Patents by Inventor Kentaro Agata

Kentaro Agata 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: 9046725
    Abstract: Inspection pads are reduced when there is a need to input a plurality of control signals as inspection control signals. A display device includes: an integrated circuit; a first substrate on which a plurality of signal lines that respectively input the control signals to the integrated circuit, and an inspection pad are formed; and a driver circuit that that is mounted on the first substrate and connected to the plurality of signal lines. The plurality of signal lines include first and second signal lines adjacent to each other. The inspection pad is formed on the one signal line. The second signal line is connected to the inspection pad through a switch element. At the time of inspection, the switch element turns on, and the same control signal is input to the first and second signal lines from the inspection pad.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: June 2, 2015
    Assignee: JAPAN DISPLAY INC.
    Inventor: Kentaro Agata
  • Publication number: 20150062473
    Abstract: This invention envisages having flexible wiring substrate terminals serving to connect with the wires for preventing dielectric breakdown caused by static electricity during the manufacturing process, and reducing the number of the flexible wiring substrate terminals. On a mother TFT substrate, signal lines extend over each liquid crystal cell in a manner flanking a scribe line between the adjacent liquid crystal cells. The signal lines of each liquid crystal cell are connected with connecting lines striding the scribe line. This reduces the number of static electricity countermeasure wires extending from the flexible wiring substrate terminals of each liquid crystal cell. Once completed, the individual liquid crystal cells are separated from one another, with no adverse effects caused by the connecting lines.
    Type: Application
    Filed: September 5, 2014
    Publication date: March 5, 2015
    Inventors: Tomonori NISHINO, Syou YANAGISAWA, Kentaro AGATA, Hiroyuki ABE, Takayuki SUZUKI
  • Publication number: 20140362318
    Abstract: A multiple circuit board includes a board having a plurality of product regions respectively corresponding to a plurality of array boards and an out-of-product region, out-of-product wires provided in the out-of-product region, waveform wires electrically connected to the out-of-product wires and extending to depict waveforms to alternately pass inside and outside of the respective product regions, circuit elements provided in respective display regions of the plurality of product regions, scanning circuits provided adjacent to the respective display regions of the plurality of product regions, and a plurality of scanning lines extending from the scanning circuits to both sides in each of the product regions and connecting to the circuit elements at one side and connecting to the waveform wires inside the product region at the other side.
    Type: Application
    Filed: May 6, 2014
    Publication date: December 11, 2014
    Applicant: Japan Display Inc.
    Inventor: Kentaro AGATA
  • Publication number: 20140217412
    Abstract: A display device includes a display area and a terminal area formed outside the display area. The display area has a plurality of scanning lines and a plurality of video signal lines that cross the scanning lines. The terminal area has a first terminal having a semiconductor chip connected thereto, a first line, a second line, and an inspection thin-film transistor. The inspection thin-film transistor has a gate electrode connected to the first line, a source electrode connected to the second line, and a drain electrode. The first terminal is connected to any of the plurality of scanning lines and the plurality of video signal lines.
    Type: Application
    Filed: February 5, 2014
    Publication date: August 7, 2014
    Applicant: Japan Display Inc.
    Inventors: Syou YANAGISAWA, Nobuyuki ISHIGE, Tomonori NISHINO, Kentaro AGATA
  • Publication number: 20140131719
    Abstract: This invention aims at reducing the probability of short-circuiting between terminals in a display device in which an IC driver is connected by COG. Terminals for connection with the IC driver are formed in a terminal region of a TFT substrate. The terminals are each comprised of a terminal metal, a first through-hole formed in a first insulation film, a second through-hole formed in a second insulation film, a first ITO formed in the first through-hole and being in contact with the terminal metal, and a second ITO formed over the first ITO. The second ITO is formed within an area where the second ITO is in contact with the first ITO but is not formed outside the second through-hole. This ensures that the distance between the ITOs of the adjacent terminals can be enlarged, whereby the probability of short-circuiting between the terminals can be lowered.
    Type: Application
    Filed: November 5, 2013
    Publication date: May 15, 2014
    Applicant: JAPAN DISPLAY INC.
