Patents by Inventor Hiroshi Katayanagi

Hiroshi Katayanagi 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: 8922468
    Abstract: A semiconductor integrated circuit including a first register which latches display data, a second register which latches the display data of the first register in accordance with a first clock, a gray scale voltage generator which outputs a plurality of gray scale voltages, a decoder which selects a gray scale voltage in accordance with the display data of the second register from the plurality of gray scale voltages, and an amplifier including a first transistor and a second transistor. A first terminal of the first transistor and a first terminal of the second transistor are connected to a first voltage line, and the gray scale voltage outputted from the decoder is supplied to one of input terminals of the first transistor and the second transistor in accordance with a control signal. A phase of the control signal is reversed at intervals of two horizontal scanning lines.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: December 30, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Mitsuru Goto, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, Koichi Kotera
  • Publication number: 20140132645
    Abstract: A semiconductor integrated circuit including a first register which latches display data, a second register which latches the display data of the first register in accordance with a first clock, a gray scale voltage generator which outputs a plurality of gray scale voltages, a decoder which selects a gray scale voltage in accordance with the display data of the second register from the plurality of gray scale voltages, and an amplifier including a first transistor and a second transistor. A first terminal of the first transistor and a first terminal of the second transistor are connected to a first voltage line, and the gray scale voltage outputted from the decoder is supplied to one of input terminals of the first transistor and the second transistor in accordance with a control signal. A phase of the control signal is reversed at intervals of two horizontal scanning lines.
    Type: Application
    Filed: January 21, 2014
    Publication date: May 15, 2014
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Japan Display Inc.
    Inventors: Mitsuru GOTO, Hiroshi KATAYANAGI, Yukihide ODE, Yoshiyuki SAITOU, Koichi KOTERA
  • Patent number: 8633882
    Abstract: A semiconductor integrated circuit including a first register which latches display data, a second register which latches the display data of the first register in accordance with a first clock, a gray scale voltage generator which outputs a plurality of gray scale voltages, a decoder which selects a gray scale voltage in accordance with the display data of the second register from the plurality of gray scale voltages, and an amplifier including a first transistor and a second transistor. A first terminal of the first transistor and a first terminal of the second transistor are connected to a first voltage line, and the gray scale voltage outputted from the decoder is supplied to one of input terminals of the first transistor and the second transistor in accordance with a control signal. A phase of the control signal is reversed at intervals of two horizontal scanning lines.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: January 21, 2014
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Mitsuru Goto, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, Koichi Kotera
  • Publication number: 20120194574
    Abstract: A semiconductor integrated circuit including a first register which latches display data, a second register which latches the display data of the first register in accordance with a first clock, a gray scale voltage generator which outputs a plurality of gray scale voltages, a decoder which selects a gray scale voltage in accordance with the display data of the second register from the plurality of gray scale voltages, and an amplifier including a first transistor and a second transistor. A first terminal of the first transistor and a first terminal of the second transistor are connected to a first voltage line, and the gray scale voltage outputted from the decoder is supplied to one of input terminals of the first transistor and the second transistor in accordance with a control signal. A phase of the control signal is reversed at intervals of two horizontal scanning lines.
    Type: Application
    Filed: April 9, 2012
    Publication date: August 2, 2012
    Inventors: Mitsuru Goto, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, Koichi Kotera
  • Patent number: 8159437
    Abstract: A semiconductor integrated circuit includes a first register which latches display data, a second register which latches the display data of the first register in accordance with a first clock, a gray scale voltage generator which outputs a plurality of gray scale voltages, a decoder which selects a gray scale voltage in accordance with the display data of the second register from the plurality of gray scale voltages, and an amplifier including a first transistor, and a second transistor. A first terminal of the first transistor and a first terminal of the second transistor are connected to a first voltage line, and the gray scale voltage outputted from the decoder is supplied to one of input terminals of the first transistor and the second transistor in accordance with a control signal. A phase of the control signal is reversed at intervals of two frame periods.
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: April 17, 2012
    Assignees: Hitachi Displays, Ltd., Hitachi ULSI Systems Co., Ltd.
