Patents by Inventor Toshiharu Matsushima

Toshiharu Matsushima 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: 10649287
    Abstract: In this display device, an electrode layer for an upper electrode and a lower electrode is formed on an array substrate via a dielectric film, one of the upper electrode and the lower electrode is a pixel electrode, the other thereof is a common electrode, and an opening portion for generating horizontal electric field in a liquid crystal layer is formed in accordance with a shape of the electrode layer in a plan view. A CF substrate has a light-shielding film (BM) including a lateral BM portion. The opening portion has a plurality of slits in an X direction, and an end portion of an outermost slit in a Y direction is concealed by the lateral BM portion overlapped in a Z direction.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: May 12, 2020
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Patent number: 10642103
    Abstract: According to one embodiment, a display device includes first and second substrates, and liquid crystal layer. The first substrate includes first and second electrodes. The second electrode includes comblike electrodes extending in parallel to a first direction and tapered toward tips thereof, and a connecting portion which connects the comblike electrodes. An initial alignment direction is parallel to the first direction or a direction orthogonal to the first direction. The comblike electrode includes a first part having sides each form a first angle with the first direction, and a second part having sides each form a second angle with the first direction, the second angle being greater than the first angle.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: May 5, 2020
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Patent number: 10578932
    Abstract: According to an aspect, a liquid crystal display device includes: a first substrate and a second substrate that face each other; a liquid crystal layer provided between the first substrate and the second substrate; and a first electrode and a second electrode provided between the first substrate and the liquid crystal layer. The first electrode includes: at least an electrode base portion that extends in a first direction; and a plurality of comb-shaped portions that protrude from the electrode base portion at a fixed distance away from each other, and extend in a second direction different from the first direction. Each comb-shaped portion has a coupling portion layered on or under the electrode base portion.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: March 3, 2020
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Toshiharu Matsushima
  • Patent number: 10571749
    Abstract: According to one embodiment, a liquid crystal display device includes second substrates, a light-shielding layer, and a liquid crystal layer. The first substrate includes pixel electrodes, a common electrode, and subpixel areas each including area in which the pixel electrode is present and a second area in which the pixel electrode is not present. Each of the subpixel areas includes first and second sides. The first area includes an axial area and branch areas. The second area includes a gap area between the adjacent branch areas. The axial area includes a projection portion projecting to the second side and in alignment with the gap area, and overlaps the light-shielding layer.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: February 25, 2020
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Patent number: 10564489
    Abstract: A liquid crystal display device according to an aspect of the present invention includes a first substrate including a pixel electrode and a common electrode, a second substrate opposed to the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate. The pixel or common electrode includes, in a single subpixel, belt-like portions arranged in a first direction, and coupling portions coupling the adjacent belt-like portions. Each belt-like portion continuously extends from one side to an other side of a central line of the subpixel, that is parallel with the first direction. The coupling portions include one or more first coupling portions provided on the one side of the central line, and one or more second coupling portions provided on the other side of the central line.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: February 18, 2020
    Assignee: Japan Display Inc.
    Inventors: Toshiharu Matsushima, Daichi Suzuki
  • Publication number: 20190369446
    Abstract: According to one embodiment, a display device includes a first substrate with a first alignment film, a second substrate with a second alignment film, and a liquid crystal layer interposed therebetween. The first substrate has first and second electrodes. An initial alignment direction of liquid crystal molecules of the liquid crystal layer is parallel to a first direction or a direction orthogonal to the first direction. The second electrode includes comblike electrodes extending parallel to the first direction and a connecting portion which connects the comblike electrodes. The connecting portion includes a projection which projects in a second direction more than an outermost comblike electrode.
    Type: Application
    Filed: August 16, 2019
    Publication date: December 5, 2019
    Applicant: Japan Display Inc.
