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: 11029793
    Abstract: A touch detecting device and a touch-detection capable display device are provided each including: a substrate; a touch detection electrode provided on a plane parallel to the substrate and including a plurality of metal wires; a first conductive layer overlapping the metal wires in contact therewith and provided between the substrate and each of the metal wires in a direction perpendicular to the substrate; and a second conductive layer provided above the metal wires. At least one of the first conductive layer and the second conductive layer has a higher sheet resistance than the metal wires.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: June 8, 2021
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Hayato Kurasawa
  • Patent number: 11023700
    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: Grant
    Filed: March 13, 2020
    Date of Patent: June 1, 2021
    Assignee: Japan Display Inc.
    Inventor: Hayato Kurasawa
  • Publication number: 20210157468
    Abstract: A display device with a touch sensor having a display function and a touch sensor function is provided. The display device includes a first substrate including a pixel electrode; a first electrode along a first direction; and a second substrate including a second electrode that includes patterns of electrodes along a second direction crossing the first direction and that faces the first electrode and the pixel electrode, wherein upon the display function being activated, the pixel electrode is supplied with a pixel signal, and the second electrode is supplied with common voltage, and upon the touch sensor function being activated, the first electrode is applied with a first signal and the second electrode is configured to receive the first signal to be a second signal as a touch detecting signal.
    Type: Application
    Filed: February 2, 2021
    Publication date: May 27, 2021
    Inventors: Naosuke FURUTANI, Hayato KURASAWA, Makoto HAYASHI
  • Patent number: 11016593
    Abstract: According to one embodiment, a sensor device is provided and including electrodes each including a first line, a second line, and a third line; and a lead line connected to one of the electrodes at a first end portion of the one of the electrodes, wherein the first to third lines are electrically connected to each other, the first line runs in a first direction, the second line runs in a second direction different from the first direction, and intersects the first line, the electrodes are arranged in a third direction different from the first and second directions, the third line runs in the third direction and located along the first end portion, the lead line is drawn from the third line, and detection signals are detected by the electrodes.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: May 25, 2021
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Toshihiko Tanaka, Naoki Takada, Chihiro Tanaka, Koji Ishizaki
  • Patent number: 10996784
    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: Grant
    Filed: March 23, 2020
    Date of Patent: May 4, 2021
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Hayato Kurasawa, Kohei Azumi
  • Patent number: 10990340
    Abstract: A display apparatus includes a plurality of display panels arranged in a matrix, each of the image display panel includes a plurality of drive electrodes extending in a first direction and a plurality of detection electrodes extending in a second direction crossing the first direction, wherein an AC voltage is sequentially applied to the plurality of drive electrodes of a first display panel, and the plurality of detection electrodes of a second display panel adjacent to the first display panel detect a signal output from the plurality of drive electrodes of the first display panel.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: April 27, 2021
    Assignee: Japan Display Inc.
    Inventors: Shinya Iuchi, Hayato Kurasawa, Masahiro Togashi, Tsutomu Harada, Yuji Suzuki
  • Publication number: 20210109391
    Abstract: A display device includes: a plurality of first electrodes arranged in a display region for displaying an image; a second electrode opposed to the first electrodes; a plurality of switching elements that are arranged in the display region and coupled to the first electrodes or the second electrode; a gate line for supplying a scanning signal for scanning the switching elements; a data line for supplying a signal to the switching elements that are coupled to the switching elements; and conductive wire that is opposed to the second electrode via an insulating layer and is coupled to the switching elements.
    Type: Application
    Filed: November 30, 2020
    Publication date: April 15, 2021
    Inventors: Hayato Kurasawa, Hiroshi Mizuhashi
  • Publication number: 20210109414
    Abstract: A display device includes: a first pixel including a first sub-pixel, a second sub-pixel, and a third sub-pixel; and a second pixel including the first sub-pixel, the second sub-pixel, and a fourth sub-pixel. The first pixel and the second pixel are alternately arranged in a row direction and a column direction. The third sub-pixel and the fourth sub-pixel are alternately arranged in the column direction. A branch electrode in one of two first sub-pixels adjacent in the column direction extends in a first direction, and a branch electrode in the other thereof extends in a second direction. A branch electrode in one of two second sub-pixels adjacent in the column direction extends in the first direction, and a branch electrode in the other thereof extends in the second direction. Each branch electrode in the third sub-pixel and the fourth sub-pixel includes a bending portion.
