Patents by Inventor Tadayoshi Katsuta

Tadayoshi Katsuta 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: 10444895
    Abstract: An input detection device includes a plurality of drive electrodes which are arranged in parallel to each other in plan view, and each of which has a pair of ends. At least one drive electrode among the plurality of drive electrodes is driven such that a first drive state where a first drive voltage is supplied to one end of the drive electrode and a second drive voltage different from the first drive voltage is supplied to the other end of the drive electrode and a second drive state where the second drive voltage is supplied to the one end and the first drive voltage is supplied to the other end temporally alternately occur.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: October 15, 2019
    Assignee: Japan Display Inc.
    Inventors: Tadayoshi Katsuta, Hiroshi Mizuhashi
  • Patent number: 10437407
    Abstract: An input detection device is provided with a plurality of drive electrodes, a metal electrode opposed to the plurality of drive electrodes and having a predetermined wiring pattern, and a light-shielding film. In plan view, a width of the wiring pattern of the metal electrode overlapped with a portion of the light-shielding film with a large width is larger than a width of the wiring pattern of the metal electrode overlapped with portions other than the portion of the light-shielding film with the large width.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: October 8, 2019
    Assignee: Japan Display Inc.
    Inventors: Tadayoshi Katsuta, Hiroshi Mizuhashi, Hayato Kurasawa
  • Publication number: 20190302509
    Abstract: According to one embodiment, a display device includes a base substrate, a switching element including a semiconductor layer, a power supply line, a pixel electrode electrically connected to the switching element, a capacitance electrode positioned between the base substrate and the pixel electrode and electrically connected to the power supply line, a first interlayer insulating film positioned between the pixel electrode and the capacitance electrode, a common electrode, and an electrophoretic element positioned between the pixel electrode and the common electrode. An edge of the capacitance electrode overlaps the pixel electrode over the entire periphery thereof.
    Type: Application
    Filed: March 22, 2019
    Publication date: October 3, 2019
    Applicant: Japan Display Inc.
    Inventors: Yoshitaka Ozeki, Tadayoshi Katsuta, Koji Ishizaki, Takahiro Takeuchi, Koshiro Moriguchi
  • Patent number: 10430012
    Abstract: Provided is a touch detection function-equipped display device that can be manufactured while suppressing an increase of price. A display device is provided with a pixel array including a plurality of pixels arranged in a matrix form, and drive electrodes each of which is arranged to extend in a first direction in the pixel array. A drive signal is supplied to a first area in a first drive electrode among the drive electrodes, and a ground voltage is supplied to a second area extending in the first direction with respect to the first area to generate a magnetic field in the first drive electrode according to the drive signal at a time of detecting an external proximity object.
    Type: Grant
    Filed: February 13, 2019
    Date of Patent: October 1, 2019
    Assignee: Japan Display Inc.
    Inventors: Hiroshi Mizuhashi, Gen Koide, Tadayoshi Katsuta
  • Patent number: 10429981
    Abstract: A detection device includes a substrate, first electrodes, second electrodes, and a conductor. The substrate has a first surface and a second surface opposite to the first surface. The first electrodes are provided in a display area of the substrate and detect the position of an object being in contact with or in proximity to the first surface side of the substrate or pressure of the object being in contact with the first surface side. The second electrodes are provided along at least one side of the outer periphery of the display area. The conductor is provided on the second surface side of the substrate apart from the substrate and generates an electrostatic capacitor between the conductor and the second electrodes.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: October 1, 2019
    Assignee: Japan Display Inc.
    Inventors: Koji Noguchi, Tadayoshi Katsuta, Yasuyuki Teranishi
  • Patent number: 10429973
    Abstract: The input detection device includes: a line having an end to which a driving signal is supplied and extending in a first direction; a plurality of drive electrodes extending in a second direction intersecting the first direction and arranged in parallel in the first direction; a selecting drive circuit selecting the drive electrode from the plurality of drive electrodes and connecting an end of the selected drive electrode to the line; a driving signal circuit supplying the driving signal to the end of the line; and a plurality of line patterns connected to each drive electrode. A line density of line patterns connected to a drive electrode connected to be close to the end of the line is smaller than a line density of line patterns connected to another drive electrode connected to be far from the end of the line.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: October 1, 2019
    Assignee: Japan Display Inc.
    Inventor: Tadayoshi Katsuta
  • Patent number: 10409103
    Abstract: A display device includes a display region, a peripheral region outside the display region, a control circuit, driving circuits, a clock line connecting the control circuit to one of the driving circuits and in which a first clock signal is supplied, and another clock line connecting the control circuit to the other of the driving circuits and in which a second clock signal is supplied. A light shielding layer includes extension portions each extending along a Y direction, and bent portions between the extension portions. A length of one of the extension portions is longer than a length of the other of the extension portions. In plan view, one of the bent portions overlaps with one of the clock lines, and the other of the bent portions is located between termination portions of the clock lines.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: September 10, 2019
    Assignee: Japan Display Inc.
