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).

  • Patent number: 11567327
    Abstract: 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: Grant
    Filed: January 29, 2021
    Date of Patent: January 31, 2023
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Masatoshi Yonekubo, Takashi Takeda, Mitsutaka Ide
  • Patent number: 11550155
    Abstract: A virtual image display apparatus includes an image light generation device, a projection optical system configured to project image light emitted from the image light generation device, a folding mirror configured to reflect the image light from the projection optical system in an intersection direction, a semi-transmissive mirror configured to reflect a part of the image light from the folding mirror, and a concave mirror configured to reflect the image light from the semi-transmissive mirror forming an exit pupil, in which the folding mirror is disposed between the semi-transmissive mirror and the concave mirror when viewed in a first direction, provided that the first direction is a direction from an intersection point between a projection optical axis that is an optical axis of the projection optical system and the folding mirror toward an emission optical axis that is an optical axis from the concave mirror toward the exit pupil.
    Type: Grant
    Filed: March 30, 2021
    Date of Patent: January 10, 2023
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Daiki Matsumoto, Masatoshi Yonekubo, Takashi Takeda
  • Patent number: 11550154
    Abstract: 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: Grant
    Filed: October 29, 2020
    Date of Patent: January 10, 2023
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Masayuki Takagi, Tokito Yamaguchi, Toshiaki Miyao, Takashi Takeda
  • Patent number: 11536967
    Abstract: 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: Grant
    Filed: October 28, 2020
    Date of Patent: December 27, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Toshiaki Miyao, Masayuki Takagi, Tokito Yamaguchi, Takashi Takeda
  • Patent number: 11506895
    Abstract: 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: Grant
    Filed: November 29, 2019
    Date of Patent: November 22, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Toshiaki Miyao, Masayuki Takagi, Takashi Takeda, Tokito Yamaguchi
  • Patent number: 11480799
    Abstract: 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: Grant
    Filed: September 1, 2021
    Date of Patent: October 25, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Masayuki Takagi, Akira Komatsu, Takashi Takeda, Toshiaki Miyao, Tokito Yamaguchi
  • Patent number: 11448882
    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: Grant
    Filed: August 29, 2019
    Date of Patent: September 20, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takashi Takeda, Masayuki Takagi, Toshiaki Miyao, Tokito Yamaguchi
  • Patent number: 11435588
    Abstract: 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: Grant
    Filed: August 27, 2020
    Date of Patent: September 6, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takashi Takeda, Masayuki Takagi, Toshiaki Miyao, Tokito Yamaguchi
  • Publication number: 20220276476
    Abstract: An optical unit and an image display device include a display element configured to emit imaging light, a first mirror having partial transparency and configured to reflect a portion of the imaging light emitted from the display element, and a second mirror configured to return the imaging light reflected by the first mirror to the first mirror to form an exit pupil. The imaging light is incident on the first mirror from the display element at a first incident angle, and the imaging light is incident on the first mirror at a second incident angle that is smaller than the first incident angle from the second mirror, and the first mirror includes an angle dependent separation film that shows different separation characteristics for the imaging light according to the difference between the first incident angle and the second incident angle.
    Type: Application
    Filed: February 24, 2022
    Publication date: September 1, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takashi TAKEDA, Masayuki TAKAGI, Kunihiko YANO
  • Publication number: 20220243126
    Abstract: Provided are a new phosphor having emission characteristics different from the conventional nitride or oxynitride phosphor, a manufacturing method, and a light-emitting device. In an embodiment, the phosphor may include inorganic substance having crystal represented by A26(D, E)51X86 including at least A, D, X (A is at least one kind of element selected from Mg, Ca, Sr, and Ba; and D is Si, and X is at least one kind of element selected from O, N, and F); and further includes, if necessary, E (E is at least one kind of element selected from B, Al, Ga, and In) wherein the crystal further includes M (M is at least one kind of element selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb). Upon irradiation of excitation source, the maximum value of emission peak in a wavelength range from 630 nm to 850 nm may occur.
    Type: Application
    Filed: March 31, 2020
    Publication date: August 4, 2022
    Applicant: National Institute for Materials Science
    Inventors: Naoto HIROSAKI, Takashi TAKEDA, Shiro FUNAHASHI
  • Publication number: 20220242376
    Abstract: A braking control device includes a stop holding controller and an uneven-ground traveling determination unit. After the vehicle makes a stop and a brake operation performed by a driver who drives the vehicle is canceled, the stop holding controller is configured to perform execution of a stop holding control that includes holding braking force of the vehicle and canceling the braking force in response to a predetermined start operation performed by the driver. The uneven-ground traveling determination unit is configured to determine whether the vehicle is traveling on an uneven ground. The stop holding controller is configured to disable the execution of the stop holding control in a case where the uneven-ground traveling determination unit determines that the vehicle is traveling on the uneven ground.
    Type: Application
    Filed: January 13, 2022
    Publication date: August 4, 2022
    Inventor: Takashi TAKEDA
  • Patent number: 11397326
    Abstract: 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: Grant
    Filed: November 27, 2020
    Date of Patent: July 26, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Tokito Yamaguchi, Masayuki Takagi, Toshiaki Miyao, Akira Komatsu, Takashi Takeda
  • Publication number: 20220203970
    Abstract: A vehicle control apparatus includes a braking controller individually controlling braking forces of braking devices for left and right front and rear wheels, a side collision detector detecting a side collision against a vehicle, and a yaw behavior detector detecting yaw behavior of a vehicle body. If the yaw behavior detected after the side collision is such that a rear of the vehicle body shifts away from a collision side relative to a front thereof, the braking controller executes yaw amplification control to cause the braking device for the collision-side front wheel to generate a braking force larger than the remaining wheels. If the detected yaw behavior is such that the front shifts away from the collision side relative to the rear, the braking controller executes the yaw amplification control to cause the braking device for the collision-side rear wheel to generate a braking force larger than the remaining wheels.
    Type: Application
    Filed: December 16, 2021
    Publication date: June 30, 2022
    Inventors: Eiichi SHIRAISHI, Takashi TAKEDA, Shintaro IKEDA, Satoru AKIYAMA
  • Publication number: 20220203943
    Abstract: A vehicle controller includes a collision detector, a braking controller, a motional state detector, and a minor collision determiner. The collision detector is configured to detect a collision between a vehicle and another object. The braking controller is configured to cause a braking device of the vehicle to generate a braking force in accordance with the detecting of the collision by the collision detector. The motional state detector is configured to detect a motional state of the vehicle. The minor collision determiner is configured to determine, based on an output from the motional state detector, that a minor collision occurs that is a collision not detected by the collision detector. The braking controller is configured to cause the braking device to generate the braking force if the collision detector does not detect the collision and the minor collision determiner determines that the minor collision occurs.
    Type: Application
    Filed: November 29, 2021
    Publication date: June 30, 2022
    Inventors: Eiichi SHIRAISHI, Takashi TAKEDA, Shintaro IKEDA, Satoru AKIYAMA
  • Publication number: 20220185263
    Abstract: A vehicle control apparatus includes a contact detector, an attitude stabilization processor, and a steering intention determining unit. The contact detector is configured to detect a contact of a vehicle with an object. The attitude stabilization processor is configured to execute an attitude stabilization control that generates a yaw moment at a vehicle body on the basis of a deviation between a target yaw rate and an actual yaw rate. The steering intention determining unit is configured to determine a presence of a driver's intention to perform steering. The attitude stabilization processor is configured to stop the generation of the yaw moment by the attitude stabilization control or reduce the yaw moment to be generated by the attitude stabilization control, in a case where the steering intention determining unit determines that the driver's intention to perform the steering is absent after the detection of the contact by the contact detector.
    Type: Application
    Filed: November 23, 2021
    Publication date: June 16, 2022
    Inventors: Satoru AKIYAMA, Eiichi SHIRAISHI, Takashi TAKEDA, Shintaro IKEDA
  • Publication number: 20220191289
    Abstract: A control portion (10) of a network equipment (1) attempts, when connected to other equipment, connection by using a predetermined communication parameter through communication portions (11, 12), and in a case that the communication is not established, the control portion (10) executes negotiation and establishes communication with the other equipment by using an agreed communication parameter.
    Type: Application
    Filed: March 10, 2020
    Publication date: June 16, 2022
    Applicant: OMRON Corporation
    Inventor: Takashi TAKEDA
  • Publication number: 20220171194
    Abstract: A display device or optical module includes a display element that emits image light, an imaging optical system as a light guide optical device that has non-axial symmetry in a predetermined direction and forms an exit pupil by light guiding of the image light from the display element, and a light-shielding member disposed between the display element and the imaging optical system, wherein the light-shielding member has a light-shielding part disposed to overlap an unused region in which an image is not displayed in a display region of the display element.
    Type: Application
    Filed: November 29, 2021
    Publication date: June 2, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Toshiyuki Noguchi, Takashi Takeda
  • Publication number: 20220171195
    Abstract: A virtual image display apparatus includes a first display device for a right eye, a second display device for a left eye, and an adjustment device configured to adjust display positions, and the first display device and the second display device are configured to guide imaging light in a second direction intersecting a first direction in which the first display device and the second display device are aligned, and display the first image and the second image and the adjustment device makes an adjustment to provide an overlapping area in which the first image and the second image are visually recognized in the overlapping area and an independent area in which the first image and the second image are visually recognized independently.
    Type: Application
    Filed: November 29, 2021
    Publication date: June 2, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Takashi TAKEDA
  • Publication number: 20220163805
    Abstract: Provided is a display module including a display element, and a light-guiding optical device that guides image light emitted from the display element to form an exit pupil, in which the light-guiding optical device is an off-axis optical system. The off-axis optical system includes a first optical surface, a second optical surface, a first light-shielding portion, the first light-shielding portion being formed at the first optical surface, and a second light-shielding portion, the second light-shielding portion being formed at the second optical surface, in which the first light-shielding portion exposes, through a first aperture, a part of the first optical surface, and the second light-shielding portion exposes, through a second aperture, a part of the second optical surface, the first aperture and the second aperture having mutually different shapes.
    Type: Application
    Filed: November 23, 2021
    Publication date: May 26, 2022
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Takashi TAKEDA
  • Patent number: 11327309
    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: Grant
    Filed: July 29, 2019
    Date of Patent: May 10, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takashi Takeda, Masayuki Takagi, Toshiaki Miyao, Tokito Yamaguchi