    Inventors: Mitsuru Goto, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, Koichi Kotera
  • Publication number: 20110261092
    Abstract: A semiconductor integrated circuit includes a first register which latches display data, a second register which latches the display data of the first register in accordance with a first clock, a gray scale voltage generator which outputs a plurality of gray scale voltages, a decoder which selects a gray scale voltage in accordance with the display data of the second register from the plurality of gray scale voltages, and an amplifier including a first transistor, and a second transistor. A first terminal of the first transistor and a first terminal of the second transistor are connected to a first voltage line, and the gray scale voltage outputted from the decoder is supplied to one of input terminals of the first transistor and the second transistor in accordance with a control signal. A phase of the control signal is reversed at intervals of two frame periods.
    Type: Application
    Filed: July 6, 2011
    Publication date: October 27, 2011
    Inventors: Mitsuru Goto, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, Koichi Kotera
  • Patent number: 7990355
    Abstract: A semiconductor integrated circuit includes a first register, a second register, a gray scale voltage generator which outputs a plurality of gray scale voltages, a decoder which selects a gray scale voltage, and an amplifier including a first transistor, a second transistor, a third transistor, and a fourth transistor. A first terminal of the first transistor and a first terminal of the second transistors are connected to a first voltage line, a first terminal of the third transistor and a first terminal of the fourth transistor are connected to a second voltage line, a second terminal of the first transistor is connected to a second terminal of the third transistor, and a second terminal of the second transistor is connected to a second terminal of the fourth transistor.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: August 2, 2011
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd., Hitachi ULSI Systems Co., Ltd.
    Inventors: Mitsuru Goto, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, Koichi Kotera
  • Patent number: 7964870
    Abstract: To provide a display device capable of reliably forming a resistive element formed on a substrate including pixels. A display device including at least a thin-film transistor and a resistive element on a substrate has a gate electrode, an insulating film, a semiconductor layer and a conductive layer which are sequentially stacked on the substrate, in which the resistive element is formed by using the semiconductor layer formed between end portions of wiring made of the conductive layer as a resistive body, and at least one conductive layer apart from the end portions is formed on the semiconductor layer between the end portions of wiring.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: June 21, 2011
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Tsuyoshi Uchida, Hiroshi Katayanagi
  • Publication number: 20110043550
    Abstract: A semiconductor integrated circuit includes a first register, a second register, a gray scale voltage generator which outputs a plurality of gray scale voltages, a decoder which selects a gray scale voltage, and an amplifier including a first transistor, a second transistor, a third transistor, and a fourth transistor. A first terminal of the first transistor and a first terminal of the second transistors are connected to a first voltage line, a first terminal of the third transistor and a first terminal of the fourth transistor are connected to a second voltage line, a second terminal of the first transistor is connected to a second terminal of the third transistor, and a second terminal of the second transistor is connected to a second terminal of the fourth transistor.
    Type: Application
    Filed: November 3, 2010
    Publication date: February 24, 2011
    Inventors: Mitsuro Goto, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, Koichi Kotera
  • Patent number: 7830347
    Abstract: A liquid crystal display device includes drain signal lines, gate signal lines, thin film transistors, and a drain driver. The drain driver includes an amplifier circuit having a switching circuit which switches between a first state and a second state, the first state being a state where a first input terminal of the amplifier circuit is coupled to an inverting input terminal and a second input terminal is coupled to a noninverting input terminal, and the second state being a state where the first input terminal is coupled to the noninverting input terminal and the second input terminal is coupled to the inverting input terminal. The amplifier circuit supplies signal voltages to the thin film transistors via the drain signal lines which are gray scale voltages one of plus and minus offset voltages in a first frame and in a second frame.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: November 9, 2010
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd., Hitachi Ulsi Systems Co., Ltd.
    Inventors: Mitsuru Goto, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, Koichi Kotera
  • Publication number: 20080296576
    Abstract: To provide a display device capable of reliably forming a resistive element formed on a substrate including pixels. A display device including at least a thin-film transistor and a resistive element on a substrate has a gate electrode, an insulating film, a semiconductor layer and a conductive layer which are sequentially stacked on the substrate, in which the resistive element is formed by using the semiconductor layer formed between end portions of wiring made of the conductive layer as a resistive body, and at least one conductive layer apart from the end portions is formed on the semiconductor layer between the end portions of wiring.
    Type: Application
    Filed: June 2, 2008
    Publication date: December 4, 2008
    Inventors: Tsuyoshi Uchida, Hiroshi Katayanagi
  • Patent number: 7417614
    Abstract: A liquid crystal display device having a liquid crystal display element having a plurality of pixels. The video signal line driver circuit includes a plurality of amplifiers each of which has a pair of a first input terminal and a second input terminal, and a plurality of pairs of an inverting input terminal and a noninverting input terminal. Each of the plurality of amplifiers has a switching circuit which switches between a first state and a second state, based on a switching control signal supplied with a switching repetition period equal to double a display line repetition period.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: August 26, 2008
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd., Hitachi Ulsi Systems Co., ltd.
