Patents by Inventor Koji Ishizaki

Koji Ishizaki 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: 20160349911
    Abstract: A touch detector capable of achieving high position resolution while improving detection sensitivity to a touch is provided. The touch detector includes: a plurality of drive electrodes arranged side by side to extend in one direction; a detection electrode extending in a direction orthogonal to a direction where the drive electrodes extend, and arranged to form a capacitance at each of intersections with the drive electrodes; and a scanning drive section sequentially selecting a predetermined plural number of target electrodes from the plurality of drive electrodes in a time-divisional manner, and applying a touch detection drive signal with a plurality of pulse waveforms for detecting an external adjacent object to the selected target electrodes to perform a scanning drive. A scanning pitch in the scanning drive is smaller than the total width of the plural number of selected target electrodes.
    Type: Application
    Filed: August 11, 2016
    Publication date: December 1, 2016
    Inventors: Kohei Azumi, Yoshitoshi Kida, Koji Noguchi, Koji Ishizaki
  • Patent number: 9507196
    Abstract: The reliability of a display device with an input device is improved. A plurality of detection electrodes (input position detection electrodes) forming an electrostatic capacity between them and a common electrode of a display device to detect an input position are formed on a different substrate from substrates configuring the display device. Moreover, a polarizing plate and the substrate on which the plurality of detection electrodes are formed are adhesively fixed via, for example, an adhesive layer so that the plurality of detection electrodes are fixed so as to be separated apart from the display device. Thus, a distance between electrodes (the detection electrode and a driving electrode) for detecting an input position can be set separately from a thickness of the display device, and therefore, reduction in detection sensitivity (detection reliability) for the input position due to increase in the electrostatic capacity can be suppressed.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: November 29, 2016
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Kohei Azumi, Koji Ishizaki, Hideki Kaneko, Tsutomu Harada
  • Patent number: 9507479
    Abstract: A display device with a touch detection function includes a display function layer, a plurality of touch detection electrodes arranged side by side to extend in a first direction, and a plurality of drive electrodes arranged side by side to extend in a second direction, electrostatic capacitance being formed at intersections of the touch detection electrodes and the drive electrodes. The plurality of drive electrodes extends to a first position or a second position outside of the first position, the first position being away from a center of an outermost touch detection electrode by a half length of an arrangement pitch of the touch detection electrodes, the outermost touch detection electrode being defined as outermost one of touch detection electrodes included in an effective display region of the display function layer, and an outer edge of the effective display region is located on or inside the first position.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: November 29, 2016
    Assignee: Japan Display Inc.
    Inventors: Yuichiro Minami, Masahiro Minegishi, Koji Noguchi, Koji Ishizaki, Yoshitoshi Kida, Kohei Azumi
  • Patent number: 9501988
    Abstract: A display device includes: a plurality of drive electrodes extending in a first direction and arranged side-by-side in a second direction with an inter-electrode slit in between; and a plurality of pixel electrodes arranged in matrix in the first and second directions. Each of the drive electrodes has one or more inner-electrode slits, and a center of the pixel electrode is located in the inter-electrode slit or in the inner-electrode slit.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: November 22, 2016
    Assignee: JAPAN DISPLAY INC.
    Inventors: Koji Noguchi, Eiji Sakai, Masanobu Ikeda, Koji Ishizaki
  • Patent number: 9501196
    Abstract: A display apparatus includes: a display face; a display function layer adapted to vary display on the display face in response to an inputted image signal; a plurality of driving electrodes disposed separately in one direction; a detection scanning control section configured to apply a detection driving voltage to some of the plural driving electrodes and carry out detection driving scanning while shifting an application object of the detection driving voltage in the one direction on the display face and then control the detection driving scanning such that jump shift of carrying out shift with a pitch of twice or more times a driving electrode pitch is included; and a plurality of sensor lines disposed separately in a direction different from the one direction and responding to touch or proximity of a detection object with or to the display face to exhibit an electric variation.
