Patents by Inventor Fumito Kusama
Fumito Kusama 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: 9356516Abstract: A driving apparatus includes a first potential line that applies a first potential, a second potential line that applies a second potential, a coil including a first terminal and a second second terminal that is connected to a control terminal of a switching element, a charging switch connected between the first potential line and the first terminal of the coil, a clamp switch provided between the first potential line and the second terminal of the coil, a reverse-flow blocking diode connected in series with the clamp switch between the first potential line and the second terminal of the coil, and a control circuit that controls the charging switch and the clamp switch.Type: GrantFiled: November 1, 2014Date of Patent: May 31, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Fumito Kusama, Hajime Hida, Shun Kazama, Kenji Hanamura
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Publication number: 20150137857Abstract: A driving apparatus includes a first potential line that applies a first potential, a second potential line that applies a second potential, a coil including a first terminal and a second second terminal that is connected to a control terminal of a switching element, a charging switch connected between the first potential line and the first terminal of the coil, a clamp switch provided between the first potential line and the second terminal of the coil, a reverse-flow blocking diode connected in series with the clamp switch between the first potential line and the second terminal of the coil, and a control circuit that controls the charging switch and the clamp switch.Type: ApplicationFiled: November 1, 2014Publication date: May 21, 2015Inventors: Fumito KUSAMA, Hajime HIDA, Shun KAZAMA, Kenji HANAMURA
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Publication number: 20150138858Abstract: A driving apparatus of the present disclosure includes a coil including a second terminal connected to a control terminal of a switching element, a charging switch connected between a first potential line and a first terminal of the coil, a clamp switch connected between the first potential line and the control terminal of the switching element, a charging diode connected between a second potential line and the first terminal of the coil, and a control circuit that outputs a charging control signal for turning on the charging switch and for turning off the charging switch before a potential of the control terminal of the switching element reaches the first potential and a clamp control signal for turning on the clamp switch after the charging switch is turned on.Type: ApplicationFiled: November 1, 2014Publication date: May 21, 2015Inventors: FUMITO KUSAMA, HAJIME HIDA, SHUN KAZAMA, KENJI HANAMURA
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Patent number: 8159487Abstract: A plasma display device includes a scan electrode drive circuit including a sustain pulse generating circuit, which includes an electric power recovery capacitor, a first recovery switch and a first recovery inductor connected in series so as to form an electric current passage in which an electric current is allowed to flow from the electric power recovery capacitor to a scan electrode, a second recovery switch and a second recovery inductor connected in series so as to form an electric current passage in which an electric current is allowed to flow from the scan electrode to the electric power recovery capacitor, a first damper capacitor connected to a node between a diode of the first recovery switch and the first recovery inductor, and a second damper capacitor connected to a node between a diode of the second recovery switch and the second recovery inductor.Type: GrantFiled: July 25, 2008Date of Patent: April 17, 2012Assignee: Panasonic CorporationInventors: Fumito Kusama, Masaaki Kuranuki, Hironori Konno
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Patent number: 8085221Abstract: A method drives a panel and a plasma display unit, wherein one field includes a plurality of subfields, each having an addressing period for producing an address discharge selectively in the discharge cells, and a sustaining period for producing a sustain discharge by applying a number of sustaining pulses corresponding to a weight of brightness in a discharge cell where the address discharge has been produced. Additionally, a sustaining pulse generator circuit includes a power recovery section for controlling the rising or the falling of the sustaining pulse by producing resonance between an inter-electrode capacitance of a display electrode pair and an inductor, and a clamping section for clamping a voltage of the sustaining pulse at a predetermined potential, wherein the power recovery section is used to set twice a time of the rising of the sustaining pulse to be equal to or longer than a duration of the sustaining pulse.Type: GrantFiled: February 13, 2007Date of Patent: December 27, 2011Assignee: Panasonic CorporationInventors: Yutaka Yoshihama, Shigeo Kigo, Kazuyoshi Nakamura, Kenji Sasaki, Fumito Kusama