    Type: Application
    Filed: December 22, 2020
    Publication date: April 15, 2021
    Inventors: Masaaki KABE, Jin HIROSAWA, Hayato KURASAWA
  • Patent number: 10977472
    Abstract: According to an aspect, a detection device includes: an insulating substrate including a plurality of detection electrodes; a transmission conductor disposed adjacent to the detection electrodes; a drive signal generator coupled to the transmission conductor; and a detector coupled to the detection electrodes. The drive signal generator generates a detection drive signal and supplies the detection drive signal to the transmission conductor. The detector detects a detection signal corresponding to a change in capacitance in the detection electrodes.
    Type: Grant
    Filed: September 24, 2018
    Date of Patent: April 13, 2021
    Assignee: Japan Display Inc.
    Inventors: Yuji Suzuki, Toshinori Uehara, Hayato Kurasawa
  • Patent number: 10969920
    Abstract: According to an aspect, a display device includes: a first substrate; a second substrate facing the first substrate; a display function layer between the first substrate and the second substrate and displaying an image; first electrodes in a detection region of the first substrate; second electrodes in the detection region above the second substrate; a first electrode selection circuit in a peripheral region outside the detection region of the first substrate; and a second electrode selection circuit in a region overlapping with the peripheral region above the second substrate. The first electrode selection circuit selects some of the first electrodes, and supplies detection drive signals having phases determined on the basis of a certain code to the selected first electrodes. The second electrode selection circuit selects some of the second electrodes on the basis of a certain code, and couples the selected second electrodes to a single output signal line.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: April 6, 2021
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Toshinori Uehara, Yuji Suzuki
  • Patent number: 10970510
    Abstract: According to one embodiment, a sensor includes a first control line, a first signal line, a first detection switch, a common electrode, a first detection electrode, a first circuit and a second circuit. The common electrode is located above the first control line, the first signal line and the first detection switch, opposed to the first control line, the first signal line and the first detection switch. The first detection electrode is located above the common electrode. The first circuit and the second circuit are located under the common electrode, and are opposed to the common electrode.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: April 6, 2021
    Assignee: Japan Display Inc.
    Inventors: Hiroshi Mizuhashi, Gen Koide, Hayato Kurasawa, Toshio Soya, Fumitaka Gotoh
  • Patent number: 10969614
    Abstract: A detection device is provided. The detection device includes a first substrate; a plurality of detection electrodes disposed in a matrix configuration in a display region on a plane parallel to the first substrate; a second substrate facing the first substrate; a first conductive layer provided in a peripheral region located outside the display region in planar view; a polarizing plate provided above the second substrate; and a second conductive layer provided between the polarizing plate and the second substrate, wherein the second conductive layer is electrically coupled to the first conductive layer, and the first conductive layer is arranged to be part of an electrically connected loop around the display region.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: April 6, 2021
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Koji Ishizaki
  • Patent number: 10963663
    Abstract: A fingerprint sensor is provided and includes a substrate; sensor electrodes arranged in a matrix on the substrate; switches coupled to the sensor electrodes; a control line drive circuit; a signal line drive circuit; signal lines coupling the signal line drive circuit to the sensor electrodes through the switches; control lines transmitting a selection signal to the switches from the control line drive circuit; and a sensor drive electrode surrounding the matrix of the sensor electrodes, wherein a distance of the sensor drive electrode from a surface of the substrate is larger than a distance of the sensor electrodes from the surface of the substrate.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: March 30, 2021
    Assignee: Japan Display Inc.
    Inventors: Fumihito Shibano, Hiroshi Mizuhashi, Toshinori Uehara, Kimiyo Nonoyama, Hayato Kurasawa
  • Patent number: 10949014
    Abstract: A display apparatus includes a first substrate, a second substrate, a display functional layer, first electrodes, second electrodes, third electrodes, and a drive circuit. The second substrate faces the first substrate. The display functional layer is provided between the first substrate and the second substrate and used to display an image in a display area. The first electrodes are provided in the display area between the first substrate and the second substrate. The second electrodes are provided, facing the first electrodes, in the display area on the surface of the second substrate. The third electrodes are provided in a frame area on the outer side of the display area. The drive circuit supplies a first drive signal to at least one of the first electrodes and the second electrodes.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: March 16, 2021
    Assignee: Japan Display, Inc.
