Patents by Inventor Yoshikazu Kanazawa

Yoshikazu Kanazawa 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: 8947324
    Abstract: A display apparatus, that can prevent thermal destruction and burning with a simple structure, has been disclosed. In the apparatus it is judged that there is possibility of a pattern, whose area with high brightness is small, being displayed frequently, when a state in which the total light emission pulse number remains large occurs with high frequency, and if such a state is detected, the total light emission pulse number (sustain frequency) is reduced to prevent the thermal destruction and burning.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: February 3, 2015
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Ayahito Kojima, Shigeki Kameyama, Hirohito Kuriyama, Yoshikazu Kanazawa, Toshio Ueda
  • Publication number: 20140306944
    Abstract: A method of driving a plasma display apparatus in which first electrodes and second electrodes are arranged adjacently and third electrodes are arranged to cross the first and second electrodes and in which one field comprises plural subfields having a reset period followed by an address period and a sustain period is provided. The method includes in the reset period in at least two of the subfields, applying a first waveform having a voltage that gradually increases in time to a first reached voltage to the second electrodes, and thereafter, applying a second waveform having a voltage that gradually decreases in time to the second electrodes, wherein the first reached voltages applied in at least two subfields of the subfields are different.
    Type: Application
    Filed: June 24, 2014
    Publication date: October 16, 2014
    Inventors: Yoshikazu Kanazawa, Shigeharu Asao
  • Publication number: 20140300590
    Abstract: A method is provided for driving a plasma display panel having parallel first and second electrodes, third electrodes crossing the first and second electrodes, and discharge cells with electrodes crossing mutually in the form of a matrix. The method includes a reset period during which distribution of wall charges in the discharge cells is uniformed, an addressing period during which wall charges are produced in the discharge cells according to display data, and a sustain discharge period during which sustain discharge is induced in discharge cells in which wall charges are produced during the addressing period. The driving method includes during the reset period, in lines defined by the first and second electrodes, applying a first pulse, in which an applied voltage varies with time to induce first discharge, and applying a second pulse in which an applied voltage varies with time to induce second discharge as an erase discharge.
    Type: Application
    Filed: June 19, 2014
    Publication date: October 9, 2014
    Applicant: HITACHI MAXELL, LTD.
    Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
  • Patent number: 8797237
    Abstract: A plasma display apparatus and method are provided. The plasma display apparatus includes a plasma display panel in which first electrodes and second electrodes are arranged adjacently and third electrodes are arranged to cross the first and second electrodes. The method for driving a plasma display apparatus in which first electrodes and second electrodes are arranged adjacently and third electrodes are arranged to cross the first and second electrodes and in which one field comprises subfields having a reset period followed by an address period and a sustain period includes in a reset period, applying to second electrodes a voltage of a first waveform in which an applied voltage value increases according to a lapse of time and applying to second electrodes a voltage of a second waveform in which an applied voltage value decreases according to a lapse of time.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: August 5, 2014
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Yoshikazu Kanazawa, Shigeharu Asao
  • Patent number: 8791933
    Abstract: A method is provided for driving a plasma display panel having parallel first and second electrodes, third electrodes crossing the first and second electrodes, and discharge cells with electrodes crossing mutually in the form of a matrix. The method includes a reset period during which distribution of wall charges in the discharge cells is uniformed, an addressing period during which wall charges are produced in the discharge cells according to display data, and a sustain discharge period during which sustain discharge is induced in discharge cells in which wall charges are produced during the addressing period. The driving method includes during the reset period, in lines defined by the first and second electrodes, applying a first pulse, in which an applied voltage varies with time to induce first discharge, and applying a second pulse in which an applied voltage varies with time to induce second discharge as an erase discharge.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: July 29, 2014
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
  • Publication number: 20140022224
    Abstract: A method is provided for driving a plasma display panel having parallel first and second electrodes, third electrodes crossing the first and second electrodes, and discharge cells with electrodes crossing mutually in the form of a matrix. The method includes a reset period during which distribution of wall charges in the discharge cells is uniformed, an addressing period during which wall charges are produced in the discharge cells according to display data, and a sustain discharge period during which sustain discharge is induced in discharge cells in which wall charges are produced during the addressing period. The driving method includes during the reset period, in lines defined by the first and second electrodes, applying a first pulse, in which an applied voltage varies with time to induce first discharge, and applying a second pulse in which an applied voltage varies with time to induce second discharge as an erase discharge.