    Inventor: Tadayoshi Katsuta
  • Patent number: 10409102
    Abstract: A light shielding layer overlapping with a peripheral region of a display device includes extension portions each extending along a Y direction, bent portions located between the extension portions, and another extension portion located between the bent portions. In a region overlapping with the another extension portion, an enable line (first potential supply line), which supplies a potential to a plurality of scanning signal lines via a driving circuit (first driving circuit), goes through a wiring layer (first wiring layer) and another wiring layer (second wiring layer) made of a material having resistivity lower than that of the wiring layer.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: September 10, 2019
    Assignee: Japan Display Inc.
    Inventor: Tadayoshi Katsuta
  • Patent number: 10402008
    Abstract: An input detection device includes a plurality of drive electrodes, a first wiring that supplies a first voltage to the plurality of drive electrodes, and a second wiring that supplies a second voltage different from the first voltage, to the plurality of drive electrodes. Input detection through an electromagnetic induction method is performed through a magnetic field generated by supplying the first voltage and the second voltage to the plurality of drive electrodes, and the first voltage and the second voltage supplied to the first wiring and the second wiring are direct-current voltages.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: September 3, 2019
    Assignee: Japan Display Inc.
    Inventor: Tadayoshi Katsuta
  • Patent number: 10386668
    Abstract: In, for example, such an in-cell touch panel of an electromagnetic induction method as to generate a magnetic field for touch detection in a display device, provided is an input detection device in which even an end portion of a display area can generate the same magnetic field as that generated at a center of the display area. The input detection device includes a plurality of first drive electrodes placed in a detection area; a second drive electrode placed in a frame area; and a second drive circuit driving the second drive electrode. In addition, the plurality of first drive electrodes and the second drive electrode extend in a first direction to be arranged in a second direction crossing the first direction, and the second drive electrode and the second drive circuit are arranged in the first direction in the frame area.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: August 20, 2019
    Assignee: Japan Display Inc.
    Inventors: Tadayoshi Katsuta, Hiroshi Mizuhashi
  • Patent number: 10379415
    Abstract: According to an aspect, a display apparatus includes: a display panel including a plurality of pixels each including a pixel capacitor and a pixel transistor, a scanning line that is coupled to the respective pixels and is configured to receive a scan signal, and a video signal line that is coupled to the respective pixels and is configured to receive a video signal; and a driver configured to drive the display panel. The pixel transistor includes: at least one N-channel metal oxide semiconductor (NMOS) transistor coupled between the video signal line and the pixel capacitor; and a P-channel metal oxide semiconductor (PMOS) transistor coupled in parallel with the NMOS transistor.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: August 13, 2019
    Assignee: Japan Display Inc.
    Inventor: Tadayoshi Katsuta
  • Patent number: 10373577
    Abstract: According to an aspect, a display device includes: a plurality of pixels aligned in row and column directions, each of the pixels including a drive element; a plurality of scan lines each coupled with the drive elements included in the pixels aligned in the row direction to transmit thereto a scan signal for selecting the pixels row by row; a plurality of signal lines each coupled with the drive elements included in the pixels aligned in the column direction to write display data; and a display control unit. The display control unit alternately repeats a display period and a stop period. In a latter term of the stop period, display control unit provides the display data written in the respective pixels in a row that has been selected during the display period immediately before the stop period, to the signal lines corresponding to the respective pixels.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: August 6, 2019
    Assignee: Japan Display Inc.
    Inventors: Tadayoshi Katsuta, Hiroshi Mizuhashi
  • Patent number: 10359893
    Abstract: A display device with a touch sensor includes: plural display pixel electrodes; a common electrode arranged opposite to the display pixel electrodes; a display function layer having an image display function; a display control circuit performing image display control so as to fulfill the display function of the display function layer by applying a voltage for display between the display pixel electrodes and the common electrode based on an image signal; and a touch detection electrode provided opposite to the common electrode and forming capacitance between the touch detection electrode and the common electrode, wherein a drive voltage for display applied to the common electrode by the display control circuit is used as a drive signal for the touch sensor, and a gate potential of TFT circuits included in the display pixel electrodes is increased during a period when the drive signal for the touch sensor is applied.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: July 23, 2019
    Assignee: Japan Display Inc.
    Inventors: Takeya Takeuchi, Hiroshi Mizuhashi, Tadayoshi Katsuta, Takehiro Shima
  • Publication number: 20190220140
    Abstract: According to an aspect, a display device with a touch detection function includes: a display region; a plurality of drive electrodes; a control device; a touch detection electrode that is opposed to the drive electrodes and forms capacitance with respect to the drive electrodes; power supply wiring arranged in a frame region positioned outside the display region; and a plurality of drive electrode scanning units that select the drive electrode to be coupled to the power supply wiring. When the drive electrode scanning unit simultaneously selects the drive electrodes of which number is equal to or larger than the number of pieces of the power supply wiring, the control device supplies a touch driving signal that is multiplexed based on a certain code to each of the selected drive electrodes.