    Type: Grant
    Filed: March 13, 2016
    Date of Patent: November 22, 2016
    Assignee: Japan Display, Inc.
    Inventors: Takeya Takeuchi, Koji Noguchi, Koji Ishizaki, Yasuyuki Teranishi, Takayuki Nakanishi
  • Publication number: 20160334907
    Abstract: A display device with a touch detection function including: a plurality of liquid crystal display elements performing display operation; a plurality of touch detection electrodes arranged side by side to extend in one direction, and each outputting a detection signal based on a change in an electrostatic capacitance caused by an external proximity object; a conductive film insulated from or connected with high resistance to the touch detection electrodes, and disposed to cover the touch detection electrodes; and a touch detection circuit detecting the external proximity object by sampling the detection signal. The conductive film has a sheet resistance equal to or smaller than a predetermined resistance value, and has a time constant larger than a predetermined minimum time constant defined by sampling timings in the touch detection circuit.
    Type: Application
    Filed: July 29, 2016
    Publication date: November 17, 2016
    Inventors: Koji Ishizaki, Koji Noguchi, Osamu lshige
  • Patent number: 9495044
    Abstract: An image display device includes: a first substrate which has a first surface and a second surface facing the first surface; a second substrate which has a first surface and a second surface facing the first surface, the first surface being arranged to face the second surface of the first substrate, and is made of a transparent material; and an image display layer which is arranged between the first substrate and the second substrate, wherein a driving electrode is provided on the first surface of the second substrate, a plurality of first detection electrodes are provided on the second surface of the second substrate, a second detection electrode is provided on the first substrate, the first detection electrodes and the driving electrode constitute a capacitance-type first touch panel unit, and the second detection electrode and the driving electrode constitute a capacitance-type second touch panel unit.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: November 15, 2016
    Assignee: Japan Display Inc.
    Inventors: Yoshitoshi Kida, Koji Noguchi, Koji Ishizaki, Kohei Azumi
  • Publication number: 20160320890
    Abstract: According to an aspect, a display device with a touch detecting function includes: a substrate; a display area; a touch detection electrode provided with a plurality of conductive thin wires, each of the conductive thin wires including a plurality of thin wire pieces each having a linear shape and including a first end and a second end; a drive electrode; and a display functional layer. The adjacent thin wire pieces are arranged so as to be bent at a bent portion serving as a portion at which the second end of the one thin wire piece of the adjacent thin wire pieces is connected to the first end of the other thin wire piece of the adjacent thin wire pieces, and the conductive thin wires include a bent portion having an angle formed by the adjacent thin wire pieces different from angles of the other bent portions.
    Type: Application
    Filed: July 13, 2016
    Publication date: November 3, 2016
    Inventors: Takeo KOITO, Koji ISHIZAKI, Hayato KURASAWA
  • Patent number: 9471165
    Abstract: According to an aspect, a display device with a touch detecting function includes: a substrate; a display area; a touch detection electrode provided with a plurality of conductive thin wires, each of the conductive thin wires including a plurality of thin wire pieces each having a linear shape and including a first end and a second end; a drive electrode; and a display functional layer. The adjacent thin wire pieces are arranged so as to be bent at a bent portion serving as a portion at which the second end of the one thin wire piece of the adjacent thin wire pieces is connected to the first end of the other thin wire piece of the adjacent thin wire pieces, and the conductive thin wires include a bent portion having an angle formed by the adjacent thin wire pieces different from angles of the other bent portions.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: October 18, 2016
    Assignee: Japan Display Inc.
    Inventors: Takeo Koito, Koji Ishizaki, Hayato Kurasawa
  • Publication number: 20160291759
    Abstract: According to one embodiment, a sensor-equipped display device includes a display panel including pixel electrodes and common electrodes, a cover member opposed to the display panel, a polarizer located between the display panel and the cover member, and a first detection module located between the polarizer and the cover member. The first detection module includes a first detection electrode including dot-like openings and a dummy module including dot-like dummy electrodes.
