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: 20160139725
    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: May 1, 2015
    Publication date: May 19, 2016
    Inventors: Kouji NOGUCHI, Tsutomu HARADA, Yoshitoshi KIDA, Takayuki NAKANISHI, Koji ISHIZAKI, Takeya TAKEUCHI
  • Patent number: 9304639
    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: November 18, 2013
    Date of Patent: April 5, 2016
    Assignee: Japan Display Inc.
    Inventors: Koji Ishizaki, Hayato Kurasawa, Kohei Azumi
  • Patent number: 9298294
    Abstract: A display apparatus includes: a display face; a display function layer adapted to vary display on the display face in response to an inputted image signal; a plurality of driving electrodes disposed separately in one direction; a detection scanning control section configured to apply a detection driving voltage to some of the plural driving electrodes and carry out detection driving scanning while shifting an application object of the detection driving voltage in the one direction on the display face and then control the detection driving scanning such that jump shift of carrying out shift with a pitch of twice or more times a driving electrode pitch is included; and a plurality of sensor lines disposed separately in a direction different from the one direction and responding to touch or proximity of a detection object with or to the display face to exhibit an electric variation.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: March 29, 2016
    Assignee: Japan Display, Inc.
    Inventors: Takeya Takeuchi, Kouji Noguchi, Koji Ishizaki, Yasuyuki Teranishi, Takayuki Nakanishi
  • Patent number: 9298328
    Abstract: According to an aspect, a display device with a touch detection function includes a display area and a touch detection electrode that includes thin wire segments having first and second ends. Thin wire segments include a thin wire segment extending in a direction different from a pixel arrangement direction in which color regions having the highest human visibility are arranged. The second end is located away from the first end in a direction toward a target position that is distant from the first end in a pixel orthogonal direction by N times of a maximum length of one of the pixels in the pixel orthogonal direction, and in the pixel arrangement direction by M times of a maximum length of one of the pixels in the pixel arrangement direction. Each of N and M is an integer of 2 or larger. N and M are different from each other.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: March 29, 2016
    Assignee: Japan Display Inc.
    Inventors: Hayato Kurasawa, Koji Ishizaki, Takeo Koito
  • Patent number: 9292126
    Abstract: According to an aspect, a display device with a touch detection function includes: a variable focus lens unit that includes a first substrate including a first electrode, a second substrate including a second electrode, and a variable focus layer that is provided between the first substrate and the second substrate; a display unit including a display region that displays an image via the variable focus lens unit; a drive electrode that is arranged in the display unit or at a position opposed to the display region, and divided into a plurality of pieces; and a touch detection unit configured to detect a position of a proximity object using one of the first electrode and the second electrode as a touch detection electrode based on change in capacitance with respect to the drive electrode.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: March 22, 2016
    Assignee: Japan Display Inc.
    Inventors: Takeo Koito, Koji Ishizaki, Hayato Kurasawa
  • Publication number: 20160062512
    Abstract: A manufacturing process of an electrode substrate includes a step of forming a protective layer so as to cover a conductor pattern by applying raw material liquid discharged as droplets to an upper surface of a substrate in a first region and a second region of the upper surface of the substrate. At this time, an application amount of the raw material liquid per unit area in the second region is made smaller than an application amount of the raw material liquid per unit area in the first region, so that an average film thickness of the protective layer of a portion formed in the second region is made smaller than an average film thickness of the protective layer of a portion formed in the first region.
    Type: Application
    Filed: August 20, 2015
    Publication date: March 3, 2016
    Inventors: Koji Ishizaki, Hayato Kurasawa, Masanobu Ikeda, Yoshihiro Watanabe, Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide
  • Patent number: 9274653
    Abstract: A touch detection device includes: a detection surface; a plurality of sensor lines formed from a plurality of types of wiring lines having a different line capacitance; and a touch detection unit which detects an electric variation generated in a plurality of the sensor lines in response to touch or proximity of a detection target object to the detection surface, wherein the touch detection unit has an operational circuit for generating a detection signal representing the electric variation by performing an operation process using a line capacitance ratio for a plurality of outputs from a plurality of types of the sensor lines neighboring to one another with a different line capacitance.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: March 1, 2016
    Assignee: Japan Display, Inc.
