Patents by Inventor Keiji Tago

Keiji Tago 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: 10012863
    Abstract: A liquid crystal display panel for displaying images in an active area includes a first substrate having a pair of first short ends and first long ends. A second substrate faces the first substrate so as to hold a liquid crystal layer therebetween. A first polarization plate is arranged on an outside surface of the first substrate. The first polarization plate has a pair of second short ends longer than the first short ends, a pair of second long ends, and a first absorption axis. The angle a1 made by the first absorption axis with respect to the second short ends is smaller than an angle b1 made by the first absorption axis with respect to the second long ends. A second polarization plate is arranged on an outside surface of the second substrate and has a second absorption axis.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: July 3, 2018
    Assignee: Japan Display Inc.
    Inventors: Kayoko Miyazaki, Tatsuaki Kuji, Keiji Tago
  • Publication number: 20180120617
    Abstract: According to one embodiment, a liquid crystal display device includes an array substrate, a counter-substrate, a negative liquid crystal layer including liquid crystal molecules, a retardation film attached to a surface of the array substrate, a first polarizer attached to the retardation film and having a first absorption axis, a second polarizer attached to a surface of the counter-substrate, and having a second absorption axis which is parallel to a direction of initial alignment of the liquid crystal molecules and perpendicular to the first absorption axis, a cover member located opposite to the second polarizer, and ultraviolet curing resin which bonds the second polarizer and the cover member to each other.
    Type: Application
    Filed: December 19, 2017
    Publication date: May 3, 2018
    Applicant: Japan Display Inc.
    Inventor: Keiji TAGO
  • Patent number: 9927663
    Abstract: A liquid crystal display device includes a first substrate including a first pixel electrode, a second pixel electrode, and a third pixel electrode, a second substrate including a first color filter opposed to the first pixel electrode, a second color filter opposed to the second pixel electrode, and a third color filter opposed to the third pixel electrode, and a liquid crystal layer held between the first substrate and the second substrate, a first interval along the first direction between the first pixel electrode and the second pixel electrode being smaller than a second interval along the first direction between the second pixel electrode and the third pixel electrode.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: March 27, 2018
    Assignee: Japan Display Inc.
    Inventors: Kayoko Miyazaki, Keiji Tago
  • Patent number: 9880428
    Abstract: According to one embodiment, a display device includes a first substrate including a first pixel electrode disposed in a red color pixel, a second pixel electrode disposed in a green color pixel, and a third pixel electrode disposed in a blue color pixel, a second substrate including a common electrode having a first slit opposed to the first pixel electrode, a second slit opposed to the second pixel electrode, and a third slit opposed to the third pixel electrode, and a liquid crystal layer held between the first substrate and the second substrate, wherein at least one of an area and an area ratio of the third slit is greater than that of the first slit and the second slit.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: January 30, 2018
    Assignee: Japan Display Inc.
    Inventors: Keiji Tago, Kayoko Miyazaki, Ayumi Mori
  • Patent number: 9874781
    Abstract: According to one embodiment, a liquid crystal display device includes an array substrate, a counter-substrate, a negative liquid crystal layer including liquid crystal molecules, a retardation film attached to a surface of the array substrate, a first polarizer attached to the retardation film and having a first absorption axis, a second polarizer attached to a surface of the counter-substrate, and having a second absorption axis which is parallel to a direction of initial alignment of the liquid crystal molecules and perpendicular to the first absorption axis, a cover member located opposite to the second polarizer, and ultraviolet curing resin which bonds the second polarizer and the cover member to each other.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: January 23, 2018
    Assignee: Japan Display Inc.
    Inventor: Keiji Tago
  • Publication number: 20170299926
    Abstract: A display device includes a first color pixel, a second color pixel neighboring the first color pixel in a first direction, a third color pixel neighboring the second color pixel in the first direction, a fourth color pixel neighboring the first color pixel in a second direction, a fifth color pixel neighboring the second color pixel in the second direction, and a sixth color pixel neighboring the third color pixel in the second direction, wherein each of the first color pixel, the second color pixel, the fourth color pixel and the fifth color pixel has a first long-side length, the third color pixel has a second long-side length which is greater than the first long-side length, and the sixth color pixel has a third long-side length which is less than the first long-side length.
    Type: Application
    Filed: June 29, 2017
    Publication date: October 19, 2017
    Applicant: Japan Display Inc.
    Inventors: Arihiro TAKEDA, Keiji TAGO, Kayoko MIYAZAKI, Ayumi MORI
  • Publication number: 20170285385
    Abstract: A liquid crystal display panel for displaying images in an active area includes a first substrate having a pair of first short ends and first long ends. A second substrate faces the first substrate so as to hold a liquid crystal layer therebetween. A first polarization plate is arranged on an outside surface of the first substrate. The first polarization plate has a pair of second short ends longer than the first short ends, a pair of second long ends, and a first absorption axis. The angle a1 made by the first absorption axis with respect to the second short ends is smaller than an angle b1 made by the first absorption axis with respect to the second long ends. A second polarization plate is arranged on an outside surface of the second substrate and has a second absorption axis.
