Patents by Inventor Junichi Wakabayashi

Junichi Wakabayashi 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: 11762271
    Abstract: A projector includes an image light generator configured to modulate light emitted from a light source to generate image light, a projection optical device configured to project the image light, a polarization switching element disposed at a light exit side of the image light generator and configured to switch a polarization state of the image light emitted from the image light generator, and a controller configured to control the polarization switching element. The controller controls the polarization switching element to switch the polarization state of the image light with a predetermined period.
    Type: Grant
    Filed: March 29, 2022
    Date of Patent: September 19, 2023
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Junichi Wakabayashi, Junichi Suzuki, Ryuta Koizumi, Masaya Masuda, Hidenori Kawata, Yoshitomo Kumai
  • Publication number: 20230074488
    Abstract: A projector includes a lamp unit, a color separation system that separates first light outputted from the lamp unit into a plurality of color beams, a plurality of liquid crystal panels that modulate the plurality of separated color beams from the color separation system, reduction optical systems that reduce at least one of pencils of light formed of the plurality of color beams modulated by the plurality of liquid crystal panels, a light combining prism that combines the plurality of reduced color beams with one another, and a projection lens that projects second light that is the combined light from the light combining prism. The reduction optical systems are disposed between the liquid crystal panels and the light combining prism, and the area of an effective display region of each of the liquid crystal panels is greater than an effective area of each light incident surface of the light combining prism.
    Type: Application
    Filed: September 6, 2022
    Publication date: March 9, 2023
    Inventor: Junichi WAKABAYASHI
  • Publication number: 20220308437
    Abstract: A projector includes an image light generator configured to modulate light emitted from a light source to generate image light, a projection optical device configured to project the image light, a polarization switching element disposed at a light exit side of the image light generator and configured to switch a polarization state of the image light emitted from the image light generator, and controller configured to control the polarization switching element. The controller controls the polarization switching element to switch the polarization state of the image light with a predetermined period.
    Type: Application
    Filed: March 29, 2022
    Publication date: September 29, 2022
    Inventors: Junichi WAKABAYASHI, Junichi SUZUKI, Ryuta KOIZUMI, Masaya MASUDA, Hidenori KAWATA, Yoshitomo KUMAI
  • Patent number: 11402731
    Abstract: A microlens array substrate includes a substrate having a first surface and a plurality of recesses corresponding to a plurality of pixels, and a microlens array including a plurality of microlenses corresponding to the plurality of recesses. The microlenses each have a refractive index different from a refractive index of the substrate, and each have a light incident surface and a light exiting surface. The light incident surface has a first curvature region and a second curvature region. The second curvature region surrounds the first curvature region when viewed along the optical axis of one microlens and has a curvature greater than the curvature of the first curvature region. The light exiting surface includes a light collecting structure configured to converge the light incident via the light incident surface. The light collecting structure overlaps with part of the first curvature region when viewed along the optical axis.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: August 2, 2022
    Assignee: Seiko Epson Corporation
    Inventors: Junichi Wakabayashi, Akihide Haruyama
  • Publication number: 20210173289
    Abstract: A microlens array substrate includes a substrate having a first surface and a plurality of recesses corresponding to a plurality of pixels, and a microlens array including a plurality of microlenses corresponding to the plurality of recesses. The microlenses each have a refractive index different from a refractive index of the substrate, and each have a light incident surface and a light exiting surface. The light incident surface has a first curvature region and a second curvature region. The second curvature region surrounds the first curvature region when viewed along the optical axis of one microlens and has a curvature greater than the curvature of the first curvature region. The light exiting surface includes a light collecting structure configured to converge the light incident via the light incident surface. The light collecting structure overlaps with part of the first curvature region when viewed along the optical axis.
    Type: Application
    Filed: October 30, 2020
    Publication date: June 10, 2021
    Inventors: Junichi WAKABAYASHI, Akihide HARUYAMA
  • Patent number: 10606127
    Abstract: In a liquid crystal apparatus, a second substrate is provided with an optical compensation layer having inclined surfaces at a first substrate side. A liquid crystal layer includes liquid crystal molecules having negative dielectric anisotropy. While no voltage is applied to the liquid crystal layer, an angle between a long axis direction of the liquid crystal molecules and each of the inclined surfaces is set to an angle smaller than 90°.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: March 31, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Junichi Wakabayashi
  • Patent number: 10598989
    Abstract: In a liquid crystal apparatus, a second substrate is provided with a base layer and an optical compensation layer. A surface of the base layer faces a first substrate and is provided with a plurality of first inclined surfaces. A surface of the optical compensation layer faces the first substrate and is provided with a plurality of second inclined surfaces having a shape reflected with a shape of the plurality of first inclined surfaces. The base layer is provided with boundary grooves between adjacent ones of the first inclined surfaces. The plurality of first inclined surfaces each have a high portion having a maximum height and a low portion having a minimum height when viewed from the second substrate. The high portion is provided with a second flat portion. Between the second flat portion and the low portion, an inclined portion having a height continuously changing is provided.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: March 24, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Junichi Wakabayashi
  • Publication number: 20190265534
    Abstract: In a liquid crystal apparatus, a second substrate is provided with an optical compensation layer having inclined surfaces at a first substrate side. A liquid crystal layer includes liquid crystal molecules having negative dielectric anisotropy. While no voltage is applied to the liquid crystal layer, an angle between a long axis direction of the liquid crystal molecules and each of the inclined surfaces is set to an angle smaller than 90°.
