lens includes a lens surface as a non-axisymmetric aspheric surface. With this, on the light guide member side, even when there is a shape constraint that the first surface or the third surface which is a surface contributing to light guide is a flat surface, and correction of asymmetric aberration is limited, it becomes possible to perform sufficient aberration correction as the whole of an optical system including the projection lens. Therefore, the virtual image display apparatus can have a wide viewing angle and high performance, and can be made small and lightweight.
    Type: Application
    Filed: October 30, 2017
    Publication date: March 8, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Akira KOMATSU, Takahiro TOTANI, Masayuki TAKAGI, Takashi TAKEDA, Toshiaki MIYAO
  • Light guide device and virtual image display apparatus
    Patent number: 9904057
    Abstract: A light guide device may be incorporated into a virtual image display apparatus, and functionally includes a light-incident part for entrance of picture lights, a light guide part that guides the picture lights via the light-incident part, and a light-exiting part that outputs the picture lights from the light guide part to a position of an eye. In the light guide device, light guide that enables non-diffraction virtual image formation is performed with respect to lateral first directions and a pupil size is enlarged by first and second diffraction optical elements with respect to longitudinal second directions.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: February 27, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takashi Takeda, Takahiro Totani, Masayuki Takagi, Toshiaki Miyao, Akira Komatsu
  • VIRTUAL IMAGE DISPLAY APPARATUS
    Publication number: 20180024368
    Abstract: A virtual image display apparatus includes a case member that stores a image element and is provided with a first end connected to other members, an optical component holding member with which an optical component guiding image light from the image element is assembled and that is provided with a second end connected to the first end, three or more protruding portions that are provided at one of the first end and the second end, have protrusion shapes, and extend toward the other end, three or more grooves that are provided at the other end, have depression shapes corresponding to the three or more protruding portions, and extend, and adhesive portions that fix the three or more protruding portions to the three or more grooves in a state in which the case member is aligned with the optical component holding member.
    Type: Application
    Filed: February 9, 2017
    Publication date: January 25, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Masayuki TAKAGI, Toshiaki MIYAO, Takashi TAKEDA, Akira KOMATSU, Takuya IKEDA
  • Virtual image display apparatus
    Patent number: 9829709
    Abstract: A light guide member (10) includes three surfaces of a second surface (S12), a fourth surface (S14), and a fifth surface (S15) as two or more non-axisymmetric curved surfaces, and a projection lens (30) includes a lens surface (31a) as a non-axisymmetric aspheric surface. With this, on the light guide member side, even when there is a shape constraint that the first surface (S11) or the third surface (S13) which is a surface contributing to light guide is a flat surface, and correction of asymmetric aberration is limited, it becomes possible to perform sufficient aberration correction as the whole of an optical system including the projection lens. Therefore, the virtual image display apparatus can have a wide viewing angle and high performance, and can be made small and lightweight.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: November 28, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akira Komatsu, Takahiro Totani, Masayuki Takagi, Takashi Takeda, Toshiaki Miyao