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).

  • Publication number: 20170371466
    Abstract: A display device including a substrate, a plurality of pixel electrodes arranged in a form of a matrix in a plane parallel with the substrate, a display functional layer exerting an image display function on a basis of an image signal supplied to the plurality of pixel electrodes, a driving electrode opposed to the plurality of pixel electrodes, and a plurality of detecting electrodes arranged in a form of a plane opposed to the driving electrode, separated and arranged at a pitch of a natural number multiple of an arrangement pitch of the pixel electrodes in one direction in the arrangement plane, and each capacitively coupled with the driving electrode.
    Type: Application
    Filed: September 7, 2017
    Publication date: December 28, 2017
    Inventors: Koji Ishizaki, Kouji Noguchi
  • Publication number: 20170371467
    Abstract: A display device includes: a plurality of pixel electrodes each of which is provided in each of a plurality of sub-pixels arranged in a display region; a driving electrode provided so as to overlap the plurality of pixel electrodes when seen in a plan view; a plurality of detecting electrodes provided so as to overlap the driving electrode when seen in a plan view; and a dummy electrode provided apart from the detecting electrodes. The detecting electrodes and the dummy electrode include a metal layer or an alloy layer. A ratio of total sum of areas of portions of the plurality sub-pixels which overlap any of the detecting electrodes and the dummy electrode when seen in a plan view to total sum of areas of the plurality of sub-pixels is 1 to 22%.
    Type: Application
    Filed: September 8, 2017
    Publication date: December 28, 2017
    Inventors: Hayato Kurasawa, Koji Ishizaki, Takeo Koito
  • Publication number: 20170322652
    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 8Q/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: July 26, 2017
    Publication date: November 9, 2017
    Inventors: Masanobu Ikeda, Koji Ishizaki, Hayato Kurasawa, Yoshihiro Watanabe, Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide
  • Publication number: 20170315660
    Abstract: A capacitance-type touch panel, allowing disturbance noise and touch detection time to be reduced and having a simple configuration, is provided. The capacitance-type touch panel including: a plurality of drive electrodes each having a strip shape; a drive control circuit performing control such that a drive signal for touch detection is selectively applied to the drive electrodes; a plurality of touch detection electrodes arranged to intersect with the drive electrodes in such a manner that capacitance is formed in each intersecting part, and each outputting a detection signal in synchronization with the drive signal; and a detection circuit detecting an external proximity object based on the detection signal. The drive control circuit controls application of the drive signal in such a manner that the detection signal is a polarity-alternating signal including a positive-negative asymmetrical signal component which is due to presence of the external proximity object.
    Type: Application
    Filed: March 24, 2017
    Publication date: November 2, 2017
    Applicant: Japan Display, Inc.
    Inventors: Kouji Noguchi, Tsutomu Harada, Yoshitoshi Kida, Takayuki Nakanishi, Koji Ishizaki, Takeya Takeuchi
  • Publication number: 20170315664
    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: July 18, 2017
    Publication date: November 2, 2017
    Inventors: Koji ISHIZAKI, Hayato KURASAWA, Takeo KOITO
  • Patent number: 9791984
    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 unit pixels are arranged in a matrix, each of unit pixels including subpixels. The electrode includes conductive line fragments arranged on a detection surface, and is configured to detect a contact of an object to the surface. The detection electrode has an electrode pattern formed of the line fragments on a grid defined by first and second lines. Extending directions of the first and second lines are tilted based on a first and second unit length of the unit pixel in the first and second direction.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: October 17, 2017
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Koji Ishizaki
  • Patent number: 9791973
    Abstract: According to one embodiment, a sensor-equipped display device includes a display panel including a sensor driving electrode, a detection electrode opposed to the sensor driving electrode, and a lead line electrically connected to the detection electrode, and a driving unit configured to supply a sensor driving signal to the sensor driving electrode, and to read out from the detection electrode a detection signal based on the sensor driving signal supplied to the sensor driving electrode. The detection electrode includes a large-width portion connected to the lead line and has a first width, and a main body portion which is continuous with the large-width portion, extends in a direction away from the lead line, and has a second width that is less than the first width.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: October 17, 2017
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Hiroshi Mizuhashi, Koji Ishizaki
  • Patent number: 9791951
    Abstract: Disclosed herein is a display device including a substrate, a plurality of pixel electrodes arranged in a form of a matrix in a plane parallel with the substrate, a display functional layer exerting an image display function on a basis of an image signal supplied to the plurality of pixel electrodes, a driving electrode opposed to the plurality of pixel electrodes, and a plurality of detecting electrodes arranged in a form of a plane opposed to the driving electrode, separated and arranged at a pitch of a natural number multiple of an arrangement pitch of the pixel electrodes in one direction in the arrangement plane, and each capacitively coupled with the driving electrode.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: October 17, 2017
    Assignee: JAPAN DISPLAY INC.