    Type: Application
    Filed: September 25, 2013
    Publication date: January 23, 2014
    Applicant: HITACHI CONSUMER ELECTRONICS CO., LTD.
    Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
  • Patent number: 8570312
    Abstract: Provided is a plasma display device including a plasma display panel having a plurality of first and second electrodes extending in the horizontal direction and a plurality of third electrodes extending in the vertical direction, and first electrode driving circuit substrates to supply voltage to the first electrodes, in which center lines in the vertical direction of the first electrode driving circuit substrates are below a center line in the vertical direction of the plasma display panel.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: October 29, 2013
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Kunihiko Ogata, Yoshikazu Kanazawa
  • Patent number: 8558761
    Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: October 15, 2013
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
  • Patent number: 8344631
    Abstract: A method for driving a plasma display panel in which a plurality of first and second electrodes are arranged adjacently each other, a plurality of third electrodes are arranged to cross the first and second electrodes, the plasma display panel having a reset period, an address period, and a sustain discharge period is provided. The method includes in the reset period, applying to the second electrodes a first waveform voltage, whose applied potential increases with time, then applying to the second electrodes a second waveform voltage, whose applied potential decreases with time.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: January 1, 2013
    Assignee: Hitachi Plasma Patent Licensing Co., Ltd.
    Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
  • Publication number: 20120075276
    Abstract: A plasma display apparatus and method are provided. The plasma display apparatus includes a plasma display panel in which first electrodes and second electrodes are arranged adjacently and third electrodes are arranged to cross the first and second electrodes. The method for driving a plasma display apparatus in which first electrodes and second electrodes are arranged adjacently and third electrodes are arranged to cross the first and second electrodes and in which one field comprises subfields having a reset period followed by an address period and a sustain period includes in a reset period, applying to second electrodes a voltage of a first waveform in which an applied voltage value increases according to a lapse of time and applying to second electrodes a voltage of a second waveform in which an applied voltage value decreases according to a lapse of time.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 29, 2012
    Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITED
    Inventors: Yoshikazu Kanazawa, Shigeharu Asao
  • Publication number: 20120032602
    Abstract: A method for driving a plasma display panel in which a plurality of first and second electrodes are arranged adjacently each other, a plurality of third electrodes are arranged to cross the first and second electrodes, the plasma display panel having a reset period, an address period, and a sustain discharge period is provided. The method includes in the reset period, applying to the second electrodes a first waveform voltage, whose applied potential increases with time, then applying to the second electrodes a second waveform voltage, whose applied potential decreases with time.
    Type: Application
    Filed: August 8, 2011
    Publication date: February 9, 2012
    Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
  • Publication number: 20120007847
    Abstract: An electrode drive circuit of a plasma display device includes a scan driver provided with plural drivers having first and second switching elements and first and second diodes, and a positive reset pulse generating circuit by which a first superposed voltage obtained by applying a predetermined first voltage to a low potential side terminal of the second switching element and superposing the first voltage and a voltage between a high potential side terminal of the first switching element and the low potential side terminal of the second switching element is generated to the high potential side terminal of the first switching element. The first superposed voltage is applied to the electrodes via the first switching element.