    Type: Application
    Filed: March 30, 2016
    Publication date: October 6, 2016
    Inventors: Hayato Kurasawa, Koji Ishizaki, Tomohiko Otani
  • Publication number: 20160291723
    Abstract: [Problem] To prevent detachment of overcoat layer which covers at least a part of a terminal formed on a substrate. [Measure to solve the problem] According to one embodiment, a detection device includes a substrate, detection electrode, terminal formed of a metal material, lead, coating layer, conductive adhesion layer, and circuit board. The lead connects the electrode and the terminal. The coating layer covers the electrode and the lead, and partly covers the terminal. The adhesion layer covers a part of the terminal exposed from the coating layer and covers a part of the coating layer. The circuit board is connected to the terminal with the adhesion layer interposed therebetween. At least in an overlapping area where the conductive adhesion layer covers the coating layer, the metal material that forms the terminal includes a shape that the metal material is partly removed.
    Type: Application
    Filed: November 20, 2015
    Publication date: October 6, 2016
    Inventors: Hayato Kurasawa, Keisuke Asada, Tatsuya Ide, Koji Ishizaki
  • Patent number: 9459718
    Abstract: Disclosed herein is a display device including a substrate, a plurality of pixel electrodes arranged in a form of a matrix in a plane parallel with the substrate, a display functional layer exerting an image display function on a basis of an image signal supplied to the plurality of pixel electrodes, a driving electrode opposed to the plurality of pixel electrodes, and a plurality of detecting electrodes arranged in a form of a plane opposed to the driving electrode, separated and arranged at a pitch of a natural number multiple of an arrangement pitch of the pixel electrodes in one direction in the arrangement plane, and each capacitively coupled with the driving electrode.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: October 4, 2016
    Assignee: JAPAN DISPLAY INC.
    Inventors: Koji Ishizaki, Kouji Noguchi
  • Patent number: 9454279
    Abstract: An information input device including a touch panel configured to be provided with a touch sensor that detects a position at which a sensing object is brought close to a sensing surface. In this information input device, the touch sensor has a scanning electrode and a detecting electrode that is opposed to the scanning electrode with the intermediary of a dielectric substance, and is a capacitive sensor whose electrostatic capacitance changes if the sensing object is brought close to the detecting electrode. Furthermore, a slit is formed in a surface of the detecting electrode opposed to the scanning electrode.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: September 27, 2016
    Assignee: JAPAN DISPLAY INC.
    Inventors: Takayuki Nakanishi, Koji Noguchi, Koji Ishizaki, Yasuyuki Teranishi, Takeya Takeuchi
  • Patent number: 9442595
    Abstract: A touch detector capable of achieving high position resolution while improving detection sensitivity to a touch is provided. The touch detector includes: a plurality of drive electrodes arranged side by side to extend in one direction; a detection electrode extending in a direction orthogonal to a direction where the drive electrodes extend, and arranged to form a capacitance at each of intersections with the drive electrodes; and a scanning drive section sequentially selecting a predetermined plural number of target electrodes from the plurality of drive electrodes in a time-divisional manner, and applying a touch detection drive signal with a plurality of pulse waveforms for detecting an external adjacent object to the selected target electrodes to perform a scanning drive. A scanning pitch in the scanning drive is smaller than the total width of the plural number of selected target electrodes.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: September 13, 2016
    Assignee: Japan Display Inc.
    Inventors: Kohei Azumi, Yoshitoshi Kida, Koji Noguchi, Koji Ishizaki
  • Patent number: 9442608
    Abstract: A display device with a touch detection function includes: a plurality of liquid crystal display elements performing display operation; a plurality of touch detection electrodes arranged side by side to extend in one direction, and each outputting a detection signal based on a change in an electrostatic capacitance caused by an external proximity object; a conductive film insulated from or connected with high resistance to the touch detection electrodes, and disposed to cover the touch detection electrodes; and a touch detection circuit detecting the external proximity object by sampling the detection signal. The conductive film has a sheet resistance equal to or smaller than a predetermined resistance value, and has a time constant larger than a predetermined minimum time constant defined by sampling timings in the touch detection circuit.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: September 13, 2016
    Assignee: JAPAN DISPLAY INC.
