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).

  • Patent number: 10423021
    Abstract: In one embodiment, the present invention includes a substrate; a detection electrode provided in a display region on a plane parallel to the substrate, the detection electrode including a plurality of metal wires; a first conductive layer provided in a peripheral region located to the outside the display region; a protective layer provided on the detection electrode; a polarizing plate provided above the protective layer; and a second conductive layer provided between the polarizing plate and the protective layer in a direction perpendicular to the substrate. The second conductive layer has a higher sheet resistance than the metal wires and is electrically coupled to the first conductive layer.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: September 24, 2019
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Koji Ishizaki
  • Patent number: 10416827
    Abstract: To provide a display capable of reducing each resistance of a drive electrode and a detection electrode, in the display which is provided with an input device having the drive electrode and the detection electrode formed on the same plane. A drive electrode includes a plurality of first electrode portions arranged in an X-axis direction, and a plurality of first connection portions each of which electrically connects the two first electrode portions adjacent to each other. A detection electrode includes a plurality of second electrode portions arranged in a Y-axis direction, and a plurality of second connection portions each of which electrically connects the two second electrode portions adjacent to each other. The first connection portion overlaps with the second connection portion in a planar view. Each of the first electrode portion and the second electrode portion contains metal or alloy, and has a mesh shape.
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: September 17, 2019
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Hayato Kurasawa, Hiroshi Mizuhashi
  • Publication number: 20190278402
    Abstract: A display device with a touch detection device includes: a plurality of display elements that are arranged in a matrix of row and column directions and that are surrounded by scan lines each extending in a first direction and signal lines each extending in a second direction, the display elements including a red display element, a green display element, and a blue display element; a plurality of touch detection electrodes opposed to the display elements; a plurality of metal wires disposed on the touch detection electrodes, the metal wires extending along the signal lines and being disposed between the display elements adjacent to each other, wherein the metal wires are divided into metal wire parts that are arranged in the column direction, and the metal wire parts, each being longitudinal in the second direction, are disposed without crossing each other and spaced from each other in the column direction.
    Type: Application
    Filed: May 23, 2019
    Publication date: September 12, 2019
    Inventors: Koji ISHIZAKI, Hayato KURASAWA, Kohei AZUMI
  • Publication number: 20190278404
    Abstract: A detection device includes a plurality of drive electrodes, wherein: in a first mode, a first drive electrode block including a first number of the drive electrodes are supplied with a first drive signal; in a second mode, a second drive electrode block including a second number of the drive electrodes are supplied with a second drive signal; and the first number is different from the second number.
    Type: Application
    Filed: May 28, 2019
    Publication date: September 12, 2019
    Inventors: Koji ISHIZAKI, Kouji NOGUCHI, Tsutomu HARADA, Takeya TAKEUCHI, Yoshitoshi KIDA, Takayuki NAKANISHI
  • Patent number: 10394369
    Abstract: According to one embodiment, a display device includes a display area with pixels, and a detection electrode which includes first conductive lines overlapping the display area. Each of the pixels includes a first subpixel, a second subpixel adjacent to the first subpixel in a first direction, a third subpixel adjacent to the first subpixel in a second direction, and a fourth subpixel adjacent to the third subpixel in the first direction and to the second subpixel in the second direction. The pixels are arranged in the first direction with a first pitch, and the first conductive lines are arranged in the first direction with a second pitch which falls within a range of 2.2 times the first pitch or more and 3.2 times the first pitch or less.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: August 27, 2019
    Assignee: Japan Display Inc.
    Inventors: Takeyuki Tsuruma, Masaru Uchiyama, Michiaki Sakamoto, Koji Ishizaki
  • Publication number: 20190258356
    Abstract: A touch panel is disclosed herein. In an embodiment, the touch panel includes a substrate with first and second surfaces, a drive electrode facing the first surface, a plurality of touch detection electrodes facing the second surface, and a dummy electrode between adjacent touch detection electrodes. Each touch detection electrode includes a first conductive thin wire extending parallel to the first and second surfaces. The dummy electrode includes a second conductive thin wire extending along the first conductive thin wire. The first conductive thin wire includes a first bent portion and a second bent portion alternately arranged with the first conductive thin wire having a zigzag pattern. The second conductive thin wire includes a third bent portion and a slit that are alternately arranged. The third bent portion is arranged on a virtual straight line formed by virtually connecting the first bent portions of one first conductive thin wire.
