Patents by Inventor Masatsugu Onizuka

Masatsugu Onizuka 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: 8035541
    Abstract: A digital-analog converter circuit includes: a first digital-analog conversion part that obtains an analog output signal in response to a value of a digital input signal; and a second digital-analog conversion part that generates a control signal in response to a value of a digital gain control input signal externally input, wherein the first digital-analog conversion part adjusts a start voltage or end voltage of the analog output signal based on the digital gain control input signal for controlling the second digital-analog conversion part.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: October 11, 2011
    Assignee: Sony Corporation
    Inventors: Masatsugu Onizuka, Masaru Kikuchi
  • Patent number: 7965259
    Abstract: A plasma display device in which a sustain pulse having a leading period is applied between row electrodes forming each row electrode pair by a number of times previously determined for each subfield, in a sustain period, and a length of the leading period of the sustain pulse is set in accordance with an accumulated light emission time or an accumulated use time of the plasma display panel.
    Type: Grant
    Filed: November 3, 2006
    Date of Patent: June 21, 2011
    Assignee: Panasonic Corporation
    Inventors: Masatsugu Onizuka, Motofumi Ikeda, Yoshichika Sato, Tsutomu Tokunaga
  • Patent number: 7852296
    Abstract: A plasma display device in which at least one of a first sustain pulse having a first leading period and a second sustain pulse having a second leading period shorter than the first leading period is applied between row electrodes forming each row electrode pair by a number of times previously determined for each subfield, in a sustain period, and an application ratio between the first sustain pulse and the second sustain pulse in the sustain period of each subfield is changed in accordance with a luminance level of a video signal.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: December 14, 2010
    Assignee: Panasonic Corporation
    Inventors: Yoshichika Sato, Tsutomu Tokunaga, Motofumi Ikeda, Masatsugu Onizuka
  • Publication number: 20100245303
    Abstract: A plasma display device in which a sustain pulse having a leading period is applied between row electrodes forming each row electrode pair by a number of times previously determined for each subfield, in a sustain period, and a length of the leading period of the sustain pulse is set in accordance with an accumulated light emission time or an accumulated use time of the plasma display panel.
    Type: Application
    Filed: June 10, 2010
    Publication date: September 30, 2010
    Inventors: Masatsugu ONIZUKA, Motofumi Ikeda, Yoshichika Sato, Tsutomu Tokunaga
  • Patent number: 7724213
    Abstract: A plasma display device is provided which can stabilize discharge and improve display quality. In the plasma display device, a rear edge part of a sustain pulse to be applied at the end of a sustain period of each of the subfields is formed of a first section in which a voltage value slowly changes from a peak voltage value of the sustain pulse to a predetermined first voltage value, a second section in which the first voltage value is maintained for a predetermined period, and a third section in which the voltage value slowly changes from the first voltage value to a second voltage value having polarity different from that of the first voltage value.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: May 25, 2010
    Assignee: Panasonic Corporation
    Inventors: Motofumi Ikeda, Kazuaki Sakata, Masatsugu Onizuka
  • Publication number: 20100052965
    Abstract: A digital-analog converter circuit includes: a first digital-analog conversion part that obtains an analog output signal in response to a value of a digital input signal; and a second digital-analog conversion part that generates a control signal in response to a value of a digital gain control input signal externally input, wherein the first digital-analog conversion part adjusts a start voltage or end voltage of the analog output signal based on the digital gain control input signal for controlling the second digital-analog conversion part.
    Type: Application
    Filed: July 29, 2009
    Publication date: March 4, 2010
    Applicant: Sony Corporation
    Inventors: Masatsugu ONIZUKA, Masaru KIKUCHI
  • Publication number: 20070103395
    Abstract: A plasma display device in which a sustain pulse having a leading period is applied between row electrodes forming each row electrode pair by a number of times previously determined for each subfield, in a sustain period, and a length of the leading period of the sustain pulse is set in accordance with an accumulated light emission time or an accumulated use time of the plasma display panel.
    Type: Application
    Filed: November 3, 2006
    Publication date: May 10, 2007
    Inventors: Masatsugu Onizuka, Motofumi Ikeda, Yoshichika Sato, Tsutomu Tokunaga
  • Publication number: 20070057871
    Abstract: A plasma display device which changes, in accordance with an average luminance level of a video signal, the length of a pause period between a sustain pulse application end point at which one sustain pulse is applied in a sustain period of each of subfields and a sustain pulse application starting point at which the next sustain pulse is applied.
    Type: Application
    Filed: September 6, 2006
    Publication date: March 15, 2007
    Inventors: Yoshichika Sato, Motofumi Ikeda, Masatsugu Onizuka
  • Publication number: 20070052630
    Abstract: A plasma display device in which at least one of a first sustain pulse having a first leading period and a second sustain pulse having a second leading period shorter than the first leading period is applied between row electrodes forming each row electrode pair by a number of times previously determined for each subfield, in a sustain period, and an application ratio between the first sustain pulse and the second sustain pulse in the sustain period of each subfield is changed in accordance with a luminance level of a video signal.
    Type: Application
    Filed: September 8, 2006
    Publication date: March 8, 2007
    Inventors: Yoshichika Sato, Tsutomu Tokunaga, Motofumi Ikeda, Masatsugu Onizuka
  • Publication number: 20060279484
    Abstract: A plasma display device is provided which can stabilize discharge and improve display quality. In the plasma display device, a rear edge part of a sustain pulse to be applied at the end of a sustain period of each of the subfields is formed of a first section in which a voltage value slowly changes from a peak voltage value of the sustain pulse to a predetermined first voltage value, a second section in which the first voltage value is maintained for a predetermined period, and a third section in which the voltage value slowly changes from the first voltage value to a second voltage value having polarity different from that of the first voltage value.
    Type: Application
    Filed: April 25, 2006
    Publication date: December 14, 2006
    Inventors: Motofumi Ikeda, Kazuaki Sakata, Masatsugu Onizuka