    Type: Application
    Filed: June 15, 2017
    Publication date: October 5, 2017
    Applicant: Japan Display Inc.
    Inventors: Kayoko MIYAZAKI, Tatsuaki KUJI, Keiji TAGO
  • Patent number: 9733527
    Abstract: A display device includes a first color pixel, a second color pixel neighboring the first color pixel in a first direction, a third color pixel neighboring the second color pixel in the first direction, a fourth color pixel neighboring the first color pixel in a second direction, a fifth color pixel neighboring the second color pixel in the second direction, and a sixth color pixel neighboring the third color pixel in the second direction, wherein each of the first color pixel, the second color pixel, the fourth color pixel and the fifth color pixel has a first long-side length, the third color pixel has a second long-side length which is greater than the first long-side length, and the sixth color pixel has a third long-side length which is less than the first long-side length.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: August 15, 2017
    Assignee: Japan Display Inc.
    Inventors: Arihiro Takeda, Keiji Tago, Kayoko Miyazaki, Ayumi Mori
  • Patent number: 9709845
    Abstract: A liquid crystal display panel for displaying images in an active area includes a first substrate having a pair of first short ends and first long ends. A second substrate faces the first substrate so as to hold a liquid crystal layer therebetween. A first polarization plate is arranged on an outside surface of the first substrate. The first polarization plate has a pair of second short ends longer than the first short ends, a pair of second long ends, and a first absorption axis. The angle a1 made by the first absorption axis with respect to the second short ends is smaller than an angle b1 made by the first absorption axis with respect to the second long ends. A second polarization plate is arranged on an outside surface of the second substrate and has a second absorption axis.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: July 18, 2017
    Assignee: Japan Display Inc.
    Inventors: Kayoko Miyazaki, Tatsuaki Kuji, Keiji Tago
  • Patent number: 9684200
    Abstract: A liquid crystal display device includes a first substrate, a second substrate including an insulative substrate and a color filter layer formed on that side of the insulative substrate, which is opposed to the first substrate, the color filter layer including a first color filter of red, a third color filter of blue which is spaced apart from the first color filter, a fifth color filter of red which is spaced apart from the third color filter, a second color filter which is located between the first color filter and the third color filter and has a color which is different from red and blue, and a fourth color filter which is located between the third color filter and the fifth color filter and has a color which is different from red and blue, and a liquid crystal layer.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: June 20, 2017
    Assignee: Japan Display Inc.
    Inventors: Tomoko Kozuka, Keiji Tago, Hirokazu Morimoto
  • Publication number: 20170123261
    Abstract: According to one embodiment, a display device includes a display panel configured to hold a liquid crystal layer between a first substrate and a second substrate, a cover member positioned at a side of the second substrate of the display panel, a first optical element positioned at an outer surface side of the first substrate, and a second optical element positioned between the second substrate and the cover member, bonded to an inner surface of the cover member but not bonded to the second substrate.
    Type: Application
    Filed: January 11, 2017
    Publication date: May 4, 2017
    Applicant: Japan Display Inc.
    Inventors: Kayoko MIYAZAKI, Keiji TAGO, Hirokazu MORIMOTO
  • Patent number: 9581857
    Abstract: According to one embodiment, a display device includes a display panel configured to hold a liquid crystal layer between a first substrate and a second substrate, a cover member positioned at a side of the second substrate of the display panel, a first optical element positioned at an outer surface side of the first substrate, and a second optical element positioned between the second substrate and the cover member, bonded to an inner surface of the cover member but not bonded to the second substrate.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: February 28, 2017
    Assignee: Japan Display Inc.
    Inventors: Kayoko Miyazaki, Keiji Tago, Hirokazu Morimoto
  • Publication number: 20160085115
    Abstract: A liquid crystal display panel for displaying images in an active area includes a first substrate having a pair of first short ends and first long ends. A second substrate faces the first substrate so as to hold a liquid crystal layer therebetween. A first polarization plate is arranged on an outside surface of the first substrate. The first polarization plate has a pair of second short ends longer than the first short ends, a pair of second long ends, and a first absorption axis. The angle a1 made by the first absorption axis with respect to the second short ends is smaller than an angle b1 made by the first absorption axis with respect to the second long ends. A second polarization plate is arranged on an outside surface of the second substrate and has a second absorption axis.
    Type: Application
    Filed: December 2, 2015
    Publication date: March 24, 2016
    Applicant: Japan Display Inc.
    Inventors: Kayoko MIYAZAKI, Tatsuaki KUJI, Keiji TAGO
  • Patent number: 9280016
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate including a transmissive pixel electrode disposed in a transmissive display area, and a reflective pixel electrode with a planar plate shape which is disposed in a reflective display area, a second substrate including a common electrode, a liquid crystal layer being configured to have a less thickness in the reflective display area than in the transmissive display area, to impart a phase difference of ¼ wavelength to light passing at an OFF time in the reflective display area, and to impart no phase difference to light passing at an ON time in the reflective display area, and a retardation plate disposed between a second polarizer and the second substrate in the reflective display area.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: March 8, 2016
    Assignee: Japan Display Inc.
