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).

  • Publication number: 20200226347
    Abstract: According to an aspect, a fingerprint detection device includes: a substrate; a plurality of drive electrodes provided on one surface side of the substrate and arranged in a first direction; and a plurality of detection electrodes provided on the one surface side and arranged in a second direction intersecting the first direction. The detection electrodes intersect the drive electrodes in a normal direction of the substrate. Each of the detection electrodes includes: a plurality of first line portions; a plurality of second line portions extending in a direction intersecting the first line portions; and a plurality of bent portions each connecting one of the first line portions and one of the second line portions adjacent to the one of the first line portions to each other.
    Type: Application
    Filed: March 26, 2020
    Publication date: July 16, 2020
    Inventors: Hayato KURASAWA, Yoshitaka OZEKI, Toshinori UEHARA, Yuji SUZUKI
  • Publication number: 20200226343
    Abstract: According to an aspect, a fingerprint detection device includes: a substrate; a plurality of drive electrodes provided on one surface side of the substrate and arranged in a first direction; a plurality of detection electrodes provided on the one surface side and arranged in a second direction intersecting the first direction; and an insulating layer provided in a normal direction of the substrate between each of the drive electrodes and the corresponding detection electrodes. The detection electrodes intersect the drive electrodes in the normal direction of the substrate. The detection electrodes include: a first metallic layer; and a second metallic layer positioned closer to the one surface than the first metallic layer to the one surface. The first metallic layer has a reflectance of visible light lower than that of the second metallic layer.
    Type: Application
    Filed: March 24, 2020
    Publication date: July 16, 2020
    Inventors: Hayato KURASAWA, Yoshitaka OZEKI, Toshinori UEHARA, Yuji SUZUKI
  • Patent number: 10713462
    Abstract: A fingerprint detection device includes: a substrate having a first surface and a second surface on an opposite side of the first surface, the first surface serving as a detection surface configured to detect unevenness of an object in contact or in proximity; a detection electrode provided on the second surface side of the substrate and configured to detect unevenness of a finger in contact or in proximity on the basis of an electrostatic capacitance change; and a drive circuit provided on the second surface side of the substrate and configured to supply a drive signal to the detection electrode.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: July 14, 2020
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Toshinori Uehara, Hiroshi Mizuhashi
  • Publication number: 20200218380
    Abstract: A display device includes first electrodes, second electrodes, lines, and a controller, and includes a substrate, pixel electrodes, a display functional layer, and a common electrode stacked in this order. An insulating layer is between the common electrode and the first and second electrodes. The controller controls the pixel electrodes, the common electrode, the lines, and the first and second electrodes. During a display period, the pixel electrodes are supplied with a pixel signal through the lines, and the common electrode is supplied with a common signal. During a first sensing period, the lines are supplied with a first drive signal to generate a magnetic field. During a second sensing period, the lines are supplied with the first drive signal to generate the magnetic field, and an electromotive force corresponding to a distance between the lines and the first electrodes is generated in the first electrodes by the magnetic field.
    Type: Application
    Filed: March 18, 2020
    Publication date: July 9, 2020
    Applicant: Japan Display Inc.
    Inventors: Hayato KURASAWA, Hiroshi MIZUHASHI, Tadayoshi KATSUTA
  • Publication number: 20200218383
    Abstract: A display device with a touch detection device is provided and includes display elements arranged in matrix of row and column direction and surrounded by scan lines each extending in a first direction and a 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; light shielding members each extending in one direction, the light shielding members arranged between the display elements adjacent to each other; and touch detection electrodes each extending in the one direction and arranged between the light shielding members and the display elements, and the touch detection electrodes including metal wires that extend overlapping the light shielding members, 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 one direction, are disposed without crossing each other and spaced from each other in the one directio
    Type: Application
    Filed: March 23, 2020
    Publication date: July 9, 2020
    Inventors: Koji ISHIZAKI, Hayato KURASAWA, Kohei AZUMI
  • Publication number: 20200218872
    Abstract: A first substrate including a first surface and a second surface on an opposite side of the first surface, the first surface being a detection surface for detecting unevenness of an object coming in contact or close, a second substrate facing the other surface of the first substrate, and a sensor unit provided between the first substrate and the second substrate, and which detects the unevenness of a finger coming in contact with or close to the detection surface.
