Patents by Inventor Kazuhiko Tsuda

Kazuhiko Tsuda 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: 10989955
    Abstract: A liquid crystal display device includes a first glass substrate, a second glass substrate, a first liquid crystal layer disposed between the first glass substrate and the second glass substrate, a third glass substrate, a fourth glass substrate, a second liquid crystal layer disposed between the third glass substrate and the fourth glass substrate, a first polarizing plate formed on the first glass substrate, a second polarizing plate formed on the third glass substrate, and a bonding layer disposed between the first glass substrate and the third glass substrate. In planar view, the bonding layer is disposed outside the first polarizing plate and the second polarizing plate, a surface on the bonding layer bonds to the first glass substrate, and a surface on the bonding layer bonds to the third glass substrate.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: April 27, 2021
    Assignees: Panasonic Liquid Crystal Display Co., Ltd., Pasona Knowledge Partner Inc.
    Inventors: Yoichi Yasui, Takenori Yaguchi, Takaaki Kitada, Kazuhiko Tsuda, Takashi Kato, Hidenori Kikuchi, Naoki Terasawa, Katsuji Tanaka
  • Patent number: 10983399
    Abstract: A method for manufacturing a liquid crystal display device including a display panel provided with a first substrate, a second substrate, and liquid crystal, the method comprises: a first irradiation step of irradiating first positions of a first glass plate and a second glass plate with a laser beam having first irradiation energy; a second irradiation step of irradiating second positions of the first glass plate and the second glass plate with the laser beam having second irradiation energy higher than the first irradiation energy; and an etching step of exposing the display panel to an etching solution after the first irradiation step and the second irradiation step, such that the first positions are not cleaved, the second positions are cleaved, and at least a part of an outer periphery of each of the first substrate and the second substrate is formed.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: April 20, 2021
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Kazuhiko Tsuda, Yoshiki Watanabe, Norimichi Shirai
  • Patent number: 10962849
    Abstract: A liquid crystal display device includes a plurality of display panels which are disposed so as to overlap each other, each of the display panels displaying an image. The liquid crystal display device includes a first substrate; a second substrate disposed opposite to the first substrate in a first direction; a first liquid crystal layer disposed between the first substrate and the second substrate; a third substrate disposed opposite to the first substrate in a second direction that is an opposite direction to the first direction; and a second liquid crystal layer disposed between the first substrate and the third substrate.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: March 30, 2021
    Assignees: Panasonic Liquid Crystal Display Co., Ltd., Pasona Knowledge Partner Inc.
    Inventors: Ikuko Mori, Tomohiro Murakoso, Kazuhiko Tsuda
  • Patent number: 10962841
    Abstract: A liquid crystal display device in which a plurality of display panels are disposed so as to overlap each other and which displays an image on each of the plurality of display panels. The liquid crystal display device includes a first display panel; and a second display panel disposed so as to overlap the first display panel. The second display panel includes a first substrate on which a source line, a gate line, a thin film transistor, and an organic insulator are formed, a second substrate disposed opposite to the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate, a first spacer is formed in the first substrate to hold a distance between the first substrate and the second substrate. The first spacer and the organic insulator are made of a positive photosensitive resin.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: March 30, 2021
    Assignees: Panasonic Liquid Crystal Display Co., Ltd., Pasona Knowledge Partner Inc.
    Inventors: Tomohiro Murakoso, Kazuhiko Tsuda, Ikuko Mori
  • Patent number: 10935848
    Abstract: A liquid crystal display device according to a present disclosure comprises: a thin film transistor substrate including a thin film transistor array; a counter substrate opposed to the thin film transistor substrate; and a liquid crystal layer disposed between the thin film transistor substrate and the counter substrate, wherein the thin film transistor substrate includes: an overlapping part that overlaps with the counter substrate in planar view; and a non-overlapping part that includes a terminal portion and does not overlap with the counter substrate in planar view, and an outer shape of the non-overlapping part has a non-rectangular shape in planar view.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: March 2, 2021
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventor: Kazuhiko Tsuda
  • Patent number: 10923056
    Abstract: An array board includes a display area having a non-rectangular shape, TFTs disposed in the display area, a plurality of gate lines disposed in the display area and connected to the TFTs, a non-display area surrounding the display area, unit circuits disposed in the non-display area and connected to the gate lines, and a block connection line. The unit circuits are linearly arranged in the non-display area to form circuit blocks. The circuit blocks in the non-display area form a gate circuit portion in which at least two of the circuit blocks are away from each other in an oblique direction with respect to an arrangement direction of the unit circuits. The block connection line extends across the circuit blocks in the non-display area. The block connection line is connected to the circuit blocks.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: February 16, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takehisa Sakurai, Kazuhiko Tsuda
  • Patent number: 10795222
    Abstract: A display device according to a present disclosure comprises: a first glass substrate including a through-hole; a wiring disposed in a first main surface of the first glass substrate; and a terminal formed in a second main surface of the first glass substrate and electrically connected to the wiring through the through-hole.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: October 6, 2020
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hiroyuki Yabuki, Kazuhiko Tsuda
  • Publication number: 20200257165
    Abstract: A liquid crystal display device includes a first glass substrate, a second glass substrate, a first liquid crystal layer disposed between the first glass substrate and the second glass substrate, a third glass substrate, a fourth glass substrate, a second liquid crystal layer disposed between the third glass substrate and the fourth glass substrate, a first polarizing plate formed on the first glass substrate, a second polarizing plate formed on the third glass substrate, and a bonding layer disposed between the first glass substrate and the third glass substrate. In planar view, the bonding layer is disposed outside the first polarizing plate and the second polarizing plate, a surface on the bonding layer bonds to the first glass substrate, and a surface on the bonding layer bonds to the third glass substrate.