    Type: Application
    Filed: February 26, 2019
    Publication date: August 29, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Junichi WAKABAYASHI
  • Publication number: 20190265535
    Abstract: In a liquid crystal apparatus, a second substrate is provided with a base layer and an optical compensation layer. A surface of the base layer faces a first substrate and is provided with a plurality of first inclined surfaces. A surface of the optical compensation layer faces the first substrate and is provided with a plurality of second inclined surfaces having a shape reflected with a shape of the plurality of first inclined surfaces. The base layer is provided with boundary grooves between adjacent ones of the first inclined surfaces. The plurality of first inclined surfaces each have a high portion having a maximum height and a low portion having a minimum height when viewed from the second substrate. The high portion is provided with a second flat portion. Between the second flat portion and the low portion, an inclined portion having a height continuously changing is provided.
    Type: Application
    Filed: February 27, 2019
    Publication date: August 29, 2019
    Applicant: Seiko Epson Corporation
    Inventor: Junichi WAKABAYASHI
  • Patent number: 10025135
    Abstract: A microlens array substrate includes a substrate, a first microlens that is disposed on a face of the substrate, a first light-transmissive layer that is disposed to cover the first microlens, a second microlens that is disposed on the intermediate layer and is arranged to overlap with the first microlens in a planar view, and a second light-transmissive layer that is disposed to cover the second microlens. A first flat portion is disposed between the first microlenses that neighbor each other at a vertex. A second flat portion is disposed between the second microlenses that neighbor each other at a vertex. The first flat portion and the second flat portion are arranged in order for at least a part of the first flat portion and a part of the second flat portion to overlap with each other in a planar view.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: July 17, 2018
    Assignee: Seiko Epson Corporation
    Inventor: Junichi Wakabayashi
  • Publication number: 20180143490
    Abstract: A microlens array substrate includes a substrate, a first microlens that is disposed on the substrate, and a second microlens that is disposed on the first microlens so as to be overlapped with the first microlens in a plan view, the second microlens is configured with a curved surface and includes a center portion and a peripheral portion that is disposed on the outer side of the center portion, and a curvature of the peripheral portion is larger than a curvature of the center portion.
    Type: Application
    Filed: November 2, 2017
    Publication date: May 24, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Junichi WAKABAYASHI
  • Patent number: 9939632
    Abstract: A substrate, a plurality of mirrors disposed on one surface of the substrate to be separated from the substrate, a mirror support post disposed between the substrate and the mirror and connected to a part of the mirror to support the mirror, a first electrode disposed between a first portion of the mirror and the substrate on the substrate, a second electrode disposed between the substrate and a second portion facing the first portion are included. The mirror includes a thin portion in which a thickness of at least a part of an end portion of a rear surface of the mirror is thinner than a thickness of a middle of the mirror.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: April 10, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Junichi Wakabayashi, Takunori Iki
  • Patent number: 9857622
    Abstract: A microlens array substrate includes a substrate having a surface in which a concave portion is provided, a lens layer that is provided so as to fill the concave portion, and an optical path length adjustment layer that is provided so as to cover the lens layer. A flat portion is disposed in a central portion of the concave portion. A refractive index of the lens layer is higher than a refractive index of the substrate, and a refractive index of the optical path length adjustment layer is higher than a refractive index of the substrate and is equal to or lower than a refractive index of the lens layer.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: January 2, 2018
    Assignee: Seiko Epson Corporation
    Inventor: Junichi Wakabayashi
  • Patent number: 9766379
    Abstract: A microlens array substrate includes: a light transmitting substrate in which a first lens surface formed of a concave surface is formed on a substrate surface on one side; a first lens layer which covers the substrate surface on one side and has a refractive index which is different from that of the light transmitting substrate; a light transmitting layer which covers the first lens layer on the opposite side to the light transmitting substrate; and a second lens layer which covers the light transmitting layer on the opposite side to the light transmitting substrate and in which a second lens surface formed of a convex surface is formed on the opposite side to the light transmitting substrate, in which the light transmitting layer has smaller refractive index and coefficient of thermal expansion than those of the first lens layer and the second lens layer.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: September 19, 2017
    Assignee: Seiko Epson Corporation
    Inventor: Junichi Wakabayashi
  • Patent number: 9664934
