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).

  • Display device
    Patent number: 9733528
    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: August 4, 2015
    Date of Patent: August 15, 2017
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • LIQUID CRYSTAL DISPLAY DEVICE
    Publication number: 20170227822
    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: Application
    Filed: February 8, 2017
    Publication date: August 10, 2017
    Applicant: Japan Display Inc.
    Inventor: Toshiharu MATSUSHIMA
  • Liquid-crystal display device and electronic apparatus
    Patent number: 9728146
    Abstract: According to an aspect, a liquid-crystal display device includes: a liquid crystal layer including a pixel; a driving circuit unit for applying a driving voltage to the pixel; a status detection unit that detects a response speed of the liquid crystal layer; and a control unit that controls a gradation of the pixel by controlling the driving voltage. The control unit switches between a first mode and a second mode based on a detection result from the status detection unit. In the first mode, the control unit uses each of a predetermined number of voltage values from a minimum voltage value to a maximum voltage as a voltage value of the driving voltage corresponding to a gradation value. In the second mode, the control unit uses part of the predetermined number of voltage values as a voltage value of the driving voltage for overdrive.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: August 8, 2017
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Display device and electronic apparatus
    Patent number: 9696599
    Abstract: According to an aspect, a display device has a first electrode, a second electrode and liquid crystal layer. When a voltage is not applied to the first and second electrodes, the major axes of the liquid crystal molecules are oriented in a third direction. When a voltage is applied between the first and second electrodes, the major axes are oriented so as to rise in a direction perpendicular to a first substrate while rotating clockwise in a vicinity of one of long sides of comb tooth portion that face each other and counterclockwise in a vicinity of the other of the long sides. An angle between an electrode base-side portion of a long side of each comb tooth portions and the third direction is larger than an angle between a distal end-side portion of the long side of each comb tooth portions and the third direction.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: July 4, 2017
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Toshiharu Matsushima
  • Display device and electronic apparatus
    Patent number: 9671245
    Abstract: According to an aspect, a display device includes a display unit that includes a dielectric material between two substrates that face each other and a plurality of pixel circuits that apply an electric field to the dielectric material according to an image input gradation for each of a plurality of pixels arranged in a matrix, and displays an image using the plurality of pixels; a capacitance detection unit that outputs a detection signal of a magnitude corresponding to a value of capacitance of the dielectric material; and a control device determines, on the basis of the detection signal from the capacitance detection unit, that the display is normal when a correlation value of the capacitance to the image input gradation is in a predetermined correlation.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: June 6, 2017
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Liquid crystal display device
    Patent number: 9664962
    Abstract: A pixel electrode formed into a slit structure with striped electrodes opposed to each other for a zero rubbing angle can provide fast response since rotational directions of the liquid crystals become opposite at both sides of the slit in the striped electrodes. The electrode structure, however, poses a problem of low transmittance. Provided is a liquid crystal display device of IPS-Pro scheme including a pixel electrode with one pair of striped electrodes. The first striped electrode includes a short electrode section and long electrode sections, and the second striped electrode also includes a short electrode section and long electrode sections. The long electrode sections of the first striped electrode are disposed adjacently to those of the second striped electrode. Liquid crystals are aligned in a lengthwise direction of the striped electrodes.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: May 30, 2017
    Assignee: Japan Display Inc.