    Type: Application
    Filed: April 27, 2020
    Publication date: August 13, 2020
    Inventors: Yoichi YASUI, Takenori YAGUCHI, Takaaki KITADA, Kazuhiko TSUDA, Takashi KATO, Hidenori KIKUCHI, Naoki TERASAWA, Katsuji TANAKA
  • Patent number: 10718966
    Abstract: A liquid crystal display device comprises: a first display panel including a first liquid crystal cell and a pair of first polarizing plates sandwiching the first liquid crystal cell; a second display panel including a second liquid crystal cell and a pair of second polarizing plates sandwiching the second liquid crystal cell; and a bonding member bonding one of the pair of first polarizing plates of the first display panel and one of the pair of second polarizing plates of the second display panel together. An end of the bonding member is located inside an end of the first polarizing plate and an end of the second polarizing plate.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: July 21, 2020
    Assignees: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD., PASONA KNOWLEDGE PARTNER INC.
    Inventors: Takao Imaoku, Kazuhiko Tsuda, Ikuko Imajo, Yusuke Katagiri
  • Publication number: 20200209668
    Abstract: A liquid crystal display device includes: a first display panel including a first liquid crystal cell; a second display panel including a second liquid crystal cell; and a bonding member that bonds the first and the second display panels together. The bonding member is made of a photocurable resin. In a section in a thickness direction of the first display panel and parallel to either a longitudinal axis direction or a latitudinal axis direction of the first display panel, a relative curing reaction rate at a central representative point of the bonding member is greater than a relative curing reaction rate at an end representative point of the bonding member. A difference between the relative curing reaction rate at the central representative point of the bonding member and the relative curing reaction rate at the end representative point of the bonding member falls within 4%.
    Type: Application
    Filed: December 18, 2019
    Publication date: July 2, 2020
    Inventors: Kazuhiko TSUDA, Takao IMAOKU, Ikuko IMAJO
  • Patent number: 10670912
    Abstract: A liquid crystal display device includes a first glass substrate, a second glass substrate, a first liquid crystal layer disposed between the first glass substrate and the second glass substrate, a third glass substrate, a fourth glass substrate, a second liquid crystal layer disposed between the third glass substrate and the fourth glass substrate, a first polarizing plate formed on the first glass substrate, a second polarizing plate formed on the third glass substrate, and a bonding layer disposed between the first glass substrate and the third glass substrate. In planar view, the bonding layer is disposed outside the first polarizing plate and the second polarizing plate, a surface on the bonding layer bonds to the first glass substrate, and a surface on the bonding layer bonds to the third glass substrate.
    Type: Grant
    Filed: June 10, 2019
    Date of Patent: June 2, 2020
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yoichi Yasui, Takenori Yaguchi, Takaaki Kitada, Kazuhiko Tsuda, Takashi Kato, Hidenori Kikuchi, Naoki Terasawa, Katsuji Tanaka
  • Patent number: 10598983
    Abstract: A liquid crystal display device includes: a first polarizing plate, a first liquid crystal cell, a second polarizing plate, a third polarizing plate, a second liquid crystal cell, and a fourth polarizing plate, which are arranged from a front side to a back side in this order. P1, P2, P3, P4 represent degrees of polarization of the first polarizing plate, the second polarizing plate, the third polarizing plate, and the fourth polarizing plate, respectively, one of a relational expression of P1>P2, P3, P4, a relational expressions of P4>P1, P2, P3, and a relational expression of P1, P4>P2, P3 is satisfied.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: March 24, 2020
    Assignee: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Yoichi Yasui, Katsuhiro Kikuchi, Kazuhiko Tsuda
  • Patent number: 10598994
    Abstract: A liquid crystal display device includes: a first display panel; and a second display panel opposing to the first display panel. Each of the first and second display panel includes a plurality of source lines, a plurality of gate lines, a plurality of thin film transistors, and a plurality of pixel electrodes electrically connected to corresponding one of the thin film transistors. In a second display panel, at least two thin film transistors are electrically connected to a same second source line and a same second gate line.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: March 24, 2020
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Ikuko Mori, Teruhisa Nakagawa, Kazuhiko Tsuda, Katsuji Tanaka
  • Publication number: 20200089030
    Abstract: A method for manufacturing a liquid crystal display device including a display panel provided with a first substrate, a second substrate, and liquid crystal, the method comprises: a first irradiation step of irradiating first positions of a first glass plate and a second glass plate with a laser beam having first irradiation energy; a second irradiation step of irradiating second positions of the first glass plate and the second glass plate with the laser beam having second irradiation energy higher than the first irradiation energy; and an etching step of exposing the display panel to an etching solution after the first irradiation step and the second irradiation step, such that the first positions are not cleaved, the second positions are cleaved, and at least a part of an outer periphery of each of the first substrate and the second substrate is formed.