    Inventors: Mitsuru Goto, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, Koichi Kotera
  • Publication number: 20080024419
    Abstract: A liquid crystal display device includes drain signal lines, gate signal lines, thin film transistors, and a drain driver. The drain driver includes an amplifier circuit having a switching circuit which switches between a first state and a second state, the first state being a state where a first input terminal of the amplifier circuit is coupled to an inverting input terminal and a second input terminal is coupled to a noninverting input terminal, and the second state being a state where the first input terminal is coupled to the noninverting input terminal and the second input terminal is coupled to the inverting input terminal. The amplifier circuit supplies signal voltages to the thin film transistors via the drain signal lines which are gray scale voltages one of plus and minus offset voltages in a first frame and in a second frame.
    Type: Application
    Filed: September 27, 2007
    Publication date: January 31, 2008
    Inventors: Mitsuru GOTO, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, Koichi Kotera
  • 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
  • Publication number: 20040196231
    Abstract: A liquid crystal display device having a liquid crystal display element having a plurality of pixels. The video signal line driver circuit includes a plurality of amplifiers each of which has a pair of a first input terminal and a second input terminal, and a plurality of pairs of an inverting input terminal and a noninverting input terminal. Each of the plurality of amplifiers has a switching circuit which switches between a first state and a second state, based on a switching control signal supplied with a switching repetition period equal to double a display line repetition period.
    Type: Application
    Filed: April 27, 2004
    Publication date: October 7, 2004
    Inventors: Mitsuru Goto, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, Koichi Kotera
  • Patent number: 6731263
    Abstract: Each video signal driver circuit in a liquid crystal display device includes a first amplifier circuit with a first output terminal and first and second input terminals; a second amplifier circuit with a second output terminal and third and fourth input terminals; a first connecting circuit switchable between a first connection wherein an output voltage from the first output terminal is input to the first input terminal as a reference voltage, and a second connection wherein the output voltage from the first output terminal is input to the second input terminal as a reference voltage; and a second connecting circuit switchable between a third connection wherein an output voltage from the second output terminal is input to the third input terminal as a reference voltage, and a fourth connection wherein the output voltage from the second output terminal is input to the fourth input terminal as a reference voltage.
    Type: Grant
    Filed: May 14, 2002
    Date of Patent: May 4, 2004
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd., Hitachi ULSI Systems Co., Ltd.
    Inventors: Mitsuru Goto, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, 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
  • Publication number: 20020171613
    Abstract: A liquid crystal display device includes plural pixels supplied with video signal voltages via video signal lines, and a video signal line driver circuit for supplying the video signals voltage to the video signal lines. The video signal line driver circuit includes plural differential amplifiers each having a pair of a first input terminal and a second input terminal and amplifying inputted video signals and supplying the amplified video signal to the video signal lines, a plurality of pairs of an inverting input terminal and a noninverting input terminal each pair corresponding to each of the differential amplifiers.
    Type: Application
    Filed: May 14, 2002
    Publication date: November 21, 2002
    Inventors: Mitsuru Goto, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, Koichi Kotera
  • Patent number: 6388653
    Abstract: A liquid crystal display device includes plural pixels supplied with video signal voltages via video signal lines, and a video signal line driver circuit for supplying the video signals voltage to the video signal lines. The video signal line driver circuit includes plural differential amplifiers each having a pair of a first input terminal and a second input terminal and amplifying inputted video signals and supplying the amplified video signal to the video signal lines, a plurality of pairs of an inverting input terminal and a noninverting input terminal each pair corresponding to each of the differential amplifiers.
    Type: Grant
    Filed: March 2, 1999
    Date of Patent: May 14, 2002
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd., Hitachi ULSI Systems Co., Ltd.
    Inventors: Mitsuru Goto, Hiroshi Katayanagi, Yukihide Ode, Yoshiyuki Saitou, Koichi Kotera
  • Patent number: D1010804
    Type: Grant
    Filed: April 12, 2021
    Date of Patent: January 9, 2024
    Assignee: NEC PLATFORMS, LTD.
    Inventors: Kazuhiro Kakehata, Hiroshi Katayanagi, Ikuhiro Aota