    Inventors: Hayato Kurasawa, Naoki Takada, Shota Hosaka, Toshihiko Tanaka, Chihiro Tanaka, Taiki Kasai
  • Patent number: 10942400
    Abstract: A liquid crystal includes first and second substrates, the first substrate including intersecting data lines and scan lines. A liquid crystal layer is sandwiched therebetween. Also, a plurality of sub-pixels districted by data lines and gate lines, and arranged along the long-axis and the short-axis directions in a matrix. A pixel electrode in the sub-pixels includes a central portion. A common electrode including linear electrodes arranged along the data lines and disposed with gaps therebetween. Sub-pixels are bent at the center portion, such that the linear electrodes or the gaps in both sides of the sub-pixels are inclined in opposite directions with respect to the long-axis direction. At least one of the linear electrodes or at least one of the gaps has a bent portion at the central portion of the respective pixel electrode. The common electrode is provided on liquid crystal layer side over the pixel electrode.
    Type: Grant
    Filed: July 11, 2019
    Date of Patent: March 9, 2021
    Assignee: Japan Display Inc.
    Inventors: Takao Atarashiya, Hayato Kurasawa
  • Patent number: 10936104
    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: Grant
    Filed: January 10, 2020
    Date of Patent: March 2, 2021
    Assignee: Japan Display Inc.
    Inventors: Chihiro Tanaka, Naoki Takada, Toshihiko Tanaka, Hayato Kurasawa, Koji Ishizaki, Tatsuya Wakimoto, Masaki Miyatake
  • Publication number: 20210042491
    Abstract: A display panel including a display function layer displaying an image in a display area, a cover member including a first face and a second face disposed on an opposite side of the first face and faces the display panel, and a fingerprint sensor including a plurality of first detection electrodes disposed in a sensor base and configured to detect unevenness of an object brought into contact with or approaching the first face of the cover member, a shield electrode disposed to face the plurality of first detection electrodes and configured to suppress a change in capacitance between the first detection electrodes and the shield electrode, and switching elements disposed in correspondence with the first detection electrodes, the fingerprint sensor being arranged between the cover member and the display panel and arranged to overlap with the display area when viewed in a direction perpendicular to the first face are included.
    Type: Application
    Filed: October 22, 2020
    Publication date: February 11, 2021
    Inventors: Toshinori UEHARA, Yoshitoshi KIDA, Hiroshi MIZUHASHI, Hayato KURASAWA, Yuji SUZUKI, Shoji HINATA, Toshiya YAMAZAKI
  • Patent number: 10915202
    Abstract: A display device with a touch sensor having a display function and a touch sensor function is provided. The display device includes a first substrate including a pixel electrode; a first electrode along a first direction; and a second substrate including a second electrode that includes patterns of electrodes along a second direction crossing the first direction and that faces the first electrode and the pixel electrode, wherein upon the display function being activated, the pixel electrode is supplied with a pixel signal, and the second electrode is supplied with common voltage, and upon the touch sensor function being activated, the first electrode is applied with a first signal and the second electrode is configured to receive the first signal to be a second signal as a touch detecting signal.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: February 9, 2021
    Assignee: Japan Display Inc.
    Inventors: Naosuke Furutani, Hayato Kurasawa, Makoto Hayashi
  • Publication number: 20210034218
    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: October 16, 2020
    Publication date: February 4, 2021
    Inventors: Koji ISHIZAKI, Hayato KURASAWA, Takeo KOITO
  • Patent number: 10908751
    Abstract: A detection device is provided and includes electrodes configured to detect a touch and including a plurality of first conductive thin wires and a plurality of second conductive thin wires, wherein the first conductive thin wires extend in a first direction, and include a first wire and a second wire which is adjacent to the first wire, the second conductive thin wires extend in a second direction intersecting the first direction, and include a third wire which intersects the first wire and the second wire, the first wire has a first slit, the second wire has a second slit, the third wire has a third slit between the first wire and the second wire, and the first slit, the second slit, and the third slit are arranged in a third direction which is different from the first direction and the second direction.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: February 2, 2021
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Hayato Kurasawa