Patents by Inventor Motofumi Ikeda
Motofumi Ikeda 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).
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Patent number: 7965259Abstract: 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: GrantFiled: November 3, 2006Date of Patent: June 21, 2011Assignee: Panasonic CorporationInventors: Masatsugu Onizuka, Motofumi Ikeda, Yoshichika Sato, Tsutomu Tokunaga
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Patent number: 7852296Abstract: 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: GrantFiled: September 8, 2006Date of Patent: December 14, 2010Assignee: Panasonic CorporationInventors: Yoshichika Sato, Tsutomu Tokunaga, Motofumi Ikeda, Masatsugu Onizuka
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Patent number: 7834820Abstract: A plasma display device which allows to make longer a leading period of each sustain pulse belonging to a first group including at least a sustain pulse to be applied secondly in a sustain period of each subfield as compared to a leading period of each sustain pulse belonging to another group including at least one sustain pulse to be applied thirdly or later.Type: GrantFiled: May 26, 2006Date of Patent: November 16, 2010Assignee: Panasonic CorporationInventors: Motofumi Ikeda, Kazuaki Sakata
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Publication number: 20100245303Abstract: 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: ApplicationFiled: June 10, 2010Publication date: September 30, 2010Inventors: Masatsugu ONIZUKA, Motofumi Ikeda, Yoshichika Sato, Tsutomu Tokunaga
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Patent number: 7777695Abstract: A plasma display device which selectively generates address discharge in each display cell in accordance with pixel data based on a video signal in an address period, applies a sustain pulse between row electrodes forming each row electrode pair in a sustain period, and applies, in the sustain period, a discharge timing control pulse to one row electrode of each row electrode pair, so that the discharge timing control pulse partly overlaps with a first sustain pulse in terms of time, which is applied to the other row electrode of each row electrode pair.Type: GrantFiled: June 7, 2006Date of Patent: August 17, 2010Assignee: Panasonic CorportionInventors: Motofumi Ikeda, Yoshichika Sato, Nobuhiko Saegusa, Shigeru Iwaoka
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Patent number: 7742018Abstract: A plasma display device which selectively generates address discharge in each display cell in accordance with pixel data based on a video signal in an address period, applies a sustain pulse between row electrodes forming each row electrode pair in a sustain period, and applies a wall-charge adjusting pulse between row electrodes forming each of said row electrode pairs in a period from an end of the address period to a beginning of the sustain period.Type: GrantFiled: May 31, 2006Date of Patent: June 22, 2010Assignee: Panasonic CorporationInventors: Motofumi Ikeda, Yoshichika Sato
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Patent number: 7724213Abstract: 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: GrantFiled: April 25, 2006Date of Patent: May 25, 2010Assignee: Panasonic CorporationInventors: Motofumi Ikeda, Kazuaki Sakata, Masatsugu Onizuka
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Patent number: 7667670Abstract: A plasma display which can reduce the cost of a heat dissipating structure for a driver IC. A magnesium oxide layer is formed on a surface in contact with a discharge space in each of display cells of a PDP. The magnesium oxide film includes magnesium oxide crystals which are excited by electron beams irradiated thereto to emit cathode luminescence light having a peak in a wavelength range of 200 to 300 nm. Further, a pixel data pulse generator circuit for applying column electrodes with pixel data pulses in accordance with pixel data is divided into and built in a plurality of IC chips. Each of these IC chips is mounted on one of a plurality of flexible wiring boards which are connected to the power supply line and column electrodes, respectively.Type: GrantFiled: December 15, 2005Date of Patent: February 23, 2010Assignee: Panasonic CorporationInventors: Mitsushi Kitagawa, Kazuaki Sakata, Motofumi Ikeda