    Inventor: Toshiharu MATSUSHIMA
  • Patent number: 10488711
    Abstract: According to one embodiment, a display device includes a first substrate with a first alignment film, a second substrate with a second alignment film, and a liquid crystal layer interposed therebetween. The first substrate has first and second electrodes. An initial alignment direction of liquid crystal molecules of the liquid crystal layer is parallel to a first direction or a direction orthogonal to the first direction. The second electrode includes comblike electrodes extending parallel to the first direction and a connecting portion which connects the comblike electrodes. The connecting portion includes a projection which projects in a second direction more than an outermost comblike electrode.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: November 26, 2019
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Patent number: 10473988
    Abstract: A display device includes an electrode layer and a liquid crystal layer. The electrode layer has a first electrode and a second electrode. The second electrode is opposed to the first electrode and having a plurality of openings extending in a same extending direction. The liquid crystal layer is disposed on the electrode layer. The liquid crystal molecules of the liquid crystal layer in a region in proximity to one side of the opening and liquid crystal molecules of the liquid crystal layer in a region in proximity to another side of the opening, the sides of the opening being opposed to each other in a width direction of the opening, are rotated in opposite directions from each other and aligned.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: November 12, 2019
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Publication number: 20190331968
    Abstract: According to one embodiment, a liquid crystal display device includes scanning and video signal lines, pixel electrodes and first and second common electrodes. The pixel electrodes include first and second pixel electrodes with linear electrodes and connection portion. In the first pixel electrodes, the linear electrodes overlap the first common electrode, and the connection portion overlaps first slit between the first and second common electrodes. In the second pixel electrodes, the linear electrodes overlap the second common electrode, and the connection portion overlaps second slit between the second and first common electrodes. Different potentials are applied to the first and second common electrodes.
    Type: Application
    Filed: April 4, 2019
    Publication date: October 31, 2019
    Applicant: Japan Display Inc.
    Inventors: Toshiharu MATSUSHIMA, Tatsuya YATA
  • Publication number: 20190294010
    Abstract: A display device includes an electrode layer and a liquid crystal layer. The electrode layer has a first electrode and a second electrode. The second electrode is opposed to the first electrode and having a plurality of openings extending in a same extending direction. The liquid crystal layer is disposed on the electrode layer. The liquid crystal molecules of the liquid crystal layer in a region in proximity to one side of the opening and liquid crystal molecules of the liquid crystal layer in a region in proximity to another side of the opening, the sides of the opening being opposed to each other in a width direction of the opening, are rotated in opposite directions from each other and aligned.
    Type: Application
    Filed: June 7, 2019
    Publication date: September 26, 2019
    Inventor: Toshiharu Matsushima
  • Patent number: 10416497
    Abstract: According to one embodiment, a liquid crystal display device includes first and second electrodes. A subpixel area includes a first area in which the first electrode is formed, and a second area in which the first electrode is not formed. The first area includes a connective area extending in first directions, and branch areas extending from the connective area. The subpixel areas include a first and second subpixel areas. The first directions intersect with second directions. Each of the branch areas extends from the connective area in the second direction 2A in the first subpixel area, and each of the branch areas extends from the connective area in the second direction 2B in the second subpixel area.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: September 17, 2019
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Publication number: 20190250471
    Abstract: In one embodiment, a liquid crystal display device comprises a first and second substrates and a liquid crystal layer. The first substrate comprises subpixels, first and second common electrodes, and a pixel electrode. Each of the subpixels comprises an axial area, branch areas, and gap areas. The second edge comprises concave portions. The axial and branch areas are areas in which the second common electrode is not present, and the pixel electrode is present. The gap areas are areas in which the second common electrode is present. The concave portions are areas in which the second common electrode and the pixel electrode are not present, and the first common electrode is present.
    Type: Application
    Filed: April 23, 2019
    Publication date: August 15, 2019
    Applicant: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Patent number: 10371978
    Abstract: According to an aspect, a liquid crystal display device includes a first substrate; a second substrate arranged to be opposed to the first substrate; a liquid crystal layer arranged between the first substrate and the second substrate; a first electrode arranged for each of a plurality of pixels that are arranged in a matrix; a second electrode arranged at a position opposed to the first electrode; a plurality of first areas in which light transmission is suppressed between the first substrate and the second substrate, the first areas extending in at least one direction to traverse the pixels; and a second area in which liquid crystal molecules in the liquid crystal layer are rotated according to an electric field acting between the first electrode and the second electrode, the second area being sandwiched between the first areas.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: August 6, 2019
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Publication number: 20190204688
    Abstract: According to one embodiment, a display device includes a first substrate with a first alignment film, a second substrate with a second alignment film, and a liquid crystal layer interposed therebetween. The first substrate has first and second electrodes. An initial alignment direction of liquid crystal molecules of the liquid crystal layer is parallel to a first direction or a direction orthogonal to the first direction. The second electrode includes comblike electrodes extending parallel to the first direction and a connecting portion which connects the comblike electrodes. The connecting portion includes a projection which projects in a second direction more than an outermost comblike electrode.