    Type: Application
    Filed: March 26, 2019
    Publication date: July 18, 2019
    Inventors: Hiroshi Mizuhashi, Tadayoshi Katsuta, Yoshitoshi Kida
  • Publication number: 20190204644
    Abstract: In, for example, such an in-cell touch panel of an electromagnetic induction method as to generate a magnetic field for touch detection in a display device, provided is an input detection device in which even an end portion of a display area can generate the same magnetic field as that generated at a center of the display area. The input detection device includes a plurality of first drive electrodes placed in a detection area; a second drive electrode placed in a frame area; and a second drive circuit driving the second drive electrode. In addition, the plurality of first drive electrodes and the second drive electrode extend in a first direction to be arranged in a second direction crossing the first direction, and the second drive electrode and the second drive circuit are arranged in the first direction in the frame area.
    Type: Application
    Filed: March 12, 2019
    Publication date: July 4, 2019
    Inventors: Tadayoshi KATSUTA, Hiroshi MIZUHASHI
  • Patent number: 10339884
    Abstract: According to an aspect, a display device includes: a display region in which a plurality of pixels are arranged in a matrix; a plurality of signal lines that extend in a second direction in the display region; a vertical drive circuit that is coupled to first ends of the scanning lines and applies a vertical scanning pulse to the first ends to select each row of the pixels in the display region; a horizontal drive circuit that performs a display operation of supplying an image signal to each of the pixels in the row selected by the vertical drive circuit through the signal lines; and a plurality of switches that are coupled to second ends of the scanning lines respectively. Each of the switches supplies the same potential as that supplied to the first ends by the vertical drive circuit to the second end corresponding thereto in an idle period.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: July 2, 2019
    Assignee: Japan Display Inc.
    Inventor: Tadayoshi Katsuta
  • Publication number: 20190179460
    Abstract: Provided is a touch detection function-equipped display device that can be manufactured while suppressing an increase of price. A display device is provided with a pixel array including a plurality of pixels arranged in a matrix form, and drive electrodes each of which is arranged to extend in a first direction in the pixel array. A drive signal is supplied to a first area in a first drive electrode among the drive electrodes, and a ground voltage is supplied to a second area extending in the first direction with respect to the first area to generate a magnetic field in the first drive electrode according to the drive signal at a time of detecting an external proximity object.
    Type: Application
    Filed: February 13, 2019
    Publication date: June 13, 2019
    Inventors: Hiroshi MIZUHASHI, Gen KOIDE, Tadayoshi KATSUTA
  • Publication number: 20190155434
    Abstract: A performance of a display device having an input device is improved. A display device includes: an electro-optical layer; a first driving electrode and a second driving electrode which drives the electro-optical layer; a driver chip which outputs a video signal; a switch circuit which is arranged outside the driver chip, which selects a potential to be supplied to the second driving electrode, and which includes a first switch element and a second switch element; a shift register circuit connected to the switch circuit; and a detection circuit which detects that an object is close or in contact. Each of the first switch element and the second switch element is selectively turned ON or OFF by the shift register circuit. The detection circuit is electrically connected to the first switch element and the second switch element.
    Type: Application
    Filed: January 18, 2019
    Publication date: May 23, 2019
    Inventors: Tadayoshi Katsuta, Koji Noguchi, Daisuke Ito, Yasuyuki Teranishi
  • Patent number: 10289234
    Abstract: According to an aspect, a display device with a touch detection function includes: a display region; a plurality of drive electrodes; a control device; a touch detection electrode that is opposed to the drive electrodes and forms capacitance with respect to the drive electrodes; power supply wiring arranged in a frame region positioned outside the display region; and a plurality of drive electrode scanning units that select the drive electrode to be coupled to the power supply wiring. when the drive electrode scanning unit simultaneously selects the drive electrodes of which number is equal to or larger than the number of pieces of the power supply wiring, the control device supplies a touch driving signal that is multiplexed based on a certain code to each of the selected drive electrodes.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: May 14, 2019
    Assignee: Japan Display Inc.
    Inventors: Hiroshi Mizuhashi, Tadayoshi Katsuta, Yoshitoshi Kida
  • Publication number: 20190138143
    Abstract: Provided is an input detection device capable of suppressing a change in detection sensitivity depending on a position. The input detection device includes: signal wirings having end portions, and arranged so as to extend in a first direction; drive electrodes each extending in a second direction crossing the first direction, and arranged in parallel to the first direction; a plurality of first switches arranged between the end portions of the drive electrodes and the signal wirings; a drive signal circuit supplying a drive signal to the end portions; and a selection circuit controlling the first switches in detecting proximity of an external object.
    Type: Application
    Filed: January 2, 2019
    Publication date: May 9, 2019
    Inventor: Tadayoshi KATSUTA