    Inventors: Tomonori NISHINO, Syou YANAGISAWA, Kentaro AGATA, Nobuyuki ISHIGE
  • Publication number: 20140111724
    Abstract: An object of the present invention is to protect exposed inspection pads with a conductive tape when the application of resin is ceased and to enhance the reliability of the inspection pads. A liquid crystal display device is provided with a transparent electrode formed on a superficial side of a CF board, a grounded electrode, an inspection pad and a switching device between the inspection pad and a signal line or a scanning line respectively formed in a terminal area a TFT board and a conductive tape that electrically connects the transparent electrode of the CF board, the grounded electrode and the inspection pad respectively of the TFT board.
    Type: Application
    Filed: October 18, 2013
    Publication date: April 24, 2014
    Applicant: JAPAN DISPLAY INC.
    Inventors: Tomonori NISHINO, Syou YANAGISAWA, Kentaro AGATA, Nobuyuki ISHIGE
  • Publication number: 20140092335
    Abstract: Inspection pads are reduced when there is a need to input a plurality of control signals as inspection control signals. A display device includes: an integrated circuit; a first substrate on which a plurality of signal lines that respectively input the control signals to the integrated circuit, and an inspection pad are formed; and a driver circuit that that is mounted on the first substrate and connected to the plurality of signal lines. The plurality of signal lines include first and second signal lines adjacent to each other. The inspection pad is formed on the one signal line. The second signal line is connected to the inspection pad through a switch element. At the time of inspection, the switch element turns on, and the same control signal is input to the first and second signal lines from the inspection pad.
    Type: Application
    Filed: September 24, 2013
    Publication date: April 3, 2014
    Applicant: Japan Display Inc.
    Inventor: Kentaro AGATA
  • Patent number: 8624251
    Abstract: An electronic panel includes insulation films that cover metal wirings and have plated through holes which expose parts of the respective metal wirings, oxide semiconductor films that electrically conducted with the metal wirings via the plated through holes formed on the insulation films, and an electrical component that includes electrodes which are electrically connected to the oxide semiconductor films. The oxide semiconductor film includes first and second portions in which the widths thereof are different from each other. The width of the first portion is wider than the width of the second portion. A portion faces a part of the metal wiring which is exposed from the plated through hole, and the portion is electrically connected to the part of the metal wiring. At least a part of the second portion faces the electrode of the electrical component and is electrically connected to the electrode.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: January 7, 2014
    Assignee: Japan Display Inc.
    Inventors: Kentaro Agata, Syou Yanagisawa, Megumi Oomori
  • Publication number: 20120248447
    Abstract: An electronic panel includes insulation films that cover metal wirings and have plated through holes which expose parts of the respective metal wirings, oxide semiconductor films that electrically conducted with the metal wirings via the plated through holes formed on the insulation films, and an electrical component that includes electrodes which are electrically connected to the oxide semiconductor films. The oxide semiconductor film includes first and second portions in which the widths thereof are different from each other. The width of the first portion is wider than the width of the second portion. A portion faces a part of the metal wiring which is exposed from the plated through hole, and the portion is electrically connected to the part of the metal wiring. At least a part of the second portion faces the electrode of the electrical component and is electrically connected to the electrode.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 4, 2012
    Inventors: Kentaro AGATA, Syou YANAGISAWA, Megumi OOMORI
  • Publication number: 20060250342
    Abstract: The present invention decreases the voltage dependency of a semiconductor resistance element used in a resistance voltage dividing circuit thus preventing the deterioration of display quality of a display image and, at the same time, realizing the reduction of power consumption. In a display device which includes a display element and a drive circuit which drives the display element, the drive circuit includes a semiconductor resistance element, the semiconductor resistance element includes a first conductive impurity region and a second conductive impurity region which is embedded in the first conductive impurity region and functions as a resistance element, the second conductive impurity region includes a first electrode and a second electrode, and a voltage which is applied to the first electrode or the second electrode of the second conductive impurity region is applied to the first conductive impurity region.