    Inventors: Keiji Tago, Hirokazu Morimoto
  • Publication number: 20160062194
    Abstract: According to one embodiment, a liquid crystal display device includes an array substrate, a counter-substrate, a negative liquid crystal layer including liquid crystal molecules, a retardation film attached to a surface of the array substrate, a first polarizer attached to the retardation film and having a first absorption axis, a second polarizer attached to a surface of the counter-substrate, and having a second absorption axis which is parallel to a direction of initial alignment of the liquid crystal molecules and perpendicular to the first absorption axis, a cover member located opposite to the second polarizer, and ultraviolet curing resin which bonds the second polarizer and the cover member to each other.
    Type: Application
    Filed: August 28, 2015
    Publication date: March 3, 2016
    Applicant: Japan Display Inc.
    Inventor: Keiji TAGO
  • Patent number: 9235094
    Abstract: In one embodiment, a liquid crystal display device comprises a pixel electrode including a first main electrode disposed between a first line and a second line and extending like a belt in a first extending direction. A first counter electrode includes a second main electrode extending like a belt in the first extending direction, a second counter electrode having a third main electrode extending like a belt in the first extending direction. The second and third main electrodes are disposed on both sides of the first main electrode, and an initial alignment direction of the liquid crystal molecules is parallel with a direction passing through an interstice between the first end side of the first main electrode and the second line, and through an interstice between the second end side of the first main electrode and the first line.
    Type: Grant
    Filed: October 6, 2014
    Date of Patent: January 12, 2016
    Assignee: JAPAN DISPLAY INC.
    Inventors: Yusuke Morita, Jin Hirosawa, Arihiro Takeda, Nobuko Fukuoka, Keiji Tago, Kazuya Daishi
  • Patent number: 9229271
    Abstract: A liquid crystal display panel for displaying images in an active area includes a first substrate having a pair of first short ends and first long ends. A second substrate faces the first substrate so as to hold a liquid crystal layer therebetween. A first polarization plate is arranged on an outside surface of the first substrate. The first polarization plate has a pair of second short ends longer than the first short ends, a pair of second long ends, and a first absorption axis. The angle a1 made by the first absorption axis with respect to the second short ends is smaller than an angle b1 made by the first absorption axis with respect to the second long ends. A second polarization plate is arranged on an outside surface of the second substrate and has a second absorption axis.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: January 5, 2016
    Assignee: Japan Display Inc.
    Inventors: Kayoko Miyazaki, Tatsuaki Kuji, Keiji Tago
  • Publication number: 20150362804
    Abstract: A liquid crystal display device includes a first substrate including a first pixel electrode, a second pixel electrode, and a third pixel electrode, a second substrate including a first color filter opposed to the first pixel electrode, a second color filter opposed to the second pixel electrode, and a third color filter opposed to the third pixel electrode, and a liquid crystal layer held between the first substrate and the second substrate, a first interval along the first direction between the first pixel electrode and the second pixel electrode being smaller than a second interval along the first direction between the second pixel electrode and the third pixel electrode.
    Type: Application
    Filed: June 11, 2015
    Publication date: December 17, 2015
    Applicant: Japan Display Inc.
    Inventors: Kayoko Miyazaki, Keiji Tago
  • Patent number: 9182639
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer, pixels a first polarizer having a first absorption axis, a second polarizer having a second absorption axis, a first retardation film having a first slow axis, and a second retardation film having a second slow axis. Each of the pixels includes a primary pixel electrode and a pair of primary common electrodes. Re1<Re2 holds, Re1+Re2=150±50 nm holds for light having a wavelength of 550 nm, and Rth1+Rth2=?10±50 nm holds for the light having the wavelength of 550 nm.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: November 10, 2015
    Assignee: JAPAN DISPLAY INC.
    Inventors: Kayoko Miyazaki, Keiji Tago
  • Publication number: 20150309364
    Abstract: A liquid crystal display panel for displaying images in an active area includes a first substrate having a pair of first short ends and first long ends. A second substrate faces the first substrate so as to hold a liquid crystal layer therebetween. A first polarization plate is arranged on an outside surface of the first substrate. The first polarization plate has a pair of second short ends longer than the first short ends, a pair of second long ends, and a first absorption axis. The angle a1 made by the first absorption axis with respect to the second short ends is smaller than an angle b1 made by the first absorption axis with respect to the second long ends. A second polarization plate is arranged on an outside surface of the second substrate and has a second absorption axis.
    Type: Application
    Filed: July 9, 2015
    Publication date: October 29, 2015
    Applicant: Japan Display Inc.
    Inventors: Kayoko MIYAZAKI, Tatsuaki Kuji, Keiji Tago