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Publication number: 20080074354Abstract: A plasma display apparatus in which in an address period, address discharge is generated in each display cell of a display panel selectively in accordance with pixel data based on a video signal, and in a sustain period, a sustain pulse for sustain discharge is applied between row electrodes constituting the row electrode pairs by a predetermined number of times which is preset for each of the subfields, and a length of a front-edge period of the sustain pulse to be applied is adjusted subfield by subfield in accordance with a load level in each subfield.Type: ApplicationFiled: September 11, 2007Publication date: March 27, 2008Inventors: Kazuo Yahagi, Mitsunori Taguchi, Kazuhiro Kanai, Yuichi Sakai, Mitsushi Kitagawa, Yoshichika Sato, Takatoshi Shoji, Motofumi Ikeda
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Publication number: 20070103395Abstract: 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: ApplicationFiled: November 3, 2006Publication date: May 10, 2007Inventors: Masatsugu Onizuka, Motofumi Ikeda, Yoshichika Sato, Tsutomu Tokunaga
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Publication number: 20070057871Abstract: 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: ApplicationFiled: September 6, 2006Publication date: March 15, 2007Inventors: Yoshichika Sato, Motofumi Ikeda, Masatsugu Onizuka
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Publication number: 20070052630Abstract: 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: ApplicationFiled: September 8, 2006Publication date: March 8, 2007Inventors: Yoshichika Sato, Tsutomu Tokunaga, Motofumi Ikeda, Masatsugu Onizuka
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Publication number: 20060290601Abstract: A plasma display device which selectively generates address discharge in each display cell in accordance with pixel data based on a video signal in an address period, applies a sustain pulse between row electrodes forming each row electrode pair in a sustain period, and applies a wall-charge adjusting pulse between row electrodes forming each of said row electrode pairs in a period from an end of the address period to a beginning of the sustain period.Type: ApplicationFiled: May 31, 2006Publication date: December 28, 2006Inventors: Motofumi Ikeda, Yoshichika Sato
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Publication number: 20060290602Abstract: A plasma display device which selectively generates address discharge in each display cell in accordance with pixel data based on a video signal in an address period, applies a sustain pulse between row electrodes forming each row electrode pair in a sustain period, and applies, in the sustain period, a discharge timing control pulse to one row electrode of each row electrode pair, so that the discharge timing control pulse partly overlaps with a first sustain pulse in terms of time, which is applied to the other row electrode of each row electrode pair.Type: ApplicationFiled: June 7, 2006Publication date: December 28, 2006Inventors: Motofumi Ikeda, Yoshichika Sato, Nobuhiko Saegusa, Shigeru Iwaoka
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Publication number: 20060279484Abstract: 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: ApplicationFiled: April 25, 2006Publication date: December 14, 2006Inventors: Motofumi Ikeda, Kazuaki Sakata, Masatsugu Onizuka
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Publication number: 20060267878Abstract: A plasma display device which allows to make longer a leading period of each sustain pulse belonging to a first group including at least a sustain pulse to be applied secondly in a sustain period of each subfield as compared to a leading period of each sustain pulse belonging to another group including at least one sustain pulse to be applied thirdly or later.Type: ApplicationFiled: May 26, 2006Publication date: November 30, 2006Inventors: Motofumi Ikeda, Kazuaki Sakata
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Publication number: 20060158129Abstract: A plasma display which can reduce the cost of a heat dissipating structure for a driver IC. A magnesium oxide layer is formed on a surface in contact with a discharge space in each of display cells of a PDP. The magnesium oxide film includes magnesium oxide crystals which are excited by electron beams irradiated thereto to emit cathode luminescence light having a peak in a wavelength range of 200 to 300 nm. Further, a pixel data pulse generator circuit for applying column electrodes with pixel data pulses in accordance with pixel data is divided into and built in a plurality of IC chips. Each of these IC chips is mounted on one of a plurality of flexible wiring boards which are connected to the power supply line and column electrodes, respectively.Type: ApplicationFiled: December 15, 2005Publication date: July 20, 2006Inventors: Mitsushi Kitagawa, Kazuaki Sakata, Motofumi Ikeda