Patents by Inventor Hayato Kurasawa

Hayato Kurasawa 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: 10303288
    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: Grant
    Filed: July 18, 2017
    Date of Patent: May 28, 2019
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Hayato Kurasawa, Takeo Koito
  • Patent number: 10303320
    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: Grant
    Filed: August 8, 2018
    Date of Patent: May 28, 2019
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Hayato Kurasawa, Kohei Azumi
  • Patent number: 10296156
    Abstract: According to an aspect, a touch detection device includes a drive electrode layer including a plurality of drive electrodes formed in stripes in an array direction; a plurality of touch detection electrodes that are arranged in a manner facing the plurality of drive electrodes and generate capacitance with the plurality of drive electrodes; and a touch detecting unit that applies a touch drive signal to the plurality of drive electrodes and detects a position of an object in contiguity with a touch detection area based on detection signals supplied from the plurality of touch detection electrodes. The plurality of the drive electrodes include an end drive electrode that is provided to at least one end in the array direction and has a larger width in the array direction than the width in the array direction of drive electrodes other than the end drive electrode.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: May 21, 2019
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Yasuyuki Teranishi, Yoshitoshi Kida
  • Patent number: 10296150
    Abstract: A detection apparatus includes a first electrode, a second electrode provided at a position that does not overlap with the first electrode, a third electrode arranged facing the first electrode and the second electrode via a spacing, and a detector configured to apply a drive signal to the first electrode and detect an output signal appearing in the second electrode.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: May 21, 2019
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Yasuyuki Teranishi, Hiroshi Mizuhashi, Takeo Koito, Shuji Hayashi
  • Publication number: 20190146619
    Abstract: According to an aspect, a display device includes: a first substrate; a display functional layer; a plurality of first electrodes; a light guide plate; a plurality of second electrodes; and a controller configured to control the first electrodes and the second electrodes. The first substrate, the display functional layer, the first electrodes, the light guide plate, and the second electrodes are stacked in this order. The controller performs operations during a plurality of display periods to display an image, during a first sensing period, and during a second sensing period in a time-division manner. The first electrodes are supplied with a first drive signal and an electromotive force caused by electromagnetic induction is generated in the second electrodes during the first sensing period. The first electrodes are supplied with a second drive signal to generate electrostatic capacitance between the first electrodes and the second electrodes during the second sensing period.
    Type: Application
    Filed: October 26, 2018
    Publication date: May 16, 2019
    Applicant: Japan Display Inc.
    Inventors: Hayato KURASAWA, Toshinori UEHARA
  • Publication number: 20190146281
    Abstract: A liquid crystal display panel is provided and includes a pair of substrates arranged face to face so as to sandwich a liquid crystal layer, a lower electrode formed on a lower substrate, an upper electrode formed on the lower substrate through an insulating layer, in which plural slits are formed in each sub-pixel, wherein each of the plural slits is formed as an aperture in which both ends thereof in the longitudinal direction are closed, and an alignment film formed so as to cover a surface of the upper electrode and the insulating layer. The plural slits have different widths at both ends of slits in a longitudinal direction, and a rubbing direction of the alignment film is a direction crossing longitudinal edges of each of the slits.
    Type: Application
    Filed: January 9, 2019
    Publication date: May 16, 2019
    Inventors: Aya Yoso, Joji Nishimura, Hayato Kurasawa
  • Publication number: 20190138134
    Abstract: To reduce disturbances in display of images due to static electricity without deteriorating optical properties in a display. The display includes a conductive pattern provided on the upper surface of the substrate, a protection layer provided on the upper surface of the substrate to cover the conductive pattern, and a conductive layer provided on the protection layer. The sheet resistance of the conductive pattern is not more than 8 ?/square. A ratio of the total sum of areas of portions of the plurality of sub-pixels that overlap the conductive pattern in a plan view to the total sum of the areas of the plurality of sub-pixels is 1 to 22%. A sheet resistance of the conductive layer is higher than the sheet resistance of the conductive pattern.
    Type: Application
    Filed: January 4, 2019
    Publication date: May 9, 2019
    Inventors: Masanobu Ikeda, Koji Ishizaki, Hayato Kurasawa, Yoshihiro Watanabe, Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide
  • Patent number: 10282017
    Abstract: According to one embodiment, a display device includes a plurality of gate lines, a plurality of data lines intersecting with the gate lines, a plurality of pixel electrodes provided in areas defined by the gate lines and the data lines, and a sensor drive controller which includes a plurality of common electrodes facing the pixel electrodes and detects a touch by using the common electrodes. The sensor drive controller selects at least one of the common electrodes as a sensor electrode, detects a touch by using the sensor electrode, and inputs, to the other common electrodes, a guard signal for reducing generation of capacitance between the other common electrodes and the sensor electrode.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: May 7, 2019
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Hiroshi Mizuhashi, Koji Noguchi, Takafumi Suzuki
  • Patent number: 10282029
    Abstract: Included are a first cover base including an alkali glass layer, a first alkali-free glass layer provided on one face of the alkali glass layer, and a second alkali-free glass layer provided on another face of the alkali glass layer and a sensor that is provided on the first alkali-free glass layer of the first cover base and includes a plurality of first electrodes configured to detect the unevenness of a surface of an object to be detected that comes into contact with or close to the first cover base and a switching element. At least the first electrodes are formed above the first alkali-free glass layer and in a transmissive area that passes an image.