    Type: Application
    Filed: September 20, 2011
    Publication date: January 12, 2012
    Inventors: Yoshikazu KANAZAWA, Shigetoshi Tomio, Takashi Fujisaki
  • Patent number: 8094092
    Abstract: A method of driving a PDP apparatus to sufficiently suppress the background light emission and improve the dark room contrast, in which first electrodes and second electrodes are arranged adjacently, a first display line is formed between one side of the second electrode and the first electrode adjacent thereto, a second display line is formed between the other side of the second electrode and the first electrode adjacent thereto, and the interlaced display that displays the first display line and the second display line alternately in different fields is performed, has been disclosed, wherein the reset voltage that directly relates to the intensity of the background light emission is varied according to the number of times of sustain discharges, the display conditions, and so on, in each subfield and the reset discharge is caused to occur with the minimum voltage in each subfield.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: January 10, 2012
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Yoshikazu Kanazawa, Shigeharu Asao
  • Publication number: 20120001836
    Abstract: An electrode drive circuit of a plasma display device includes a scan driver provided with plural drivers having first and second switching elements and first and second diodes, and a positive reset pulse generating circuit by which a first superposed voltage obtained by applying a predetermined first voltage to a low potential side terminal of the second switching element and superposing the first voltage and a voltage between a high potential side terminal of the first switching element and the low potential side terminal of the second switching element is generated to the high potential side terminal of the first switching element. The first superposed voltage is applied to the electrodes via the first switching element.
    Type: Application
    Filed: September 20, 2011
    Publication date: January 5, 2012
    Inventors: Yoshikazu KANAZAWA, Shigetoshi TOMIO, Takashi FUJISAKI
  • Patent number: 8022897
    Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: September 20, 2011
    Assignee: Hitachi Plasma Licensing Co., Ltd.
    Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
  • Patent number: 8018168
    Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: September 13, 2011
    Assignee: Hitachi Plasma Patent Licensing Co., Ltd.
    Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
  • Patent number: 8018167
    Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: September 13, 2011
    Assignee: Hitachi Plasma Licensing Co., Ltd.
    Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
  • Patent number: 7944407
    Abstract: A display apparatus, that can prevent thermal destruction and burning with a simple structure, has been disclosed. In the apparatus it is judged that there is possibility of a pattern, whose area with high brightness is small, being displayed frequently, when a state in which the total light emission pulse number remains large occurs with high frequency, and if such a state is detected, the total light emission pulse number (sustain frequency) is reduced to prevent the thermal destruction and burning.
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: May 17, 2011
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Ayahito Kojima, Shigeki Kameyama, Hirohito Kuriyama, Yoshikazu Kanazawa, Toshio Ueda
  • Patent number: 7906914
    Abstract: Disclosed is a method for driving a plasma display panel in which a plurality of first electrodes and second electrodes are arranged parallel to each other, a plurality of third electrodes are arranged to cross the first and second electrodes, and discharge cells defined with areas in which the electrodes cross mutually are arranged in the form of a matrix. According to the driving method, a reset period is a period during which the distribution of wall charges in the plurality of discharge cells is uniformed. An addressing period is a period during which wall charges are produced in the discharge cells according to display data. A sustain discharge period is a period during which sustain discharge is induced in the discharge cells in which wall charges are produced during the addressing period.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: March 15, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Noriaki Setoguchi, Shigeharu Asao, Yoshikazu Kanazawa
  • Patent number: 7880689
    Abstract: There is provided a drive circuit of a display device using a capacitive load which includes a clamp circuit connected to a power source potential and clamping a potential of the capacitive load to the power source potential such that an electric power is supplied to the capacitive load in a temporally dispersed manner. For example, the clamp circuit includes a plurality of switches parallelly connected between the capacitive load and the power source potential, the plurality of switches being turned on at different times.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: February 1, 2011
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Tomokatsu Kishi, Tetsuya Sakamoto, Akihiro Takagi, Satoru Nishimura, Yoshikazu Kanazawa, Takayuki Kobayashi, Takashi Sasaki, Yasunobu Hashimoto