    Inventors: Mika Oiwa, Shinichiro Oka, Toshiharu Matsushima
  • LIQUID-CRYSTAL DISPLAY DEVICE AND ELECTRONIC APPARATUS
    Publication number: 20170131600
    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 23, 2017
    Publication date: May 11, 2017
    Inventor: Toshiharu MATSUSHIMA
  • LIQUID CRYSTAL DISPLAY DEVICE
    Publication number: 20170115535
    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: Application
    Filed: October 11, 2016
    Publication date: April 27, 2017
    Inventors: Toshiharu Matsushima, Daichi Suzuki
  • LIQUID CRYSTAL DISPLAY DEVICE
    Publication number: 20170102592
    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: Application
    Filed: December 22, 2016
    Publication date: April 13, 2017
    Inventor: Toshiharu MATSUSHIMA
  • LIQUID CRYSTAL DISPLAY DEVICE AND ELECTRONIC APPARATUS
    Publication number: 20170075177
    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: Application
    Filed: November 23, 2016
    Publication date: March 16, 2017
    Inventors: Masaya Tamaki, Toshiharu Matsushima
  • Liquid-crystal display device and electronic apparatus
    Patent number: 9581868
    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: Grant
    Filed: December 9, 2014
    Date of Patent: February 28, 2017
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Liquid crystal display device and electronic apparatus
    Patent number: 9575384
    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: May 11, 2015
    Date of Patent: February 21, 2017
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Liquid crystal display device and electronic apparatus
    Patent number: 9529238
    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: March 26, 2014
    Date of Patent: December 27, 2016
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Toshiharu Matsushima
  • Liquid crystal display device having a plurality of comb-shaped portions protruding from an electrode base portion and electronic apparatus
    Patent number: 9513516
    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: 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 of the comb-shaped portions is configured such that a width thereof at a protrusion start position of the electrode base portion is smaller than a number obtained by multiplying an array pitch of adjacent comb-shaped portions by 0.5.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: December 6, 2016
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • LIQUID CRYSTAL DISPLAY DEVICE
    Publication number: 20160299390
    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: June 20, 2016
    Publication date: October 13, 2016
    Inventor: Toshiharu Matsushima
  • LIQUID CRYSTAL DEVICE AND ELECTRONIC APPARATUS
    Publication number: 20160202574
    Abstract: A liquid crystal device includes a pair of substrates composed of an element substrate and a counter substrate and a liquid crystal layer that is held between the pair of substrates. In the liquid crystal device, a data line and a scanning line are provided on the element substrate in a manner to be orthogonal to each other, a plurality of pixels including a switching element are arranged in matrix, a first electrode and a second electrode are provided on the element substrate, an image signal potential is supplied to the first electrode via the switching element, a common potential is supplied to the second electrode, the second electrode includes a plurality of openings, and a width, in an alignment direction of the plurality of openings, of the opening positioned on an outermost side in the alignment direction is smaller than a width of the rest of the openings.
    Type: Application
    Filed: March 23, 2016
    Publication date: July 14, 2016
    Inventor: TOSHIHARU MATSUSHIMA
  • Liquid-crystal display device and electronic apparatus
    Patent number: 9390668
    Abstract: According to an aspect, a liquid-crystal display device includes: a liquid crystal layer; and a control unit that controls a display operation. The control unit performs a first display control mode when a response speed of the liquid crystal layer is equal to or higher than a predetermined speed and performs a second display control mode when the response speed of the liquid crystal layer is lower than the predetermined speed. In the first display control mode, the control unit executes a display control at a first frame rate with which a number of frames per unit time is equal to a predetermined number. In the second display control mode, the control unit executes a display control at a second frame rate obtained by dividing the number of frames at the first frame rate by an integer equal to or larger than 2.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: July 12, 2016
    Assignee: Japan Display Inc.
    Inventors: Toshiharu Matsushima, Chihiro Tanaka
  • Liquid crystal display device
    Patent number: 9383614
    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: September 20, 2013
    Date of Patent: July 5, 2016
    Assignee: Japan Display Inc.
    Inventor: Toshiharu Matsushima
  • Liquid crystal display device and electronic apparatus
    Patent number: 9377658
    Abstract: According to an aspect, a liquid crystal display device includes a first electrode having a plurality of electrode base portions that extend in a first direction; a plurality of first comb-shaped portions that protrude from each of the plurality of electrode base portions in a second direction; and a plurality of second comb-shaped portions that protrude from each of the plurality of electrode base portions in an opposite direction to the second direction. Front edges of the first comb-shaped portions and the second comb-shaped portions that extend from the adjacent electrode base portions face each other with a gap therebetween, respectively. Transmission ineffective areas are formed at portions between the front edges facing each other, respectively, and not continuously aligned.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: June 28, 2016
    Assignee: Japan Display Inc.
    Inventors: Masaya Tamaki, Toshiharu Matsushima
  • DISPLAY DEVICE, ELECTRONIC APPARATUS, AND METHOD OF MANUFACTURING DISPLAY DEVICE
    Publication number: 20160161811
    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: February 17, 2016
    Publication date: June 9, 2016
    Inventor: Toshiharu Matsushima