    Inventors: Koji Ishizaki, Kouji Noguchi
  • Patent number: 9791972
    Abstract: According to one embodiment, a sensor-equipped display device includes a display panel, first driver, and second driver. The display panel includes a common electrode, a pixel electrode, a detection electrode, a connection line and lead line. The first driver supplies a common driving signal to the common electrode during a display drive time and supplies a sensor driving signal to the common electrode during a sensing drive time. The second driver detects a sensor output value during the sensing drive time. The lead line and the common electrode are apart from each other with a certain gap at least during the sensing drive time.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: October 17, 2017
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Hiroshi Mizuhashi, Koji Ishizaki, Yoshihiro Watanabe, Masanobu Ikeda
  • Publication number: 20170285802
    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: Application
    Filed: April 3, 2017
    Publication date: October 5, 2017
    Inventors: Koji ISHIZAKI, Hayato KURASAWA
  • Publication number: 20170285852
    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: June 15, 2017
    Publication date: October 5, 2017
    Inventors: Hayato Kurasawa, Koji Ishizaki, Kohei Azumi
  • Publication number: 20170285826
    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: June 23, 2017
    Publication date: October 5, 2017
    Inventors: Hayato Kurasawa, Koji Ishizaki
  • Publication number: 20170269417
    Abstract: Detection electrode wirings formed by an ITO film have a high resistance and the detection capability thereof is degraded with the increase of the size and/or resolution. A manufacturing method of a display device includes: (a) arranging liquid crystal between an array substrate and a counter substrate; (b) forming a metal layer and a low-reflection layer on the counter substrate after the step (a); (c) applying an overcoat film onto the metal layer and the low-reflection layer; and (d) curing the overcoat film to form a protection layer. The step (d) cures the overcoat film with light and heat.
    Type: Application
    Filed: June 5, 2017
    Publication date: September 21, 2017
    Inventors: Toshimasa ISHIGAKI, Daisuke SONODA, Tatsuya IDE, Koji ISHIZAKI, Yoshihiro WATANABE, Hayato KURASAWA, Masanobu IKEDA
  • Patent number: 9760211
    Abstract: According to one embodiment, a sensor-equipped display device includes a display panel, first driver, and second driver. The display panel includes a common electrode, a pixel electrode, a detection electrode, a connection line and lead line. The first driver supplies a common driving signal to the common electrode during a display drive time and supplies a sensor driving signal to the common electrode during a sensing drive time. The second driver detects a sensor output value during the sensing drive time. The lead line and the common electrode are apart from each other with a certain gap at least during the sensing drive time.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: September 12, 2017
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Hiroshi Mizuhashi, Koji Ishizaki, Yoshihiro Watanabe, Masanobu Ikeda
  • Patent number: 9753581
    Abstract: According to one embodiment, a sensor-equipped display device includes a display panel including a sensor driving electrode, a detection electrode opposed to the sensor driving electrode, and a lead line electrically connected to the detection electrode, and a driving unit configured to supply a sensor driving signal to the sensor driving electrode, and to read out from the detection electrode a detection signal based on the sensor driving signal supplied to the sensor driving electrode. The detection electrode includes a large-width portion connected to the lead line and has a first width, and a main body portion which is continuous with the large-width portion, extends in a direction away from the lead line, and has a second width that is less than the first width.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: September 5, 2017
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Hiroshi Mizuhashi, Koji Ishizaki
  • Patent number: 9746977
    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: Grant
    Filed: June 17, 2015
    Date of Patent: August 29, 2017
    Assignee: Japan Display Inc.