    Type: Application
    Filed: September 10, 2019
    Publication date: March 19, 2020
    Inventors: Kazuhiko TSUDA, Yoshiki WATANABE, Norimichi SHIRAI
  • Patent number: 10591762
    Abstract: A method for manufacturing a liquid crystal display device including a first substrate and a second substrate, each of the first substrate and the second substrate having flexibility, the method includes a first step of manufacturing a display panel having flexibility, the display panel including the first substrate and the second substrate, a second step of bending the display panel such that a display of the display panel is constructed with a first flat surface and a second flat surface and a curved surface disposed between the first flat surface and the second flat surface, the curved surface having a predetermined curvature radius; and a third step of fixing the display panel subjected to the second step to a cover member keeping the curved surface in a given shape.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: March 17, 2020
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Tomoharu Notoshi, Kazuhiko Tsuda
  • Publication number: 20190384081
    Abstract: A liquid crystal display device includes: a first display panel; and a second display panel opposing to the first display panel. Each of the first and second display panel includes a plurality of source lines, a plurality of gate lines, a plurality of thin film transistors, and a plurality of pixel electrodes electrically connected to corresponding one of the thin film transistors. In a second display panel, at least two thin film transistors are electrically connected to a same second source line and a same second gate line.
    Type: Application
    Filed: August 26, 2019
    Publication date: December 19, 2019
    Inventors: Ikuko MORI, Teruhisa NAKAGAWA, Kazuhiko TSUDA, Katsuji TANAKA
  • Patent number: 10497901
    Abstract: An organic EL display device 1 includes a flexible plastic substrate 10, an organic EL element 4 on the plastic substrate 10, and a sealing film 2 provided on the plastic substrate 10 to cover the organic EL element 4. The sealing film 2 includes a first sealing layer 25 on a surface of the plastic substrate 10, a stress relief layer 26 on a surface of the first sealing layer 25, and a second sealing layer 27 on a surface of the stress relief layer 26. Compressive stress of the first sealing layer 25 is lower than compressive stress of the second sealing layer 27.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: December 3, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Mamoru Ishida, Kazuhiko Tsuda, Yoshifumi Ohta
  • Patent number: 10437119
    Abstract: A liquid crystal display device includes: a first display panel; and a second display panel opposing to the first display panel. Each of the first and second display panel includes a plurality of source lines, a plurality of gate lines, a plurality of thin film transistors, and a plurality of pixel electrodes electrically connected to corresponding one of the thin film transistors. In a second display panel, at least two thin film transistors are electrically connected to a same second source line and a same second gate line.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: October 8, 2019
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Ikuko Mori, Teruhisa Nakagawa, Kazuhiko Tsuda, Katsuji Tanaka
  • Publication number: 20190293999
    Abstract: A liquid crystal display device includes a first glass substrate, a second glass substrate, a first liquid crystal layer disposed between the first glass substrate and the second glass substrate, a third glass substrate, a fourth glass substrate, a second liquid crystal layer disposed between the third glass substrate and the fourth glass substrate, a first polarizing plate formed on the first glass substrate, a second polarizing plate formed on the third glass substrate, and a bonding layer disposed between the first glass substrate and the third glass substrate. In planar view, the bonding layer is disposed outside the first polarizing plate and the second polarizing plate, a surface on the bonding layer bonds to the first glass substrate, and a surface on the bonding layer bonds to the third glass substrate.
    Type: Application
    Filed: June 10, 2019
    Publication date: September 26, 2019
    Inventors: Yoichi YASUI, Takenori YAGUCHI, Takaaki KITADA, Kazuhiko TSUDA, Takashi KATO, Hidenori KIKUCHI, Naoki TERASAWA, Katsuji TANAKA
  • Publication number: 20190278116
    Abstract: A liquid crystal display device according to a present disclosure comprises: a thin film transistor substrate including a thin film transistor array; a counter substrate opposed to the thin film transistor substrate; and a liquid crystal layer disposed between the thin film transistor substrate and the counter substrate, wherein the thin film transistor substrate includes: an overlapping part that overlaps with the counter substrate in planar view; and a non-overlapping part that includes a terminal portion and does not overlap with the counter substrate in planar view, and an outer shape of the non-overlapping part has a non-rectangular shape in planar view.
    Type: Application
    Filed: February 27, 2019
    Publication date: September 12, 2019
    Inventor: Kazuhiko TSUDA