    Inventors: Koji Ishizaki, Kouji Noguchi, Takeya Takeuchi, Takayuki Nakanishi, Yasuyuki Teranishi
  • Publication number: 20160054608
    Abstract: A first electrode 30 for the touch panel is formed on an outer side of a counter substrate 200, and the protection film 210 is formed over the first electrode 30 to cover it. A defect 211 in the protection film 210 is filled in with another protection film 210 by inkjet coating. The surface of the protection film 210 is rubbed to a rough surface finish. The polarization plate 220 is attached to the rough surface of the protection film 210 via an adhesive material 221. Since the defective region is repaired by the formation of the protection film 210, corrosion of the first electrode (wiring) 30 due to the presence of the adhesive material 221 can be prevented, and since the surface of the second protection film 210 is made rough, a resulting increase in adhering surface area enhances the adhesion for attaching the polarization plate 220.
    Type: Application
    Filed: August 24, 2015
    Publication date: February 25, 2016
    Inventors: Daisuke SONODA, Tatsuya IDE, Toshimasa ISHIGAKI, Masanobu IKEDA, Koji ISHIZAKI, Hayato KURASAWA, Yoshihiro WATANABE
  • Publication number: 20160054607
    Abstract: A display apparatus includes a first substrate, a second substrate facing the first substrate, lead wirings provided on the first substrate or the second substrate and a first insulator part provided on an upper surface of the second substrate. The lead wirings are arranged in a peripheral region when seen in a plan view and the first insulator part is arranged so as to overlap a display region when seen in a plan view. Second insulator parts or spaces with a permittivity lower than a permittivity of the first insulator part are provided at sides of the first insulator part. The second insulator parts or the spaces are arranged so as to overlap the lead wirings in the peripheral region when seen in a plan view.
    Type: Application
    Filed: August 6, 2015
    Publication date: February 25, 2016
    Inventors: Koji Ishizaki, Masanobu Ikeda, Hayato Kurasawa, Yoshihiro Watanabe
  • Publication number: 20160018928
    Abstract: According to an aspect, a display device with a touch detection function includes a display area and a touch detection electrode that includes thin wire segments having first and second ends. Thin wire segments include a thin wire segment extending in a direction different from a pixel arrangement direction in which color regions having the highest human visibility are arranged. The second end is located away from the first end in a direction toward a target position that is distant from the first end in a pixel orthogonal direction by N times of a maximum length of one of the pixels in the pixel orthogonal direction, and in the pixel arrangement direction by M times of a maximum length of one of the pixels in the pixel arrangement direction. Each of N and M is an integer of 2 or larger. N and M are different from each other.
    Type: Application
    Filed: September 29, 2015
    Publication date: January 21, 2016
    Inventors: Hayato KURASAWA, Koji ISHIZAKI, Takeo KOITO
  • Publication number: 20160011717
    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: Application
    Filed: September 22, 2015
    Publication date: January 14, 2016
    Inventors: Koji ISHIZAKI, Hayato KURASAWA, Takeo KOITO
  • Publication number: 20160011448
    Abstract: According to one embodiment, a display device comprises a display panel, a metal layer, a coat layer, a cover member and an adhesive layer. The display panel comprises a principal surface including a display area in which an image is displayed. The metal layer is provided on the principal surface. The coat layer covers the metal layer and is in contact with the principal surface. The cover member faces the coat layer. The adhesive layer bonds the cover member to the coat layer and continuously covers the principal surface and at least a part of an outer edge of the coat layer.