    Type: Application
    Filed: March 13, 2020
    Publication date: July 9, 2020
    Inventor: Hayato Kurasawa
  • Publication number: 20200210013
    Abstract: A detection device is provided and includes a detection electrode including first wire pieces, the detection electrode including a first wire and a second wire; and second wire pieces between the first wire and the second wire, wherein the first wire includes a first bent portion, the second wire includes a second bent portion, the first and second bent portions are formed by two of the first wire pieces including first and second edges, an angle of the first bent portion is different from an angle of the second bent portion, the first edge of the first bent portion is connected to the first edge of the second bent portion by a connecting portion, the second edge of the first bent portion is not in contact with the second edge of the second bent portion, and each of the second wire pieces is not connected to the first wire, the second wire, and the connecting portion.
    Type: Application
    Filed: March 6, 2020
    Publication date: July 2, 2020
    Inventors: Takeo KOITO, Koji ISHIZAKI, Hayato KURASAWA
  • Patent number: 10698245
    Abstract: According to one embodiment, a display device, includes a first substrate including a first conductive layer, a second substrate including a base having a first upper surface on a side opposite to a first lower surface opposed to the first substrate, a second conductive layer provided on the first upper surface, a third conductive layer provided on the first upper surface and electrically connected to the second conductive layer, a fourth conductive layer covering the third conductive layer and having a light-shielding property, a first through hole provided in the base, and an insulating material overlapping the connection material and having a light-shielding property.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: June 30, 2020
    Assignee: Japan Display Inc.
    Inventors: Yoshikatsu Imazeki, Hayato Kurasawa
  • Publication number: 20200201510
    Abstract: According to an aspect, a detection apparatus includes: a plurality of detection electrodes; a drive signal generation circuit configured to generate a drive signal; a detection circuit configured to be coupled to the detection electrodes to detect a detection signal based on the drive signal; and a first selection circuit. A first point in time when the drive signal makes a transition from a first potential to a second potential overlaps a first period in which the first selection circuit couples a detection electrode as a first selection target among the detection electrodes to the detection circuit. A second point in time when the drive signal makes a transition from the second potential to the first potential overlaps a second period in which the first selection circuit couples a detection electrode as a second selection target, which is not included in the first selection target, to the detection circuit.
    Type: Application
    Filed: December 20, 2019
    Publication date: June 25, 2020
    Inventors: Hayato KURASAWA, Toshinori UEHARA
  • Publication number: 20200192517
    Abstract: A detection apparatus is provided including a touch detection surface serving as a detection region having two dimensions; and first electrode components including divided electrodes arranged in the touch detection surface, first connection lines connected to one of the divided electrodes on a one-to-one basis, and a detection unit configured to output a detection signal to the divided electrodes via the first connection lines, wherein the first connection lines has a first switch between a corresponding one of the divided electrodes and the detection unit, in each of the first electrode components, the first connection lines are connected to each other between the first switches and the detection unit, and in each of the first electrode components, the divided electrodes function as one first electrode when all the first switches are closed.
    Type: Application
    Filed: February 21, 2020
    Publication date: June 18, 2020
    Inventors: Hayato KURASAWA, Yasuyuki TERANISHI
  • Patent number: 10678362
    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: March 26, 2019
    Date of Patent: June 9, 2020
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Hayato Kurasawa
  • Publication number: 20200174603
    Abstract: According to an example aspect, an electronic device comprises a substrate, pixels on the substrate, a first electrode overlapping the pixels in a plan view, and a second electrode overlapping an edge of the first electrode in a plan view. The first electrode has a first region that overlaps the second electrode in a plan view and a second region that does not overlap the second electrode in a plan view.
    Type: Application
    Filed: February 4, 2020
    Publication date: June 4, 2020
    Inventors: Hayato KURASAWA, Makoto HAYASHI, Naosuke FURUTANI
  • Patent number: 10670903
    Abstract: According to one embodiment, a display device comprises a first substrate includes a first area, a second area adjacent to the first area, and a first terminal portion located in the first area, and a second substrate includes an edge including a linear portion located between the first area and the second area, the second substrate overlapping the second area, wherein the second substrate further comprises a protruding portion protruding than the linear portion and a second terminal portion located in the protruding portion, and the display device further comprises a holding layer holding a gap between the second area and the protruding portion.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: June 2, 2020
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Hayato Kurasawa, Masanobu Ikeda
  • Patent number: 10664096
    Abstract: A detection apparatus includes a substrate, a plurality of first electrodes provided on the substrate, a first selection circuit provided on the substrate, the first selection circuit including a plurality of first input terminals that receive a first control signal supplied from an outside and a plurality of first output terminals that output a first selection signal based on the first control signal, and a second selection circuit provided on the substrate, the second selection circuit including a plurality of second input terminals that receive a second control signal supplied from the outside and a plurality of second output terminals that output a second selection signal based on the second control signal.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: May 26, 2020
    Assignee: Japan Display Inc.