    Type: Application
    Filed: May 2, 2019
    Publication date: August 22, 2019
    Inventors: Koji ISHIZAKI, Hayato KURASAWA, Takeo KOITO
  • Patent number: 10386984
    Abstract: A display unit with a touch detection function including: a plurality of touch detection electrodes arranged side by side to extend in a direction, each of the touch detection electrodes being formed in a predetermined electrode pattern including electrode portion and opening portion and outputting a detection signal, based on a variation in capacitance due to an external proximity object; and a plurality of display elements formed in a layer different from a layer of the touch detection electrodes, a predetermined number of the display elements being arranged within a width dimension of a region corresponding to each of the touch detection electrodes. The predetermined electrode pattern corresponds to a layout pattern of the display elements.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: August 20, 2019
    Assignee: JAPAN DISPLAY INC.
    Inventors: Koji Ishizaki, Koji Noguchi, Takayuki Nakanishi, Yasuyuki Matsui, Masanobu Ikeda
  • Patent number: 10386981
    Abstract: A display device with a touch detection function including: a plurality of 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: October 30, 2018
    Date of Patent: August 20, 2019
    Assignee: JAPAN DISPLAY INC.
    Inventors: Koji Ishizaki, Koji Noguchi, Osamu Ishige
  • Publication number: 20190250742
    Abstract: A detection device includes a first substrate including a first region, a second region and a third region, the second region arranged between the first region and the third region; a detection electrode arranged on the first substrate; a first electrode coupled to the detection electrode, continuously formed from the first region to the third region in a first direction on the first substrate, and including a plurality of concave portions in the second region; and a protective layer formed on the first electrode in the first region, wherein the protective layer is formed on a first one of the concave portions in the second region, wherein the protective film is not formed on a second one of the concave portions in the second region, the second one of the concave portions is arranged nearer to the third region than the first one of the concave portions.
    Type: Application
    Filed: April 25, 2019
    Publication date: August 15, 2019
    Inventors: Koji ISHIZAKI, Daisuke SONODA, Toshimasa ISHIGAKI
  • Patent number: 10379652
    Abstract: According to one embodiment, a sensor-equipped display device includes first electrodes and a detection electrode. The first electrodes constitute sensor drive electrodes by being supplied with sensor drive signals separately and sequentially or sensor drive electrodes by simultaneously supplying the sensor drive signals to the first electrodes adjacent to each other. A width of the sensor drive electrode including the first electrode on the edge is smaller than a width of the other sensor drive electrode not including the first electrode on the edge.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: August 13, 2019
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Yasuyuki Teranishi, Hiroshi Mizuhashi, Koji Ishizaki, Daisuke Ito
  • Publication number: 20190243484
    Abstract: A detection apparatus comprising: a first substrate; a detection region having a first detection side extending along a first direction parallel with a surface of the first substrate and a second detection side extending along a second direction intersecting the first direction; a frame region provided outside the detection region and having a first frame region extending along the first detection side and a second frame region extending along the second detection side; a first electrode provided at a position overlapping the detection region of the first substrate, the first electrode extending in the second direction; a second electrode provided at a position overlapping the detection region, the second electrode extending in the first direction; a plurality of terminals provided in the first frame region of the first substrate and arrayed in the first direction, and including a first terminal; a first wire; and a second wire.
    Type: Application
    Filed: January 24, 2019
    Publication date: August 8, 2019
    Inventors: Chihiro Tanaka, Hayato Kurasawa, Naoki Takada, Toshihiko Tanaka, Tatsuya Wakimoto, Keita Sasanuma, Koji Ishizaki
  • Patent number: 10365745
    Abstract: A display device with a touch detection function including a plurality of touch detection electrodes arranged in parallel to extend in one direction, formed with a predetermined electrode pattern including an electrode portion and aperture portions, and each outputting a detection signal based on a change of an electrostatic capacitance in response to an external proximity object, a plurality of display elements formed in a layer different from a layer provided with the touch detection electrodes, and arranged by a predetermined number in a width direction in a region corresponding to the touch detection electrode, and a plurality of dummy electrodes arranged in an inter-detection-electrode region of the plurality of touch detection electrodes. The aperture portions are provided to allow an arrangement area ratio of the touch detection electrode to be almost equal to an arrangement area ratio of the dummy electrodes in the inter-detection-electrode region.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: July 30, 2019
    Assignee: JAPAN DISPLAY INC.