    Abstract: A fabricating method of a liquid crystal device includes a first step of forming light blocking portions in an element substrate, a second step of forming first and second microlenses in a counter substrate, and a third step of disposing the element substrate and the counter substrate so as to face each other, such that the openings and the first and second microlenses overlap each other in a planar view, and bonding the element substrate to the counter substrate such that a liquid crystal layer is interposed therebetween. In the third step, a center of the first microlens and a center of the second microlens are disposed in the same side in at least one direction of the X direction and the Y direction with respect to a center of gravity of the opening, in a planar view.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: May 30, 2017
    Assignee: Seiko Epson Corporation
    Inventor: Junichi Wakabayashi
  • Publication number: 20160247475
    Abstract: An electro-optical device includes data lines, scanning lines, pixels including a first pixel, a second pixel, a third pixel, and a fourth pixel disposed to correspond to intersections of the data lines and scanning lines, and an image signal generation unit that generates a first image signal for the first pixel based on a first image data, a first amount data and a first correction data, a second image signal for the second pixel based on a second image data, a second amount data and the first correction data, a third image signal for the third pixel based on a third image data, a third amount data and a second correction data, and a fourth image signal for the fourth pixel based on a fourth image data, a fourth amount data and the second correction data.
    Type: Application
    Filed: May 3, 2016
    Publication date: August 25, 2016
    Inventors: Junichi Wakabayashi, Hidehito Iisaka, Hiroaki Ichimura
  • Patent number: 9411182
    Abstract: A signal processing device, on the basis of signals that control voltages to be applied to pixels, a boundary between a first pixel corresponding to a first signal that applies a first voltage and a second pixel adjacent to the first pixel and corresponding to a second signal that applies a second voltage different from the first voltage at least by a predetermined threshold. The first signal is corrected to a third signal that applies a third voltage higher than the first voltage, and the second signal is corrected to a fourth signal that applies a fourth voltage higher than the second voltage. The second voltage is higher than the first voltage, the fourth voltage is higher than the third voltage, and a potential difference between the first voltage and the third voltage is larger than a potential difference between the second voltage and the fourth voltage.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: August 9, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Junichi Wakabayashi, Haruhiko Nishimura, Hidehito Iisaka
  • Publication number: 20160216509
    Abstract: A substrate, a plurality of mirrors disposed on one surface of the substrate to be separated from the substrate, a mirror support post disposed between the substrate and the mirror and connected to a part of the mirror to support the mirror, a first electrode disposed between a first portion of the mirror and the substrate on the substrate, a second electrode disposed between the substrate and a second portion facing the first portion are included. The mirror includes a thin portion in which a thickness of at least a part of an end portion of a rear surface of the mirror is thinner than a thickness of a middle of the mirror.
    Type: Application
    Filed: January 14, 2016
    Publication date: July 28, 2016
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Junichi WAKABAYASHI, Takunori IKI
  • Patent number: 9355605
    Abstract: Vertical cross-talk is reduced. A correction circuit includes a correction amount calculation unit that calculates a correction amount on the basis of input image data Din and that generates correction amount data U; a correction coefficient generation unit that generates correction coefficient data C which represents a correction coefficient decided upon in accordance with a position in a horizontal scanning direction of a data line to which input image data Din to be corrected is supplied; and a correction unit that corrects the input image data Din on the basis of the correction amount data U and the correction coefficient data C and thereby generates correction image data Dh.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: May 31, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Junichi Wakabayashi, Hidehito Iisaka, Hiroaki Ichimura
  • Publication number: 20160097883
    Abstract: A microlens array substrate includes: a light transmitting substrate in which a first lens surface formed of a concave surface is formed on a substrate surface on one side; a first lens layer which covers the substrate surface on one side and has a refractive index which is different from that of the light transmitting substrate; a light transmitting layer which covers the first lens layer on the opposite side to the light transmitting substrate; and a second lens layer which covers the light transmitting layer on the opposite side to the light transmitting substrate and in which a second lens surface formed of a convex surface is formed on the opposite side to the light transmitting substrate, in which the light transmitting layer has smaller refractive index and coefficient of thermal expansion than those of the first lens layer and the second lens layer.
    Type: Application
    Filed: September 16, 2015
    Publication date: April 7, 2016
    Inventor: Junichi WAKABAYASHI