    Type: Application
    Filed: March 31, 2006
    Publication date: November 9, 2006
    Inventors: Yoshihiro Kotani, Hidetoshi Kida, Kentaro Agata, Youzou Nakayasu, Hiroshi Watanabe
  • Patent number: 6924782
    Abstract: A liquid crystal display device has a semiconductor integrated circuit capable of outputting a voltage equal to or higher than the source-drain withstand voltage of a component transistor. A switching circuit has first conducting-type first and second transistors connected in series between a first input terminal and a common output terminal and second conducting-type third and fourth transistors connected between a second input terminal and the common output terminal and a switching control circuit for controlling the switching circuit. The switching control circuit applies first and second bias voltages for turning on the second and fourth transistors to the gate electrodes of the second and fourth transistors, and applies a control voltage for selectively turning on/off the first or third transistor to the gate electrodes of the first and third transistors.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: August 2, 2005
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Takahiro Fujioka, Kazunari Kurokawa, Hiroshi Katayanagi, Mitsuru Goto, Yukihide Ode, Akira Ogura, Kentaro Agata
  • Patent number: 6556182
    Abstract: A liquid crystal display element having pixels, video signal lines applying a video signal voltage to the pixels and a video signal line driver supplying the video signal voltages to the video signal lines. The video signal line driver circuit includes a gray-scale voltage generating circuit provided with a resistor circuit dividing voltages between plural gray-scale reference voltages to generate plural gray-scale voltages, and selector circuits selecting one gray-scale voltage in accordance with the display data. The resistor circuit includes a resistive element provided with plural Intermediate taps for dividing voltages to generate the gray-scale voltages, gray-scale voltage lines corresponding to the gray-scale voltages, an interlayer insulating film insulating the gray-scale lines from the resistive element, and connections connecting the gray-scale voltage lines to corresponding ones of the intermediate taps through a hole in the interlayer insulating film.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: April 29, 2003
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd., Hitachi ULSI Systems Co., Ltd.
    Inventors: Mitsuru Goto, Yozo Nakayasu, Shinji Yasukawa, Kentaro Agata, Yuji Yamashita, Koichi Kotera
  • Patent number: 6518946
    Abstract: A liquid crystal display device including a liquid crystal panel having a plurality of pixels, a driving circuit applying a video signal voltage to each of the pixels in accordance with display data. The driving circuit has a first circuit, a second circuit, and a switching circuit which connects an output terminal of the first circuit with an input terminal of the second circuit. The first circuit outputs a first voltage and a second voltage in accordance with first display data, and outputs the second voltage and a third voltage in accordance with second display data. The second voltage is lower than the first voltage, and the third voltage is lower than the second voltage.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: February 11, 2003
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Yukihide Ode, Akira Ogura, Kentaro Agata, Kazunari Kurokawa, Takahiro Fujioka, Hiroshi Katayanagi, Mitsuru Goto
  • Patent number: 6417827
    Abstract: A MOS transistor (M1) which is arranged in the highest order of a low Vth MOS transistor grayscale group of a decoder circuit of a drain driver is formed of a CMOS transistor, to prevent a current from flowing from an output side into the low Vth MOS transistor portion owing to a grayscale voltage applied to another portion.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: July 9, 2002
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Shoji Nagao, Takahiro Fujioka, Mitsuru Goto, Kazunari Saito, Shinji Yasukawa, Yozo Nakayasu, Kentaro Agata
  • Patent number: 6320630
    Abstract: A liquid crystal display device in which bump electrodes of a semiconductor chip included in a video signal line driving circuit are disposed over noise-absorbing protective diodes so that the area occupied by the semiconductor chip is decreased to reduce the size of the video signal line driving circuit.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: November 20, 2001
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Yuji Yamashita, Mitsuru Goto, Masanari Saito, Shinji Yasukawa, Akira Ogura, Kentaro Agata
  • Publication number: 20010024183
    Abstract: A liquid crystal display device including a liquid crystal panel having a plurality of pixels, a driving circuit applying a video signal voltage to each of the pixels in accordance with display data. The driving circuit has a first circuit, a second circuit, and a switching circuit which connects an output terminal of the first circuit with an input terminal of the second circuit. The first circuit outputs a first voltage and a second voltage in accordance with first display data, and outputs the second voltage and a third voltage in accordance with second display data. The second voltage is lower than the first voltage, and the third voltage is lower than the second voltage.
    Type: Application
    Filed: May 11, 2001
    Publication date: September 27, 2001
    Inventors: Yukihide Ode, Akira Ogura, Kentaro Agata, Kazunari Kurokawa, Takahiro Fujioka, Hiroshi Katayanagi, Mitsuru Goto
  • Patent number: 6232941
    Abstract: A liquid crystal display device is capable of generating gradation voltages for multilevel gradation, such as 256-level gradation, without increasing the chip size of video signal line driving means.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: May 15, 2001
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Yukihide Ode, Akira Ogura, Kentaro Agata, Kazunari Kurokawa, Takahiro Fujioka, Hiroshi Katayanagi, Mitsuru Goto