    Type: Application
    Filed: July 14, 2015
    Publication date: January 14, 2016
    Inventors: Yoshihiro WATANABE, Masanobu IKEDA, Hayato KURASAWA, Koji ISHIZAKI
  • Publication number: 20150378507
    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: September 10, 2015
    Publication date: December 31, 2015
    Inventors: Hayato Kurasawa, Koji Ishizaki, Kohei Azumi
  • Publication number: 20150370370
    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: June 17, 2015
    Publication date: December 24, 2015
    Inventors: Masanobu Ikeda, Koji Ishizaki, Hayato Kurasawa, Yoshihiro Watanabe, Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide
  • Publication number: 20150362774
    Abstract: The detection speed of a touch is improved and the reliability of a touch panel electrode formed on the outer side of a glass substrate is improved. A liquid crystal display device is provided in which a first electrode is formed on the outer side of a counter substrate as the first electrode is extended in a first direction. A second electrode extended in a direction perpendicular to the first direction is formed on the inner side of a TFT substrate. A touch panel function is provided on a liquid crystal display panel. The first electrode is formed of a metal or alloy. A protective film is formed to cover the first electrode. On the outer side of the first substrate, a groove is formed between the end portion of the protective film and the first electrode in parallel with the edge of the counter substrate.
    Type: Application
    Filed: June 9, 2015
    Publication date: December 17, 2015
    Inventors: Tatsuya IDE, Daisuke Sonoda, Toshimasa Ishigaki, Masanobu Ikeda, Koji Ishizaki, Hayato Kurasawa, Yoshihiro Watanabe
  • Publication number: 20150355752
    Abstract: A sensor-equipped display device is provided and includes a display panel and a detection electrode. The display panel includes a display area in which a plurality of pixels are arranged. The detection electrode includes an electrode pattern having conductive line fragments arranged on a detection surface which is parallel to the display area, wherein the electrode pattern includes a connection point at which ends of three line fragments are connected together.
    Type: Application
    Filed: June 10, 2015
    Publication date: December 10, 2015
    Inventors: Hayato KURASAWA, Koji ISHIZAKI
  • Publication number: 20150355510
    Abstract: According to one embodiment, a sensor-equipped display device comprises 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: Application
    Filed: June 9, 2015
    Publication date: December 10, 2015
    Inventors: Hayato KURASAWA, Koji ISHIZAKI
  • Publication number: 20150355751
    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: Application
    Filed: June 9, 2015
    Publication date: December 10, 2015
    Inventors: Hayato KURASAWA, Koji ISHIZAKI
  • Publication number: 20150346531
    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 1, 2015
    Publication date: December 3, 2015
    Inventors: Toshimasa ISHIGAKI, Daisuke SONODA, Tatsuya IDE, Koji ISHIZAKI, Yoshihiro WATANABE, Hayato KURASAWA, Masanobu IKEDA
  • Publication number: 20150338956
    Abstract: [PROBLEM] To reduce a time constant of an electric circuit including driving electrodes and detecting electrodes in a display provided with an input device, and reduce a temperature variation ratio of the time constant. [SOLVING MEANS] The display 1 includes driving electrodes COML provided along an X axis direction when seen in a plan view, buffer TFT elements Trb serially connected to the driving electrodes COML, and a plurality of detecting electrodes TDL respectively provided to intersect with the driving electrodes COML when seen in a plan view and aligned in the X axis direction. A temperature coefficient of resistance of a sum of an ON resistance of the buffer TFT elements Trb and a resistance of the driving electrodes COML is negative, each of the specific resistances of the plurality of detecting electrodes TDL is not more than 40 ?? cm, and each of the temperature coefficients of resistance of the plurality of detecting electrodes TDL is 1×10?3 to 5×10?3K?1.
    Type: Application
    Filed: May 5, 2015
    Publication date: November 26, 2015
    Inventors: Masanobu Ikeda, Koji Ishizaki, Hayato Kurasawa