Patents by Inventor Hirofumi Ohira

Hirofumi Ohira 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: 20210215959
    Abstract: A display device including optical sheet configured to transmit light linearly polarized in first polarization direction; first polarization member configured to absorb light linearly polarized in second polarization direction orthogonal to first polarization direction; front panel disposed between first polarization member and optical sheet, wherein optical sheet is disposed between front panel and display panel, and azimuth at which highest reflectance is obtained in reflective state in which incident light is reflected is azimuth at which highest transmittance is obtained in transmissive state in which incident light is transmitted.
    Type: Application
    Filed: March 26, 2021
    Publication date: July 15, 2021
    Inventors: Hirofumi OHIRA, Koji YOSHIDA
  • Publication number: 20210199999
    Abstract: A display device includes a display panel, and a front panel overlapping with the display panel and being switched into a reflection state in which incident light is reflected and a transmission state in which incident light is transmitted. The front panel includes a first substrate, a second substrate facing the first substrate, a liquid crystal layer sealed between the first substrate and the second substrate, a first translucent electrode provided on a side of the first substrate on which the liquid crystal layer is located, a second translucent electrode provided on a side of the second substrate on which the liquid crystal layer is located, a discharge resistor that is electrically coupled to the second translucent electrode and is provided on the second substrate, and a first conductive pillar that electrically couples the first translucent electrode and the discharge resistor.
    Type: Application
    Filed: March 10, 2021
    Publication date: July 1, 2021
    Inventor: Hirofumi OHIRA
  • Publication number: 20210188175
    Abstract: A display device includes a display panel, and a front panel overlapping with the display panel. The front panel has an active region capable of being switched into a display state in which an image is displayed and a reflection state in which a reflected image is provided and a frame region around the active region, and the frame region is a mirror surface when the active region is the display state and the reflection state.
    Type: Application
    Filed: March 10, 2021
    Publication date: June 24, 2021
    Inventor: Hirofumi OHIRA
  • Publication number: 20210191179
    Abstract: The display device includes a display panel and a front surface panel that is superimposed with the display panel, and that is switched between a reflective state in which incident light is reflected and a transmissive state in which incident light is transmitted. The front surface panel can detect presence of an object to be detected.
    Type: Application
    Filed: February 4, 2021
    Publication date: June 24, 2021
    Applicant: Japan Display Inc.
    Inventors: Koji YOSHIDA, Hirofumi OHIRA, Soichiro OHAMA, Naoki TAKADA, Takayuki NAKANISHI
  • Patent number: 10962848
    Abstract: According to an aspect, a display device capable of displaying an image both in a reflective state in which incident light is reflected and in a transmissive state in which incident light is transmitted, the display device includes: a display panel disposed such that a second direction orthogonal to a first direction on a planar surface of the display panel is closer to parallel to a vertical direction than the first direction is. An azimuth at which the highest reflectance is obtained in the reflective state in which incident light is reflected is at a lower side in the vertical direction and between the first direction and the second direction.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: March 30, 2021
    Assignee: Japan Display, Inc.
    Inventors: Hirofumi Ohira, Koji Yoshida
  • Publication number: 20210063795
    Abstract: A display device comprising: a substrate having a display region; a plurality of temperature detection wires arranged at positions overlapping with the display region in plan view; and a light detection electrode overlapping with temperature detection regions of the temperature detection wires in plan view.
    Type: Application
    Filed: September 1, 2020
    Publication date: March 4, 2021
    Inventors: Hirofumi OHIRA, Koji YOSHIDA, Soichiro OHAMA, Toshihiko TANAKA
  • Publication number: 20200379296
    Abstract: According to an aspect, a display device includes: a coated polarization layer configured to absorb light linearly polarized in a second polarization direction perpendicular to a first polarization direction; an optical sheet configured to reflect light linearly polarized in the first polarization direction and transmit light linearly polarized in the second polarization direction; a front panel disposed between the coated polarization layer and the optical sheet and capable of changing a polarization direction of incident light into another polarization direction in accordance with a voltage applied to the front panel; and a display panel overlapping with the front panel with a polarization plate interposed therebetween, the polarization plate transmitting light linearly polarized in the second polarization direction to the optical sheet.
    Type: Application
    Filed: August 17, 2020
    Publication date: December 3, 2020
    Inventors: Hirofumi Ohira, Koji Yoshida
  • Patent number: 10747049
    Abstract: According to an aspect, a display device includes: a coated polarization layer configured to absorb light linearly polarized in a second polarization direction perpendicular to a first polarization direction; an optical sheet configured to reflect light linearly polarized in the first polarization direction and transmit light linearly polarized in the second polarization direction; a front panel disposed between the coated polarization layer and the optical sheet and capable of changing a polarization direction of incident light into another polarization direction in accordance with a voltage applied to the front panel; and a display panel overlapping with the front panel with a polarization plate interposed therebetween, the polarization plate transmitting light linearly polarized in the second polarization direction to the optical sheet.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: August 18, 2020
    Assignee: Japan Display Inc.
    Inventors: Hirofumi Ohira, Koji Yoshida
  • Publication number: 20200241372
    Abstract: According to an aspect, a display device includes: a substrate having a display region; a shield conductive layer provided above the substrate; and a plurality of wiring units for temperature detection disposed at positions overlapping with the display region and the shield conductive layer when seen in a plan view. Each wiring unit for temperature detection has one end coupled to a first wire and the other end coupled to a second wire to detect resistance that changes in accordance with a change in temperature, between the first wire and the second wire.