    Type: Application
    Filed: February 28, 2019
    Publication date: July 4, 2019
    Applicant: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Patent number: 10317752
    Abstract: In one embodiment, a liquid crystal display device comprises a first and second substrates and a liquid crystal layer. The first substrate comprises subpixels, first and second common electrodes, and a pixel electrode. Each of the subpixels comprises an axial area, branch areas, and gap areas. The second edge comprises concave portions. The axial and branch areas are areas in which the second common electrode is not present, and the pixel electrode is present. The gap areas are areas in which the second common electrode is present. The concave portions are areas in which the second common electrode and the pixel electrode are not present, and the first common electrode is present.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: June 11, 2019
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Publication number: 20190146287
    Abstract: In this display device, an electrode layer for an upper electrode and a lower electrode is formed on an array substrate via a dielectric film, one of the upper electrode and the lower electrode is a pixel electrode, the other thereof is a common electrode, and an opening portion for generating horizontal electric field in a liquid crystal layer is formed in accordance with a shape of the electrode layer in a plan view. A CF substrate has a light-shielding film (BM) including a lateral BM portion. The opening portion has a plurality of slits in an X direction, and an end portion of an outermost slit in a Y direction is concealed by the lateral BM portion overlapped in a Z direction.
    Type: Application
    Filed: January 14, 2019
    Publication date: May 16, 2019
    Inventor: Toshiharu MATSUSHIMA
  • Publication number: 20190146255
    Abstract: The present display device includes a liquid crystal panel having a liquid crystal layer between an array substrate and a facing substrate. The array substrate has an electrode layer having an upper electrode and a lower electrode facing each other in a Z direction, and an opening including a plurality of slits extending in an X direction is formed in the upper electrode and the lower electrode. The liquid crystal layer is provided on the electrode layer, liquid crystal molecules in vicinity regions on one side and the other side of the opening which face each other in a width direction of each slit are oriented as rotating in reverse to each other, and the facing substrate has a conductive layer.
    Type: Application
    Filed: January 10, 2019
    Publication date: May 16, 2019
    Inventor: Toshiharu MATSUSHIMA
  • Publication number: 20190146286
    Abstract: According to an aspect, a liquid-crystal display device includes a first substrate, a second substrate, and a liquid-crystal layer. The first substrate includes a first electrode and a second electrode, and one of the first electrode and the second electrode is a pixel electrode provide, the first electrode includes an electrode base portion extending in a first direction and comb tooth portions extending in a second direction and protruding in a comb teeth shape from the electrode base portion with a predetermined distance interposed therebetween, and adjacent comb tooth portions include adjacent comb tooth portions having a relation in which a first long side of one comb tooth portion closest to a boundary between pixels is not parallel to a first long side of the other comb tooth portion.
    Type: Application
    Filed: January 10, 2019
    Publication date: May 16, 2019
    Inventor: Toshiharu MATSUSHIMA
  • Patent number: 10261364
    Abstract: According to one embodiment, a display device includes a first substrate with a first alignment film, a second substrate with a second alignment film, and a liquid crystal layer interposed therebetween. The first substrate has first and second electrodes. An initial alignment direction of liquid crystal molecules of the liquid crystal layer is parallel to a first direction or a direction orthogonal to the first direction. The second electrode includes comblike electrodes extending parallel to the first direction and a connecting portion which connects the comblike electrodes. The connecting portion includes a projection which projects in a second direction more than an outermost comblike electrode.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: April 16, 2019
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Patent number: 10254599
    Abstract: According to an aspect, a liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer, a first electrode, and a second electrode. The first electrode includes an electrode base portion extending in a first direction, and a plurality of comb tooth portions extending in a second direction different from the first direction and protruding from the electrode base portion with a certain distance interposed therebetween. At least one of the first substrate and the second substrate includes a light-blocking part that reduces intensity of light passing therethrough at a position overlapping with at least one of the center of the comb tooth portion and the center between the adjacent comb tooth portions in a direction perpendicular to the first substrate.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: April 9, 2019
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima