Patents by Inventor Hidemasa Yamaguchi

Hidemasa Yamaguchi 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: 20240085745
    Abstract: A display device is provided and includes first and second substrates; a liquid crystal layer filled between the first and second substrates; a counter electrode pattern formed on the first substrate; scanning lines extending in a first direction; signal lines; and a first pixel electrode pattern and a second pixel electrode pattern formed on the first substrate, wherein the first pixel electrode pattern and the second pixel electrode pattern are located in line symmetry with respect to a first scanning line of the scanning lines.
    Type: Application
    Filed: November 14, 2023
    Publication date: March 14, 2024
    Inventors: Yoshihiro SAKURAI, Hironao TANAKA, Hidemasa YAMAGUCHI
  • Patent number: 11921389
    Abstract: A display device includes a display section in which a plurality of pixels are arrayed in a matrix, a plurality of scan lines which select pixels, a plurality of signal lines which supply image signals to the selected pixels, and color filters that are arranged so as to correspond to color displays of the pixels. In the device, the display section includes an effective pixel portion and a frame portion that surrounds the effective pixel portion, and the frame portion and a wiring circuit of the effective pixel portion are covered with light-shielding layers, the light-shielding layers being separated from each other at a certain separation location in the display section, and a plurality of color filters having different colors are arranged by being stacked at the separation location.
    Type: Grant
    Filed: October 27, 2022
    Date of Patent: March 5, 2024
    Assignee: Japan Display Inc.
    Inventors: Kenta Seki, Seiji Uejima, Ryo Yamaoka, Hidemasa Yamaguchi
  • Patent number: 11852928
    Abstract: A display device is provided and includes first and second substrates; a liquid crystal layer filled between the first and second substrates; a counter electrode pattern formed on the first substrate; scanning lines extending in a first direction; signal lines; and a first pixel electrode pattern and a second pixel electrode pattern formed on the first substrate, wherein the first pixel electrode pattern and the second pixel electrode pattern are located in line symmetry with respect to a first scanning line of the scanning lines.
    Type: Grant
    Filed: January 9, 2023
    Date of Patent: December 26, 2023
    Assignee: Japan Display Inc.
    Inventors: Yoshihiro Sakurai, Hironao Tanaka, Hidemasa Yamaguchi
  • Publication number: 20230296943
    Abstract: A liquid crystal display device is provided and includes a substrate; a liquid crystal layer; pixels each having a pixel electrode between the liquid crystal layer and the substrate, and a thin film transistor connected to the pixel electrode; a counter electrode over the pixels; scanning lines each having a longitudinal direction along a first direction; signal lines each having a longitudinal direction along a second direction; and a first protrusion having a convex shape, the first protrusion being a part of the pixel electrode, protruding in one of the first direction and the second direction, and not overlapping the thin film transistor.
    Type: Application
    Filed: May 23, 2023
    Publication date: September 21, 2023
    Inventors: Yoshihiro SAKURAI, Hironao TANAKA, Hidemasa YAMAGUCHI
  • Patent number: 11693281
    Abstract: A liquid crystal display device including first and second substrates; a liquid crystal layer arranged between the first and second substrates; a plurality of pixel regions each surrounded by a signal line and a scanning line; a counter electrode arranged on the first substrate; and a pixel electrode arranged on the first substrate, the pixel electrode including a plurality of electrode branches, a plurality of slits formed between the electrode branches, and a protrusion protruding in a first direction in which the scanning line extends, wherein at least one of the slits extends in a second direction in which the signal line extends.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: July 4, 2023
    Assignee: Japan Display Inc.
    Inventors: Yoshihiro Sakurai, Hironao Tanaka, Hidemasa Yamaguchi
  • Publication number: 20230161204
    Abstract: A display device is provided and includes first and second substrates; a liquid crystal layer filled between the first and second substrates; a counter electrode pattern formed on the first substrate; scanning lines extending in a first direction; signal lines; and a first pixel electrode pattern and a second pixel electrode pattern formed on the first substrate, wherein the first pixel electrode pattern and the second pixel electrode pattern are located in line symmetry with respect to a first scanning line of the scanning lines.
    Type: Application
    Filed: January 9, 2023
    Publication date: May 25, 2023
    Inventors: Yoshihiro SAKURAI, Hironao TANAKA, Hidemasa YAMAGUCHI
  • Patent number: 11635662
    Abstract: A display device includes a display section in which a plurality of pixels are arrayed in a matrix, a plurality of scan lines which select pixels, a plurality of signal lines which supply image signals to the selected pixels, and color filters that are arranged so as to correspond to color displays of the pixels. In the device, the display section includes an effective pixel portion and a frame portion that surrounds the effective pixel portion, and the frame portion and a wiring circuit of the effective pixel portion are covered with light-shielding layers, the light-shielding layers being separated from each other at a certain separation location in the display section, and a plurality of color filters having different colors are arranged by being stacked at the separation location.
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: April 25, 2023
    Assignee: Japan Display Inc.
    Inventors: Kenta Seki, Seiji Uejima, Ryo Yamaoka, Hidemasa Yamaguchi
  • Publication number: 20230049169
    Abstract: A display device includes a display section in which a plurality of pixels are arrayed in a matrix, a plurality of scan lines which select pixels, a plurality of signal lines which supply image signals to the selected pixels, and color filters that are arranged so as to correspond to color displays of the pixels. In the device, the display section includes an effective pixel portion and a frame portion that surrounds the effective pixel portion, and the frame portion and a wiring circuit of the effective pixel portion are covered with light-shielding layers, the light-shielding layers being separated from each other at a certain separation location in the display section, and a plurality of color filters having different colors are arranged by being stacked at the separation location.
    Type: Application
    Filed: October 27, 2022
    Publication date: February 16, 2023
    Inventors: Kenta Seki, Seiji Uejima, Ryo Yamaoka, Hidemasa Yamaguchi
  • Patent number: 11550191
    Abstract: A display device is provided and includes first and second substrates; a liquid crystal layer filled between the first and second substrates; a counter electrode pattern formed on the first substrate; scanning lines extending in a first direction; signal lines; and a first pixel electrode pattern and a second pixel electrode pattern formed on the first substrate, wherein the first pixel electrode pattern and the second pixel electrode pattern are located in line symmetry with respect to a first scanning line of the scanning lines.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: January 10, 2023
    Assignee: Japan Display Inc.
    Inventors: Yoshihiro Sakurai, Hironao Tanaka, Hidemasa Yamaguchi
  • Publication number: 20220158036
    Abstract: According to one embodiment, a display device includes a substrate, an anode electrode, a light emitting element and a reflector plate. The anode electrode is arranged on the substrate. The light emitting element is mounted on the anode electrode. The reflector plate is arranged under the anode electrode, and is arranged to overlap a region where the light emitting element is mounted, in planar view. An anode terminal is arranged on a bottom part and electrically connected to the anode electrode. A cathode terminal is arranged across an entire upper surface on a side opposite to the anode terminal. The anode electrode being smaller than the cathode terminal in a position overlapping the region where the light emitting element is mounted in planar view.
    Type: Application
    Filed: January 31, 2022
    Publication date: May 19, 2022
    Inventors: Hidemasa YAMAGUCHI, Masanobu IKEDA
  • Publication number: 20220005865
    Abstract: A display device includes a substrate; a plurality of pixels provided on the substrate; and a plurality of inorganic light emitting elements provided on each of the pixels. The inorganic light emitting elements each include a semiconductor substrate having a first face facing the substrate and a second face provided in a convex shape on a side opposite from the first face; and a plurality of semiconductor nanowires provided on the first face, the semiconductor nanowires extending in a direction perpendicular to the first face.
    Type: Application
    Filed: September 22, 2021
    Publication date: January 6, 2022
    Inventors: Masanobu IKEDA, Hidemasa YAMAGUCHI
  • Publication number: 20210382362
    Abstract: A display device includes a display section in which a plurality of pixels are arrayed in a matrix, a plurality of scan lines which select pixels, a plurality of signal lines which supply image signals to the selected pixels, and color filters that are arranged so as to correspond to color displays of the pixels. In the device, the display section includes an effective pixel portion and a frame portion that surrounds the effective pixel portion, and the frame portion and a wiring circuit of the effective pixel portion are covered with light-shielding layers, the light-shielding layers being separated from each other at a certain separation location in the display section, and a plurality of color filters having different colors are arranged by being stacked at the separation location.
    Type: Application
    Filed: August 23, 2021
    Publication date: December 9, 2021
    Inventors: Kenta Seki, Seiji Uejima, Ryo Yamaoka, Hidemasa Yamaguchi
  • Patent number: 11156886
    Abstract: A display device includes a display section in which a plurality of pixels are arrayed in a matrix, a plurality of scan lines which select pixels, a plurality of signal lines which supply image signals to the selected pixels, and color filters that are arranged so as to correspond to color displays of the pixels. In the device, the display section includes an effective pixel portion and a frame portion that surrounds the effective pixel portion, and the frame portion and a wiring circuit of the effective pixel portion are covered with light-shielding layers, the light-shielding layers being separated from each other at a certain separation location in the display section, and a plurality of color filters having different colors are arranged by being stacked at the separation location.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: October 26, 2021
    Assignee: Japan Display Inc.
    Inventors: Kenta Seki, Seiji Uejima, Ryo Yamaoka, Hidemasa Yamaguchi
  • Patent number: 10896653
    Abstract: A display device includes: pixels corresponding to respective colors arranged in matrix, wherein each pixel has a pixel circuit portion in which a circuit for display driving of the pixel is arranged and a pixel opening to be an area obtaining effective display light, the pixel openings of the pixels corresponding to at least one color have an area different from areas of the pixel openings of pixels corresponding to other colors.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: January 19, 2021
    Assignee: Japan Display Inc.
    Inventors: Hidemasa Yamaguchi, Hironao Tanaka, Daisuke Ito
  • Publication number: 20200341339
    Abstract: A display device includes a display section in which a plurality of pixels are arrayed in a matrix, a plurality of scan lines which select pixels, a plurality of signal lines which supply image signals to the selected pixels, and color filters that are arranged so as to correspond to color displays of the pixels. In the device, the display section includes an effective pixel portion and a frame portion that surrounds the effective pixel portion, and the frame portion and a wiring circuit of the effective pixel portion are covered with light-shielding layers, the light-shielding layers being separated from each other at a certain separation location in the display section, and a plurality of color filters having different colors are arranged by being stacked at the separation location.
    Type: Application
    Filed: July 13, 2020
    Publication date: October 29, 2020
    Inventors: Kenta Seki, Seiji Uejima, Ryo Yamaoka, Hidemasa Yamaguchi
  • Patent number: 10573264
    Abstract: According to one embodiment, a display device comprises first and second substrates and a liquid crystal layer. The first substrate includes a pixel electrode and a common electrode. The second substrate is opposed to the first substrate. The liquid crystal layer is between the first substrate and the second substrate. A frame frequency for rewriting a voltage of the pixel electrode is 80 Hz or more. A liquid crystal material contained in the liquid crystal layer has negative dielectric anisotropy. Product ?nd of a gap d between the first substrate and the second substrate and refractive anisotropy ?n of the liquid crystal material is less than 0.33 ?m. The gap d is more than 2 ?m and less than 3 ?m.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: February 25, 2020
    Assignee: Japan Display Inc.
    Inventors: Takenori Hirota, Jin Hirosawa, Hidemasa Yamaguchi, Yasuhiro Takahashi
  • Publication number: 20200026132
    Abstract: A display device is provided and includes first and second substrates; a liquid crystal layer filled between the first and second substrates; a counter electrode pattern formed on the first substrate; scanning lines extending in a first direction; signal lines; and a first pixel electrode pattern and a second pixel electrode pattern formed on the first substrate, wherein the first pixel electrode pattern and the second pixel electrode pattern are located in line symmetry with respect to a first scanning line of the scanning lines.
    Type: Application
    Filed: September 27, 2019
    Publication date: January 23, 2020
    Inventors: Yoshihiro SAKURAI, Hironao TANAKA, Hidemasa YAMAGUCHI
  • Patent number: 10527891
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate, a second substrate, and a liquid crystal layer. The first substrate includes a first line, a second line, a switching element, a common electrode, an insulating film disposed on the common electrode, a pixel electrode connected with the switching element and opposed to the common electrode with the insulating film interposed therebetween, and a first alignment film covering the pixel electrode. The second substrate includes a second alignment film. And the pixel electrode includes one main pixel electrode extending in a belt shape in a pixel area defined by the first line and the second line.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: January 7, 2020
    Assignee: Japan Display Inc.
    Inventors: Seiji Uejima, Hidemasa Yamaguchi, Yoshitaka Ozeki, Takeyuki Tsuruma, Kenta Seki, Toshiaki Fukushima
  • Patent number: 10520779
    Abstract: In order to increase the transmittance around a pixel and to increase the brightness of the screen in an IPS mode liquid crystal display device, a pixel electrode with a slit is formed on a common electrode through an interlayer insulating film. An opening is formed in the common electrode on the outside of the end portion of the pixel electrode as seen in a plane view. Because of the presence of the opening, the electric field lines from the end portion of the pixel electrode reach the layer above the liquid crystal layer and reach further away from the end portion of the pixel electrode, so that it is possible to increase the control ability to the liquid crystal around the pixel. As a result, the pixel transmittance can be increased as a whole and the brightness of the screen can be increased.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: December 31, 2019
    Assignee: Japan Display Inc.
    Inventors: Takeyuki Tsuruma, Hidemasa Yamaguchi
  • Publication number: 20190310526
    Abstract: A liquid crystal display device including first and second substrates; a liquid crystal layer arranged between the first and second substrates; a plurality of pixel regions each surrounded by a signal line and a scanning line; a counter electrode arranged on the first substrate; and a pixel electrode arranged on the first substrate, the pixel electrode including a plurality of electrode branches, a plurality of slits formed between the electrode branches, and a protrusion protruding in a first direction in which the scanning line extends, wherein at least one of the slits extends in a second direction in which the signal line extends.
    Type: Application
    Filed: June 24, 2019
    Publication date: October 10, 2019
    Inventors: Yoshihiro SAKURAI, Hironao TANAKA, Hidemasa YAMAGUCHI