    Inventors: Masanobu Ikeda, Koji Ishizaki, Hayato Kurasawa, Yoshihiro Watanabe, Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide
  • Patent number: 9746956
    Abstract: A touch detector capable of achieving high position resolution while improving detection sensitivity to a touch is provided. The touch detector includes: a plurality of drive electrodes arranged side by side to extend in one direction; a detection electrode extending in a direction orthogonal to a direction where the drive electrodes extend, and arranged to form a capacitance at each of intersections with the drive electrodes; and a scanning drive section sequentially selecting a predetermined plural number of target electrodes from the plurality of drive electrodes in a time-divisional manner, and applying a touch detection drive signal with a plurality of pulse waveforms for detecting an external adjacent object to the selected target electrodes to perform a scanning drive. A scanning pitch in the scanning drive is smaller than the total width of the plural number of selected target electrodes.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: August 29, 2017
    Assignee: Japan Display Inc.
    Inventors: Kohei Azumi, Yoshitoshi Kida, Koji Noguchi, Koji Ishizaki
  • Publication number: 20170242546
    Abstract: A touch sensor includes a sensor electrode having an electrostatic capacitance for touch detection, and a touch detection circuit detecting a contact or proximity position of an object on the basis of a detection signal obtained from the sensor electrode by applying a touch sensor drive signal to the sensor electrode. The sensor electrode is split into plural stripe-like electrode patterns. Applying the touch sensor drive signal to part of the electrode patterns forms a drive line at that time. The touch detection circuit performs a detection on the basis of a first detection signal obtained from a first drive line formed in a first period, and a second detection signal obtained from a second drive line formed in a second period.
    Type: Application
    Filed: May 9, 2017
    Publication date: August 24, 2017
    Inventors: Takeya Takeuchi, Koji Noguchi, Koji Ishizaki, Takayuki Nakanishi, Yasuyuki Teranishi
  • Patent number: 9740328
    Abstract: A display device with a touch detecting function is disclosed herein. In an embodiment, the display device includes a substrate, a display area in which pixels each composed of a plurality of color areas are arranged in a matrix on a plane parallel to a surface of the substrate, a touch detection electrode including a first conductive thin wire extending in a first direction on a plane parallel to the surface of the substrate, a dummy electrode provided to an area in which the first conductive thin wire is not arranged in a direction perpendicular to the surface of the substrate and including a plurality of second conductive thin wires, a drive electrode made of a translucent material to which a display drive signal is applied, the drive electrode being arranged on the substrate, and a display functional layer having a function to display an image on the display area.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: August 22, 2017
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Hayato Kurasawa, Takeo Koito
  • Patent number: 9733507
    Abstract: Warpage deformation which is caused when substrates having mutually different linear expansion coefficients are bonded to sandwich a display functional layer is suppressed. A display device has a first substrate, a second substrate bonded to the first substrate so as to be opposed to the first substrate, and a liquid crystal layer serving as a display functional layer disposed between the first substrate and the second substrate. Also, a first linear expansion coefficient of the first substrate provided in the display device is larger than a second linear expansion coefficient of the second substrate, and a first thickness of the first substrate is larger than a second thickness of the second substrate.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: August 15, 2017
    Assignee: Japan Display Inc.
    Inventors: Yoshihiro Watanabe, Masanobu Ikeda, Takeo Koito, Koji Ishizaki, Hayato Kurasawa