    Inventors: Koji Ishizaki, Masanobu Ikeda, Yasuyuki Matsui
  • Publication number: 20190220127
    Abstract: According to an aspect, a display device with a touch detection function includes: a touch detection electrode that detects proximity or contact of an object; a drive electrode to which the excitation signal is applied; a first substrate on which the drive elements are provided; a second substrate on which at least one of the touch detection electrode and the drive electrode is provided, the second substrate being bonded to the first substrate to face each other via a sealing member; a conductor that electrically is coupled to at least one of the touch detection electrode and the drive electrode; and a conductor support member that fills a space between the first substrate and the second substrate and on the surface of which the conductor is provided.
    Type: Application
    Filed: March 26, 2019
    Publication date: July 18, 2019
    Inventors: Koji Ishizaki, Hayato Kurasawa
  • Publication number: 20190220136
    Abstract: A display device includes: a display layer; plural first electrodes formed to be arranged above the display layer; a shield electrode formed apart from the plural first electrodes so as to surround the whole plural first electrodes along an arrangement surface; an insulating layer; and a semiconductive layer formed opposite to the first electrodes and the shield electrode so as to sandwich the insulating layer, wherein the difference between an average potential of the first electrodes and an average potential of the shield electrode is equal to or less than 0.5V.
    Type: Application
    Filed: March 22, 2019
    Publication date: July 18, 2019
    Inventors: Hayato KURASAWA, Koji ISHIZAKI, Kohei AZUMI
  • Patent number: 10353528
    Abstract: A detection device includes a substrate; a plurality of first conductive thin wires provided in a plane parallel to the substrate and extending in a first direction; a plurality of second conductive thin wires provided in the same layer as that of the first conductive thin wires and extending in a second direction forming an angle with the first direction; first groups that are disposed in first strip-like regions respectively having a first width, each of the first groups including at least two of the first conductive thin wires displaced from one another in the second direction; and second groups that are disposed in second strip-like regions respectively having a second width, each of the second groups including at least two of the second conductive thin wires displaced from one another in the first direction.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: July 16, 2019
    Assignee: JAPAN DISPLAY INC.
    Inventors: Koji Ishizaki, Hayato Kurasawa
  • Publication number: 20190212870
    Abstract: A touch detection device includes: a substrate including a display region for displaying an image, a first frame region outside the display region, and a second frame region outside the first frame region; a plurality of detection electrodes that are arranged in the display region on a face parallel with the substrate and include metal wires; and frame wires that are coupled to the detection electrodes and arranged in the first frame region and the second frame region. A ratio of a covering area of the frame wires to a predetermined area of the substrate in the first frame region is smaller than a ratio of the covering area of the frame wires to the predetermined area of the substrate in the second frame region.
    Type: Application
    Filed: March 18, 2019
    Publication date: July 11, 2019
    Inventors: Koji ISHIZAKI, Hayato KURASAWA
  • Patent number: 10345982
    Abstract: According to an aspect, a detection device includes: a substrate; a detection electrode disposed on a plane parallel to a surface of the substrate and including conductive thin wires and electrical coupling portions disposed where the conductive thin wires intersect with each other or are bent, and are coupled with each other, the conductive thin wires being arranged in a mesh-like form; a coupling wire that couples the conductive thin wires with a detecting unit at an end portion of the detection electrode; and a protective layer that is made of an insulation material and that covers the detection electrode and the coupling wire. An area density of the conductive thin wires per unit area is smaller in an end region ranging from an electrical coupling portion closest to the coupling wire to the coupling wire than in a region of the entire detection electrode.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: July 9, 2019
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Masahiro Teramoto, Yuji Sato
  • Publication number: 20190204984
    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: Application
    Filed: March 7, 2019
    Publication date: July 4, 2019
    Applicant: Japan Display Inc.
    Inventors: Takayuki Nakanishi, Koji Noguchi, Koji Ishizaki, Yasuyuki Teranishi, Takeya Takeuchi
  • Publication number: 20190196637
    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: February 28, 2019
    Publication date: June 27, 2019
    Inventors: Takeo KOITO, Koji ISHIZAKI, Hayato KURASAWA
  • Publication number: 20190189041
    Abstract: According to one embodiment, a display device includes a display, a touchpanel, a memory and a processor. The display displays a shelf label image including a product information item of a product displayed on a display shelf. The touchpanel in or on the display detects a contact position of an object. The processor executes a program stored in the memory, makes a state of the touchpanel from an inactive state to an active state when an external terminal is connected to the display device, detects a type of an action, based on the contact position of the object detected by the touchpanel in the active state, changes the shelf label image displayed on the display in accordance with the type of the action.
    Type: Application
    Filed: December 14, 2018
    Publication date: June 20, 2019
    Inventors: Koji ISHIZAKI, Takao AMBAI, Taro ICHIMURA