Patents by Inventor Kazuaki Sakata

Kazuaki Sakata 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: 20050264487
    Abstract: A plasma display device having a plasma display panel in which, each display cell contains a magnesium oxide layer including magnesium oxide crystals that are excited by an electron beam to emit cathode luminescence light having a peak in a wavelength range of 200 to 300 nm. In an addressing period, a row electrode driving circuit applies a scanning pulse to one row electrodes of row electrode pairs in turn, while a column electrode driving circuit supplies column electrodes with data pulses corresponding to one row electrode which is applied with the scanning pulse.
    Type: Application
    Filed: May 24, 2005
    Publication date: December 1, 2005
    Applicant: Pioneer Corporation
    Inventors: Tsutomu Tokunaga, Masaru Nishimura, Kazuaki Sakata, Atsushi Hirota, Hai Lin
  • Publication number: 20050253787
    Abstract: There are provided a plasma display device in which dark contrast can be enhanced without deteriorating an image quality and a method of driving a plasma display panel. In a case of driving a plasma display device in which a magnesium oxide layer containing a magnesium oxide crystal to be excited by the irradiation of an electron beam and performing a cathode luminescence having a peak in a wavelength range of 200 to 300 nm by a sub-field method, in order to initialize all display cells, reset discharge is caused in each of the display cells in M sub-fields of N consecutive sub-fields (0<M<N).
    Type: Application
    Filed: May 17, 2005
    Publication date: November 17, 2005
    Inventors: Masaru Nishimura, Tsutomu Tokunaga, Kazuaki Sakata, Atsushi Hirota, Hai Lin
  • Publication number: 20050248511
    Abstract: A plasma display apparatus and a driving method of a plasma display panel which can improve a gradation expressing ability at low luminance. A magnesium oxide layer containing a magnesium oxide crystal which is excited by irradiation of an electron beam and performs a cathode luminescence light emission having a peak in a wavelength range of 200 to 300 nanometers is provided in each of display cells formed on the plasma display panel. When driving for a plurality of subfields having different luminance weights is performed, a sustaining discharge is caused only once in the subfield having the minimum luminance weight.
    Type: Application
    Filed: April 21, 2005
    Publication date: November 10, 2005
    Inventors: Kazuaki Sakata, Masaru Nishimura, Atsushi Hirota, Tsutomu Tokunaga, Hai Lin
  • Publication number: 20050248510
    Abstract: A plasma display device and a method of driving a plasma display panel are provided for improving the contrast without degrading the image quality. Each of display cells formed on the plasma display panel has a magnesium oxide layer containing magnesium oxide crystals. The magnesium oxide crystals are excited by an electron beam irradiated thereto and emit cathode luminescence light having a peak in a wavelength range of 200 to 300 nm. In order to trigger a rest discharge in all the display cells, each row electrode pair of the plasma display panel is applied with a reset pulse which has a particular pulse waveform. The voltage value of this reset pulse slowly changes over time to reach a peak voltage value.
    Type: Application
    Filed: April 21, 2005
    Publication date: November 10, 2005
    Inventors: Kazuaki Sakata, Masaru Nishimura, Atsushi Hirota, Tsutomu Tokunaga, Hai Lin
  • Patent number: 6876341
    Abstract: A driving apparatus for a display panel capable of reducing a circuit scale while suppressing the drop of a contrast includes a scan driver having a first power source for generating a first voltage, generating a scan pulse for bringing the capacitive light emission device to either an ON state or an OFF state based on the first voltage, and applying the scan pulse to the row electrode, a sustain driver having a second power source for generating a second voltage, generating a sustain pulse for allowing the capacitive light emission device set to the ON state to emit light based on the second voltage, and applying the scan pulse to the row electrode, and a reset driver generating a reset pulse for initializing the capacitive light emission device based on the sum of the first voltage and the second voltage, and applying the reset pulse to the row electrode.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: April 5, 2005
    Assignee: Pioneer Corporation
    Inventors: Shigeo Ide, Hideto Nakamura, Kazuaki Sakata, Yoshichika Sato, Tsutomu Tokunaga, Hideki Tanaka
  • Publication number: 20050017962
    Abstract: An apparatus for driving a display panel can execute quality image display. To allow discharge cells operating as pixels of the display panel to repeatedly perform sustain discharge, a fall period of a last sustain pulse of sustain pulses repeatedly applied to row electrodes includes a first voltage drop period in which a voltage value gently drops, a voltage constant period which follows the first voltage drop period and in which the voltage value remains constant for a predetermined period, and a second voltage drop period which follows the voltage constant period and in which the voltage value drops more gently than in the first voltage drop period.
    Type: Application
    Filed: July 19, 2004
    Publication date: January 27, 2005
    Inventors: Kazuaki Sakata, Yoshichika Sato, Tsutomu Tokunaga, Hideki Tanaka, Hideto Nakamura
  • Publication number: 20050017961
    Abstract: In order to provide a method for driving a display panel capable of improving durability of a driving device for driving a display panel, when a scan pulse is applied in superposition with a base pulse to one of row electrodes of one row electrode pair among row electrode pairs while the base pulse is applied to one of the row electrodes of all the row electrode pairs in the display panel and a pixel data pulse corresponding to an image signal is applied to the row electrode at the same timing as that of the scan pulse to set discharge cells to either one of a light-on mode and a light-off mode, a change ratio of a voltage value in a fall period in the base pulse is smaller than a change ratio of a voltage value in a fall period in the scan pulse.
    Type: Application
    Filed: July 19, 2004
    Publication date: January 27, 2005
    Inventors: Kazuaki Sakata, Hideto Nakamura, Hideki Tanaka, Yoshichika Sato, Tsutomu Tokunaga, Mitsushi Kitagawa
  • Publication number: 20050012691
    Abstract: A method for driving a plasma display panel which sets a pulse width of a first sustain pulse applied first of sustain pulses applied in a light emission sustain stage to be larger than a pulse width of at least one sustain pulse of sustain pulses applied after the first sustain pulse, and applies wall charge amount adjusting pulses having the same polarity as the sustain pulses simultaneously to respective row electrodes which form a pair immediately before the first sustain pulse is applied. An erroneous discharge can be prevented in the light emission sustain stage in each subfield.
    Type: Application
    Filed: July 15, 2004
    Publication date: January 20, 2005
    Inventors: Tsutomu Tokunaga, Kazuaki Sakata, Hideki Tanaka, Hideto Nakamura, Yoshichika Sato
  • Publication number: 20040164929
    Abstract: A driving apparatus for a display panel capable of reducing a circuit scale while suppressing the drop of a contrast includes a scan driver having a first power source for generating a first voltage, generating a scan pulse for bringing the capacitive light emission device to either one of an ON state and an OFF state based on the first voltage, and applying the scan pulse to the row electrode, a sustain driver having a second power source for generating a second voltage, generating a sustain pulse for allowing the capacitive light emission device set to the ON state to emit light based on the second voltage, and applying the scan pulse to the row electrode, and a reset driver generating a reset pulse for initializing the state of the capacitive light emission device based on the sum of the first voltage generated by the first power source and the second voltage generated by the second power source, and applying the reset pulse to the row electrode.
    Type: Application
    Filed: October 24, 2003
    Publication date: August 26, 2004
    Applicant: PIONEER CORPORATION
    Inventors: Shigeo Ide, Hideto Nakamura, Kazuaki Sakata, Yoshichika Sata, Tsutomu Tokunaga, Hideki Tanaka