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Publication number: 20100164927Abstract: A plasma display device includes a scan electrode drive circuit including a sustain pulse generating circuit, which includes an electric power recovery capacitor, a first recovery switch and a first recovery inductor connected in series so as to form an electric current passage in which an electric current is allowed to flow from the electric power recovery capacitor to a scan electrode, a second recovery switch and a second recovery inductor connected in series so as to form an electric current passage in which an electric current is allowed to flow from the scan electrode to the electric power recovery capacitor, a first damper capacitor connected to a node between a diode of the first recovery switch and the first recovery inductor, and a second damper capacitor connected to a node between a diode of the second recovery switch and the second recovery inductor.Type: ApplicationFiled: July 25, 2008Publication date: July 1, 2010Applicant: PANASONIC CORPORATIONInventors: Fumito Kusama, Masaaki Kuranuki, Hironori Konno
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Publication number: 20090096718Abstract: The plasma display device has the following structure: a panel having a plurality of discharge cells; an electrode-dedicated power supply for generating voltage to be applied to any one of the electrodes disposed on the panel; a driving-waveform generator that has a switching element for outputting voltage of the electrode-dedicated power supply so as to generate a waveform of driving voltage for driving the electrodes; a switch controller for controlling the switching element; a controller-dedicated power supply for supplying the switch controller with electric power; and an auxiliary power supply that generates a voltage lower than that of the controller-dedicated power supply by reducing voltage of the electrode-dedicated power supply so as to supply the switch controller with electric power.Type: ApplicationFiled: January 9, 2008Publication date: April 16, 2009Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Fumito Kusama, Tosikazu Nagaki, Masaaki Kuranuki
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Publication number: 20090009435Abstract: A method of driving a panel and a plasma display unit is provided, wherein one field comprises a plurality of subfields, each having an addressing period for producing an address discharge selectively in any of discharge cells, and a sustaining period for producing a sustain discharge by applying a number of sustaining pulses corresponding to a weight of brightness in the discharge cell where the address discharge has been produced. Provided therein is a sustaining pulse generator circuit comprising a power recovery section for rising or falling the sustaining pulse by producing resonance between an inter-electrode capacitance of a display electrode pair and an inductor, and a clamping section for clamping a voltage of the sustaining pulse at a predetermined potential, wherein the power recovery section is used to set twice a time of rising the sustaining pulse to become equal to or longer than a duration of the sustaining pulse.Type: ApplicationFiled: February 13, 2007Publication date: January 8, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yutaka Yoshihama, Shigeo Kigo, Kazuyoshi Nakamura, Kenji Sasaki, Fumito Kusama
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Patent number: 7471264Abstract: A reset pulse generating section applies the total of voltages of a positive voltage source and two constant-voltage sources from a high side ramp wave generating section to a high side scan switching device as the upper limit of a reset voltage pulse, and applies the ground potential from a low side ramp wave generating section to a low side scan switching device as the lower limit of the reset voltage pulse. A sustaining pulse generating section applies the upper and lower limits of a sustaining voltage pulse through a common sustaining pulse transmission path to the low side scan switching device.Type: GrantFiled: April 4, 2005Date of Patent: December 30, 2008Assignee: Panasonic CorporationInventors: Manabu Inoue, Satoshi Ikeda, Yasuhiro Arai, Toshikazu Nagaki, Hideki Nakata, Jumpei Hashiguchi, Fumito Kusama
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Publication number: 20050285820Abstract: A reset pulse generating section applies the total of voltages of a positive voltage source and two constant-voltage sources from a high side ramp wave generating section to a high side scan switching device as the upper limit of a reset voltage pulse, and applies the ground potential from a low side ramp wave generating section to a low side scan switching device as the lower limit of the reset voltage pulse. A sustaining pulse generating section applies the upper and lower limits of a sustaining voltage pulse through a common sustaining pulse transmission path to the low side scan switching device.Type: ApplicationFiled: April 4, 2005Publication date: December 29, 2005Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Manabu Inoue, Satoshi Ikeda, Yasuhiro Arai, Toshikazu Nagaki, Hideki Nakata, Jumpei Hashiguchi, Fumito Kusama