    Type: Application
    Filed: January 27, 2020
    Publication date: July 30, 2020
    Inventors: Koji YOSHIDA, Hirofumi OHIRA, Soichiro OHAMA, Toshihiko TANAKA
  • Patent number: 10682959
    Abstract: According to an aspect, a display device includes: a first polarization member configured to absorb light linearly polarized in a second polarization direction orthogonal to a first polarization direction; an optical sheet configured to reflect light linearly polarized in the second polarization direction and transmit light linearly polarized in the first polarization direction; a front panel disposed between the first polarization member and the optical sheet and capable of changing a polarization direction of incident light into another polarization direction in accordance with a voltage applied to the front panel; and a display panel overlapping with the front panel with a second polarization member interposed therebetween, the second polarization member configured to transmit light linearly polarized in the second polarization direction to the optical sheet.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: June 16, 2020
    Assignee: Japan Display Inc.
    Inventors: Hirofumi Ohira, Koji Yoshida
  • Publication number: 20190047476
    Abstract: According to an aspect, a display device includes: a first polarization member configured to absorb light linearly polarized in a second polarization direction orthogonal to a first polarization direction; an optical sheet configured to reflect light linearly polarized in the second polarization direction and transmit light linearly polarized in the first polarization direction; a front panel disposed between the first polarization member and the optical sheet and capable of changing a polarization direction of incident light into another polarization direction in accordance with a voltage applied to the front panel; and a display panel overlapping with the front panel with a second polarization member interposed therebetween, the second polarization member configured to transmit light linearly polarized in the second polarization direction to the optical sheet.
    Type: Application
    Filed: August 2, 2018
    Publication date: February 14, 2019
    Inventors: Hirofumi OHIRA, Koji YOSHIDA
  • Publication number: 20190049787
    Abstract: According to an aspect, a display device capable of displaying an image both in a reflective state in which incident light is reflected and in a transmissive state in which incident light is transmitted, the display device includes: a display panel disposed such that a second direction orthogonal to a first direction on a planar surface of the display panel is closer to parallel to a vertical direction than the first direction is. An azimuth at which the highest reflectance is obtained in the reflective state in which incident light is reflected is at a lower side in the vertical direction and between the first direction and the second direction.
    Type: Application
    Filed: August 8, 2018
    Publication date: February 14, 2019
    Inventors: Hirofumi OHIRA, Koji YOSHIDA
  • Publication number: 20180284538
    Abstract: According to an aspect, a display device includes: a coated polarization layer configured to absorb light linearly polarized in a second polarization direction perpendicular to a first polarization direction; an optical sheet configured to reflect light linearly polarized in the first polarization direction and transmit light linearly polarized in the second polarization direction; a front panel disposed between the coated polarization layer and the optical sheet and capable of changing a polarization direction of incident light into another polarization direction in accordance with a voltage applied to the front panel; and a display panel overlapping with the front panel with a polarization plate interposed therebetween, the polarization plate transmitting light linearly polarized in the second polarization direction to the optical sheet.
    Type: Application
    Filed: March 27, 2018
    Publication date: October 4, 2018
    Inventors: Hirofumi OHIRA, Koji YOSHIDA
  • Patent number: 9188824
    Abstract: According to an aspect, a display device includes: a first substrate; a second substrate arranged opposite to the first substrate; a liquid crystal layer interposed between the first substrate and the second substrate; a plurality of pixels arranged in a matrix on the first substrate; a first scan line arranged between a first row of the pixels and a second row of the pixels adjacent to the first row; a second scan line arranged between the second row of the pixels and the first scan line; and a spacer for maintaining a gap between the first substrate and the second substrate. A first area on which the spacer is disposed overlaps at least part of a second area partitioned by the first scan line and the second scan line.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: November 17, 2015
    Assignee: Japan Display Inc.
    Inventors: Hirofumi Ohira, Akio Ota
  • Publication number: 20140232975
    Abstract: According to an aspect, a display device includes: a first substrate; a second substrate arranged opposite to the first substrate; a liquid crystal layer interposed between the first substrate and the second substrate; a plurality of pixels arranged in a matrix on the first substrate; a first scan line arranged between a first row of the pixels and a second row of the pixels adjacent to the first row; a second scan line arranged between the second row of the pixels and the first scan line; and a spacer for maintaining a gap between the first substrate and the second substrate. A first area on which the spacer is disposed overlaps at least part of a second area partitioned by the first scan line and the second scan line.
    Type: Application
    Filed: February 12, 2014
    Publication date: August 21, 2014
    Applicant: JAPAN DISPLAY INC.
    Inventors: Hirofumi Ohira, Akio Ota
  • Publication number: 20070024778
    Abstract: Provided is a semi-transmissive liquid crystal display device having a pair of substrates 11, 21, which employs ECB mode liquid crystals in which a protruding portion 23 used for adjusting a cell gap provided on a reflective portion 15 of each pixel in one of the substrates extends in a first direction, wherein a liquid crystal injection inlet “a” is provided at a position such that an angle ? between a tangent “c” of a circular arc “b” drawn with the liquid crystal injection inlet “a” as its center and the orienting direction of an alignment layer on the side comprising the protruding portion 23, is never at a right angle when the orienting direction of the alignment layer formed on one of the substrates intersects with the protruding portion 23, or is provided at a position such that a contact point of the tangent “c” where the circular arc “b” tangent “c” and the orienting direction of the alignment layer on the side comprising the protruding portion 23 are at a right angle is on an edge of the glass subst
    Type: Application
    Filed: July 25, 2006
    Publication date: February 1, 2007
    Applicant: SANYO EPSON IMAGING DEVICES CORP.
    Inventors: Masayuki Kametani, Hirofumi Ohira