    Inventors: Koji Ishizaki, Koji Noguchi, Osamu Ishige
  • Publication number: 20160259476
    Abstract: A display device is configured that the common electrode wiring layer is divided in a source wiring layer direction, the metal wiring layer is disposed above the source wiring layer at a position in contact with the upper part of the common electrode wiring layer, and the metal wiring layer is not disposed at a position where the common electrode wiring layer is divided. Alternatively, the metal wiring layer is not disposed at a position between the same colors as those at the division position of the common electrode wiring layer.
    Type: Application
    Filed: May 12, 2016
    Publication date: September 8, 2016
    Inventors: Shigesumi ARAKI, Mitsutaka Okita, Kazuhiro Nishiyama, Yoshitoshi Kida, Koji Ishizaki, Kohei Azumi, Hiroshi Mizuhashi
  • Publication number: 20160195960
    Abstract: A display apparatus includes: a display face; a display function layer adapted to vary display on the display face in response to an inputted image signal; a plurality of driving electrodes disposed separately in one direction; a detection scanning control section configured to apply a detection driving voltage to some of the plural driving electrodes and carry out detection driving scanning while shifting an application object of the detection driving voltage in the one direction on the display face and then control the detection driving scanning such that jump shift of carrying out shift with a pitch of twice or more times a driving electrode pitch is included; and a plurality of sensor lines disposed separately in a direction different from the one direction and responding to touch or proximity of a detection object with or to the display face to exhibit an electric variation.
    Type: Application
    Filed: March 13, 2016
    Publication date: July 7, 2016
    Inventors: Takeya TAKEUCHI, Koji NOGUCHI, Koji ISHIZAKI, Yasuyuki TERANISHI, Takayuki NAKANISHI
  • Publication number: 20160188044
    Abstract: According to an aspect, a display device with a touch detection function includes: a substrate; a drive electrode that extends in a first direction; and a plurality of touch detection electrodes that are metal wirings extending in a second direction different from the first direction. The metal wirings are arranged with a predetermined pitch so as to make capacitive coupling with the drive electrode.
    Type: Application
    Filed: March 9, 2016
    Publication date: June 30, 2016
    Inventors: Koji Ishizaki, Hayato Kurasawa, Kohei Azumi
  • Patent number: 9367165
    Abstract: A display device is configured that the common electrode wiring layer is divided in a source wiring layer direction, the metal wiring layer is disposed above the source wiring layer at a position in contact with the upper part of the common electrode wiring layer, and the metal wiring layer is not disposed at a position where the common electrode wiring layer is divided. Alternatively, the metal wiring layer is not disposed at a position between the same colors as those at the division position of the common electrode wiring layer.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: June 14, 2016
    Assignee: Japan Display Inc.
    Inventors: Shigesumi Araki, Mitsutaka Okita, Kazuhiro Nishiyama, Yoshitoshi Kida, Koji Ishizaki, Kohei Azumi, Hiroshi Mizuhashi
  • Publication number: 20160154520
    Abstract: A touch detection device includes: a detection surface; a plurality of sensor lines formed from a plurality of types of wiring lines having a different line capacitance; and a touch detection unit which detects an electric variation generated in a plurality of the sensor lines in response to touch or proximity of a detection target object to the detection surface, wherein the touch detection unit has an operational circuit for generating a detection signal representing the electric variation by performing an operation process using a line capacitance ratio for a plurality of outputs from a plurality of types of the sensor lines neighboring to one another with a different line capacitance.
    Type: Application
    Filed: January 21, 2016
    Publication date: June 2, 2016
    Inventors: Koji ISHIZAKI, Kouji NOGUCHI, Takeya TAKEUCHI, Takayuki NAKANISHI, Yasuyuki TERANISHI