    Type: Grant
    Filed: July 6, 2017
    Date of Patent: May 7, 2019
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Shoji Hinata, Toshinori Uehara, Hiroshi Mizuhashi, Yuji Suzuki, Yasuhiro Kanaya
  • Patent number: 10275074
    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: Grant
    Filed: September 30, 2016
    Date of Patent: April 30, 2019
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Hayato Kurasawa
  • Patent number: 10275108
    Abstract: According to an aspect, a detecting apparatus includes: a touch detection electrode provided along a touch detection surface; a strain gauge integrated with the touch detection electrode.
    Type: Grant
    Filed: October 18, 2018
    Date of Patent: April 30, 2019
    Assignee: Japan Display Inc.
    Inventors: Shinya Iuchi, Taiki Kasai, Hayato Kurasawa
  • Patent number: 10268300
    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: Grant
    Filed: December 21, 2017
    Date of Patent: April 23, 2019
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Hayato Kurasawa
  • Publication number: 20190114015
    Abstract: According to one embodiment, a sensor-equipped display device includes a display panel which includes a sensor driving electrode disposed in a display area for displaying an image, detection electrodes each including a body portion opposed to the sensor driving electrode in the display area and a broadened portion connected to the body portion and formed to be wider than the body portion, and a lead line disposed in a non-display area outside the display area and electrically connected to the broadened portion. The broadened portion is disposed in the non-display area without being overlaid on the display area in planar view.
    Type: Application
    Filed: December 3, 2018
    Publication date: April 18, 2019
    Inventors: Hayato KURASAWA, Toshihiko TANAKA, Naoki TAKADA, Chihiro TANAKA, Koji ISHIZAKI
  • Patent number: 10261627
    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: Grant
    Filed: June 15, 2017
    Date of Patent: April 16, 2019
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Koji Ishizaki, Kohei Azumi
  • Patent number: 10261629
    Abstract: A detection device is capable of detecting an external proximity object, and includes a substrate and a plurality of detection electrodes. The detection electrodes are each provided with a plurality of thin conductive wires having a plurality of first thin wire pieces and a plurality of second thin wire pieces which are electrically conducted with one another. Angles each of which is formed by an intersection between the first thin wire piece extending in a first direction and the second thin wire piece extending in a second direction different from the first direction included in the thin conductive wire, are constant, and a distance between the first thin wire pieces of different thin conductive wires is not constant.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: April 16, 2019
    Assignee: Japan Display Inc.
    Inventor: Hayato Kurasawa
  • Publication number: 20190107910
    Abstract: A display apparatus with a touch detection function includes: a substrate; a display area including a plurality of pixels; a touch detection electrode including a plurality of small electrode portions; a plurality of wiring portions electrically coupling the small electrode portions to a terminal portion formed; and a plurality of drive electrodes forming capacitance between the drive electrodes and the touch detection electrode. The small electrode portions each include one conductive thin wire in which one first thin wire segment and one second thin wire segment are coupled in a first direction, the first thin wire segment makes a first angle with respect to the first direction, the second thin wire segment makes a second angle with respect to the first direction, and the wiring portions each include the one first thin wire segment and the one second thin wire segment that are coupled in the first direction.
    Type: Application
    Filed: November 30, 2018
    Publication date: April 11, 2019
    Inventors: Hayato Kurasawa, Koji Ishizaki
  • Publication number: 20190107914
    Abstract: According to one embodiment, an electrostatic capacitance-type sensor-equipped display device includes a display panel with a display surface which displays an image. The sensor includes a plurality of detection electrodes disposed in a matrix, the detection electrodes being mutually electrically independently provided above the display surface and being configured to detect a variation in electrostatic capacitance, and a plurality of lead lines provided above the display surface, connected to the detection electrodes in a one-to-one correspondence, and formed of a metal.
    Type: Application
    Filed: November 27, 2018
    Publication date: April 11, 2019
    Inventors: Koji Noguchi, Koji Ishizaki, Hayato Kurasawa
  • Patent number: 10254869
    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: July 25, 2018
    Date of Patent: April 9, 2019
    Assignee: Japan Display Inc.
    Inventors: Takeo Koito, Koji Ishizaki, Hayato Kurasawa
  • Publication number: 20190102020
    Abstract: A detection apparatus includes a substrate, a plurality of first electrode blocks provided on the substrate, each of the first electrode blocks including a plurality of first electrodes, and a first electrode selection circuit configured to select at least one of the first electrode blocks in a time-division manner in a first detection period and select at least one of the first electrodes in a second detection period. The least one of the first electrode blocks selected by the first electrode selection circuit is supplied with a first drive signal in the first detection period, and the at least one of the first electrodes selected by the first electrode selection circuit is supplied with a second drive signal, a voltage level of the second drive signal different from a voltage level of the first drive signal in the second detection period.
    Type: Application
    Filed: September 24, 2018
    Publication date: April 4, 2019
    Inventors: Yuji SUZUKI, Toshinori UEHARA, Hayato KURASAWA
  • Publication number: 20190102038
    Abstract: A detection apparatus includes a substrate, a plurality of first electrodes provided on the substrate, and a first electrode selection circuit provided on the substrate and including a first selection circuit configured to provide a first selection signal having a phase determined for each of the plurality of first electrodes and a second selection circuit configured to provide a second selection signal having a phase determined for each of first electrode blocks including the plurality of first electrodes.
    Type: Application
    Filed: September 20, 2018
    Publication date: April 4, 2019
    Inventors: Toshinori UEHARA, Hayato KURASAWA, Takanori TSUNASHIMA, Kenshi TADA