Patents by Inventor Kazushi KIYOTA

Kazushi KIYOTA 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: 11022847
    Abstract: Provided is a liquid crystal display in lateral-electric-field mode that improves faulty display resulting from static electricity without, in particular, degrading display quality or considerably increasing costs. A liquid crystal display in one aspect of the present invention includes the following: an array substrate and counter substrate processed into a thin plate that is less than 0.5 mm thick; a liquid crystal layer sealed between this pair of substrates; and an alignment film disposed on the counter substrate. The alignment film has a photoconductivity in which the volume resistance value of the alignment film under light irradiation changes to at least not greater than 1/10 of the volume resistance value of the alignment film under no light irradiation.
    Type: Grant
    Filed: October 29, 2019
    Date of Patent: June 1, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazushi Kiyota
  • Publication number: 20200393727
    Abstract: A liquid crystal display device includes an array substrate on which a plurality of thin film transistors are arranged, a counter substrate arranged to face the array substrate, a liquid crystal layer interposed between the array substrate and the counter substrate, and a liquid crystal panel of a transverse field system in which liquid crystal is driven by an electric field generated in a direction parallel to the array substrate and the counter substrate. The liquid crystal panel includes a first alignment film provided on the array substrate side, and a second alignment film provided on the counter substrate side. The first and second alignment films have photo-alignment properties. At least one of the first and second alignment films has a surface on which weak rubbing treatment is performed, of which pushing amount of the rubbing roller in the rubbing treatment is in the range of 0.01 to 0.30 mm.
    Type: Application
    Filed: May 22, 2020
    Publication date: December 17, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventor: Kazushi KIYOTA
  • Publication number: 20200241343
    Abstract: An absorption axis of the second polarizing plate provided on a counter substrate is parallel to an alignment axis of the liquid crystal molecules of a liquid crystal layer, the biaxial retardation film is arranged such that a slow axis of the biaxial retardation film forms a first angle formed counterclockwise with the absorption axis or formed clockwise with the alignment axis in a plane of the liquid crystal panel, and a transmission axis of a first polarizing plate provided on an array substrate is arranged such that the transmission axis of the first polarizing plate forms a second angle larger than the first angle from the absorption axis or the alignment axis in the same direction as the first angle in the plane of the liquid crystal panel.
    Type: Application
    Filed: August 8, 2018
    Publication date: July 30, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Manabu IWAKAWA, Naoko IWASAKI, Toshiaki FUJINO, Akira TAMATANI, Kazushi KIYOTA, Hironori MATSUEDA
  • Publication number: 20200166809
    Abstract: Provided is a liquid crystal display in lateral-electric-field mode that improves faulty display resulting from static electricity without, in particular, degrading display quality or considerably increasing costs. A liquid crystal display in one aspect of the present invention includes the following: an array substrate and counter substrate processed into a thin plate that is less than 0.5 mm thick; a liquid crystal layer sealed between this pair of substrates; and an alignment film disposed on the counter substrate. The alignment film has a photoconductivity in which the volume resistance value of the alignment film under light irradiation changes to at least not greater than 1/10 of the volume resistance value of the alignment film under no light irradiation.
    Type: Application
    Filed: October 29, 2019
    Publication date: May 28, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventor: Kazushi KIYOTA
  • Patent number: 10564486
    Abstract: Provided is a liquid crystal display that achieves both reliability and a narrowed-down frame at a relatively high level. In a liquid crystal display according to an aspect of the present invention, alignment films are disposed on a surface of an array substrate and a surface of a counter substrate. The alignment films are each disposed in a display region and each have an overlap with part of the inside of a sealant. The surfaces of the substrates in the overlaps each have an uneven surface. All over an outer edge portion of the sealant, a portion is disposed in which the sealant is joined to the surfaces of the individual substrates without the alignment films interposed therebetween.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: February 18, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazushi Kiyota
  • Publication number: 20190285919
    Abstract: There is provided a display device that is provided with a display panel having a non-rectangular outline that is incorporated in a curved state, the display panel including a glass substrate that is provided in its side along a curving direction of the display panel with an inflection point of an outline formed by at least one of the combination of curved lines or straight lines, and the combination of the curved line and straight line, the glass substrate including a curved portion in an arc-like shape with a first curvature radius in a portion including the inflection point of the outline, serving as an inflection-suppressing region for suppressing a variation in the side along the curved direction, the curved portion being formed to have the first curvature radius more than 5 mm.
    Type: Application
    Filed: February 14, 2019
    Publication date: September 19, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kazushi KIYOTA, Takanori OKUMURA
  • Publication number: 20180314097
    Abstract: Provided is a liquid crystal display that achieves both reliability and a narrowed-down frame at a relatively high level. In a liquid crystal display according to an aspect of the present invention, alignment films are disposed on a surface of an array substrate and a surface of a counter substrate. The alignment films are each disposed in a display region and each have an overlap with part of the inside of a sealant. The surfaces of the substrates in the overlaps each have an uneven surface. All over an outer edge portion of the sealant, a portion is disposed in which the sealant is joined to the surfaces of the individual substrates without the alignment films interposed therebetween.
    Type: Application
    Filed: April 5, 2018
    Publication date: November 1, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventor: Kazushi KIYOTA
  • Publication number: 20150253629
    Abstract: A liquid crystal display device according to the present invention is a liquid crystal display device including a substrate, and an alignment film on the substrate. The alignment film includes a first layer on the substrate, and a second layer on the first layer. The first layer has a higher amount of crosslinking agent added than that of the second layer.
    Type: Application
    Filed: March 2, 2015
    Publication date: September 10, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Kazushi KIYOTA