Patents by Inventor Takashi Takeda

Takashi Takeda 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).

  • Publication number: 20200073127
    Abstract: 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: Application
    Filed: August 29, 2019
    Publication date: March 5, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takashi TAKEDA, Masayuki TAKAGI, Toshiaki MIYAO, Tokito YAMAGUCHI
  • Publication number: 20200064638
    Abstract: 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: Application
    Filed: November 4, 2019
    Publication date: February 27, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Masayuki TAKAGI, Takahiro TOTANI, Takashi TAKEDA, Akira KOMATSU, Toshiaki MIYAO
  • Patent number: 10571698
    Abstract: A light guide device used in a display apparatus includes a transparent light guide portion that guides light beams incident from one end side to a light-emitting portion. The light guide portion includes a plurality of partial reflection surfaces between a first surface and a second surface which are parallel to each other, the plurality of partial reflection surfaces being inclined at the same angle from a normal direction with respect to the second surface toward the one end side. In the plurality of partial reflection surfaces, an appropriate incident angle range of the partial reflection surface positioned on the one end side is set to a larger angle than that of the partial reflection surface positioned on another end side.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: February 25, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Hayato Matsuki, Takashi Takeda
  • Publication number: 20200049999
    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: October 23, 2019
    Publication date: February 13, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takashi TAKEDA, Akira KOMATSU, Masayuki TAKAGI, Toshiaki MIYAO
  • Publication number: 20200041785
    Abstract: 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: Application
    Filed: August 6, 2019
    Publication date: February 6, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Masayuki TAKAGI, Akira KOMATSU, Takashi TAKEDA, Toshiaki MIYAO, Tokito YAMAGUCHI
  • Publication number: 20200041795
    Abstract: A virtual image display device includes an image element configured to display an image, a first optical unit disposed at a position where image light is extracted, a second optical unit disposed at the image element side with respect to the first optical unit, a half mirror provided on a serrated surface formed at a bonding portion between the first optical unit and the second optical unit, and a transmission/reflection selection member that is provided at a light emitting side of the first optical unit and that is configured to selectively transmit or reflect light depending on a polarization state of the light.
    Type: Application
    Filed: August 5, 2019
    Publication date: February 6, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tokito YAMAGUCHI, Masayuki TAKAGI, Toshiaki MIYAO, Akira KOMATSU, Takashi TAKEDA
  • Publication number: 20200033607
    Abstract: 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: Application
    Filed: July 29, 2019
    Publication date: January 30, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takashi TAKEDA, Masayuki TAKAGI, Toshiaki MIYAO, Tokito YAMAGUCHI
  • Publication number: 20200033606
    Abstract: 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: Application
    Filed: July 29, 2019
    Publication date: January 30, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takashi TAKEDA, Masayuki TAKAGI, Toshiaki MIYAO, Tokito YAMAGUCHI
  • Publication number: 20200033573
    Abstract: A virtual image display apparatus includes a display device (image forming unit), a first mirror member configured to reflect imaging light from the display device, a second mirror member configured to reflect imaging light reflected by the first mirror member, and a third mirror member of a transmissive type configured to reflect imaging light reflected by the second mirror member toward a position of an exit pupil. One of the first mirror member and the second mirror member is a refractive reflective optical member that includes a refractive member including a refractive surface, and a mirror surface formed at a non-refractive surface of the refractive member.
    Type: Application
    Filed: July 29, 2019
    Publication date: January 30, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takashi TAKEDA, Masayuki TAKAGI, Toshiaki MIYAO, Tokito YAMAGUCHI
  • Patent number: 10539801
    Abstract: A display device of the invention includes: an image generation part configured to generate image light; a light guide being configured to guide the image light; and an emitting part configured to cause the image light to emit from the light guide toward an exit pupil, in which the emitting part includes a plurality of half mirrors which are disposed parallel to one another at an interval, each of the plurality of half mirrors being configured to reflect a part of the image light and cause another part of the image light to pass through the half mirror, and in at least one half mirror of the plurality of half mirrors, when Bmax represents a maximum luminance, Bmin represents a minimum luminance, and a luminance ratio R (%) is defined as R=[(Bmax?Bmin)/Bmax]×100, R?30 is satisfied.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: January 21, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Hayato Matsuki, Takashi Takeda, Shohei Yoshida
  • Publication number: 20200018966
    Abstract: A head-mounted display includes a display device, a projection optical member, a prism member, and a light condensing and reflecting surface. The prism member includes a first prism, and a second prism that is disposed further toward an exit pupil side than the first prism. The first prism includes an incident surface, a reflection surface that totally reflects the image light, and a first joining surface that is joined with the second prism via a semi-transmissive reflection surface. The second prism includes a second joining surface that is joined with the first joining surface, and an opposing flat surface that is disposed parallel to the reflection surface to face the reflection surface and configured to transmit the image light, reflected by the semi-transmissive reflection surface and then by the light condensing and reflecting surface and thereafter passing through the semi-transmissive reflection surface.
    Type: Application
    Filed: July 9, 2019
    Publication date: January 16, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Akira KOMATSU, Masayuki TAKAGI, Toshiaki MIYAO, Takashi TAKEDA, Tokito YAMAGUCHI
  • Publication number: 20200018967
    Abstract: A head-mounted display includes a display device, a projection optical member, and a prism member. The prism member includes a first prism receiving image light from the projection optical member, and a second prism disposed at a position further toward an exit pupil than the first prism. The first prism includes an entrance surface, a first reflection surface, and a first joining surface, the second prism includes a second joining surface joined to the first joining surface via a semi-transmissive reflection surface, a second reflection surface, and a light collecting reflection surface, and the semi-transmissive reflection surface is configured to reflect the image light, reflected by the light collecting reflection surface and then totally reflected by the second reflection surface, to pass through the second reflection surface.
    Type: Application
    Filed: July 9, 2019
    Publication date: January 16, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Akira KOMATSU, Masayuki TAKAGI, Toshiaki MIYAO, Takashi TAKEDA, Tokito YAMAGUCHI
  • Patent number: 10520733
    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: Grant
    Filed: September 20, 2017
    Date of Patent: December 31, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takashi Takeda, Akira Komatsu, Masayuki Takagi, Toshiaki Miyao
  • Patent number: 10521624
    Abstract: An information processing system, method for use with the system, information providing system, and method for use with the system, an information processing apparatus, method for use with the apparatus, a doll, an object, a program storage medium, and a program for authenticating users reliably are provided. A user acquires beforehand a doll called Pochara the Good Friend incorporating an IC chip that stores a user ID for authenticating the user. When the user mounts the doll on a platform connected to a personal computer, the user ID is read from the IC chip by a reader housed in the platform and transmitted over the Internet to a Pochara service server. The server has a Pochara database holding personal information about users of the service. The transmitted user ID is checked against the personal information in the database for authentication. This invention applies advantageously to servers offering services through networks.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: December 31, 2019
    Assignee: SONY CORPORATION
    Inventors: Akiko Asami, Takashi Suzuki, Takashi Takeda
  • Patent number: 10509230
    Abstract: By configuring a micro structure portion, an image display device, and an eyepiece optical system to satisfy Expression (1), a diffusion effect of an appropriate extent can be imparted to image light with a relatively simple configuration, by taking into account the size of each of pixels constituting the image display device that is an image element, gaps between the pixels are made less noticeable, and a favorable state of visibility of an image can be obtained.
    Type: Grant
    Filed: September 27, 2018
    Date of Patent: December 17, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akira Komatsu, Takashi Takeda, Toshiaki Miyao, Masayuki Takagi, Tokito Yamaguchi
  • Patent number: 10509229
    Abstract: A light guide system (light guide device) includes a transparent light guide portion that guides light beams incident from one end side to a light-emitting portion. The light guide portion includes a first surface, a second surface which is parallel to the first surface, and a third surface which is positioned between the first surface and the second surface on another end side. A plurality of obliquely-inclined partial reflection surfaces are disposed between the first surface and the second surface, and the third surface is inclined in the same direction as that of the partial reflection surface. The third surface is configured with an anti-reflection surface for image light beams traveling through the light guide portion, and is covered by an anti-reflection film, a light absorption layer, a moth-eye type roughened surface, or the like. Therefore, occurrence of stray light due to reflection by the third surface can be suppressed.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: December 17, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Hayato Matsuki, Takashi Takeda
  • Patent number: 10502961
    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: August 9, 2018
    Date of Patent: December 10, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Toshiaki Miyao, Takahiro Totani, Masayuki Takagi, Takashi Takeda, Akira Komatsu, Kazuya Kamakura
  • Patent number: 10495883
    Abstract: An image display device with which it is possible to visually recognize an image while securing the see-through property regardless of eye movements and changes in interpupillary distance, with which it is possible to display a large-size image with high quality, and which is small, has excellent wearability, and has an excellent external appearance.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: December 3, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Osamu Yokoyama, Masatoshi Yonekubo, Takashi Takeda, Daisuke Ishida, Mitsutaka Ide, Hidemitsu Sorimachi
  • Patent number: 10481398
    Abstract: In an image generation unit, a light emitting part is formed using a self-emitting OLED device, and thereby, high-contrast images can be formed and the life of the light emitting part and the life of the virtual image display apparatus are extended. Even when the light emitted in the light emitting part has deviation in color balance, a half-mirror layer that has light transmissivity and realizes see-through vision is a reflection film having wavelength dependence, and thereby, a uniform color balance of image lights is achieved and images in good conditions are visually recognized.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: November 19, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Toshiaki Miyao, Takahiro Totani, Masayuki Takagi, Takashi Takeda, Akira Komatsu, Takeshi Koshihara, Kunihiko Yano
  • Patent number: 10481686
    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: Grant
    Filed: March 19, 2018
    Date of Patent: November 19, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akira Komatsu, Takashi Takeda, Toshiaki Miyao, Masayuki Takagi