    Inventors: Toshinori Uehara, Hayato Kurasawa
  • Patent number: 10664109
    Abstract: According to one embodiment, a display device includes a display panel having a display area, a first substrate opposed to the display panel, an adhesive layer arranged between the display panel and the first substrate, a first electrode formed at the first substrate in a peripheral area arranged along at least a part of an outer edge of the display area, a second electrode formed at the display panel in the peripheral area. In the display device, the first electrode includes a first portion which is opposed to the second electrode and a second portion which is not opposed to the second electrode, and the adhesive layer is interposed between the first portion and the second electrode.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: May 26, 2020
    Assignee: Japan Display Inc.
    Inventors: Daisuke Ito, Hayato Kurasawa, Toshihiko Fujiwara
  • Publication number: 20200150809
    Abstract: According to one embodiment, a touch detection device includes first detection electrodes in a detection area, second detection electrodes in the detection area, extending to intersect the first detection electrodes, first control lines connected to the first detection electrodes, respectively, and provided in a non-detection area, and second control lines connected to the second detection electrodes, respectively, and provided in the non-detection area. The second control lines overlap the first control lines at a plurality of positions as seen in plan view, such that areas of overlapping portions in which the first control lines overlap the second control lines are substantially equalized.
    Type: Application
    Filed: January 10, 2020
    Publication date: May 14, 2020
    Inventors: Chihiro TANAKA, Naoki TAKADA, Toshihiko TANAKA, Hayato KURASAWA, Koji ISHIZAKI, Tatsuya WAKIMOTO, Masaki MIYATAKE
  • Publication number: 20200150810
    Abstract: A display device comprises a first power supply line supplying a first potential, a second power supply line supplying a second potential, a third power supply line supplying a touch driving signal, and a display unit including a plurality of sub-pixels. The display unit comprises a plurality of first electrodes respectively provided in the plurality of sub-pixels and electrically connected to the first power supply line, a second electrode provided to be common among the plurality of sub-pixels and electrically connected to the second power supply line, a light emitting layer provided between the first electrode and the second electrode, a plurality of third electrodes electrically connected to the third power supply line, and a signal control circuit supplying a signal synchronized with a touch driving signal to the second electrode in a period in which a touch driving signal is supplied to the plurality of third electrodes.
    Type: Application
    Filed: January 14, 2020
    Publication date: May 14, 2020
    Inventors: Hiroshi Mizuhashi, Hayato Kurasawa, Yoshitoshi Kida, Toshinori Uehara, Takayuki Nakanishi
  • Patent number: 10649582
    Abstract: A detection apparatus includes a first substrate, a first electrode, a plurality of second electrodes, a detection controller, and a second electrode controller. The first electrode is disposed on the first substrate. The second electrodes have an area smaller than the area of the first electrode and overlap the first electrode. The detection controller is coupled to the first electrode and detects a detection signal corresponding to a capacitance change in the first electrode. The second electrode controller supplies, to some of second electrodes in the second electrodes, a guard signal for suppressing a capacitance change in overlapping areas of the first electrode overlapping the respective second electrodes.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: May 12, 2020
    Assignee: Japan Display Inc.
    Inventors: Toshinori Uehara, Hayato Kurasawa
  • Publication number: 20200142233
    Abstract: According to one embodiment, a display device comprises image signal lines, scanning signal lines, pixels, a display area, pixel electrodes, and common electrodes. The common electrodes are configured to detect an object and to display an image in the display area. The common electrodes include first and second common electrodes which are arranged in a first direction. A first slit is provided between the first and second common electrodes. The first and second common electrodes are supplied a signal different from each other. A second slit is provided in the first common electrode. Each of the first slit and the second slit overlaps one of the image signal lines and extends in an extension direction in which the image signal line extends.
    Type: Application
    Filed: January 2, 2020
    Publication date: May 7, 2020
    Applicant: JAPAN DISPLAY INC.
    Inventors: Kenta SEKI, Gen Koide, Hayato Kurasawa
  • Patent number: 10642434
    Abstract: A sensor-equipped display device is provided and includes a display panel and a detection electrode. The panel includes a display area in which pixels are arranged with a first pixel pitch in a first direction and a second pixel pitch in a second direction. The electrode includes an pattern having line fragments. The pattern has connection points at which ends of the fragments are connected to each other, and at least part of the connection points is arranged linearly such that an arrangement gaps thereof in the first and second direction is set to a first and second connection point pitch.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: May 5, 2020
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Koji Ishizaki