Patents by Inventor Masafumi Ookawa

Masafumi Ookawa 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: 20090031933
    Abstract: Carbon dioxide in combustion exhaust gas can be effectively separated and the combustion exhaust gas including the other exhaust gas components condensed through the separation of carbon dioxide can be discharged to the atmosphere. Air 7 is separated by an air separation unit 8 into oxygen 9 and other nitrogen-prevailing gas 10a. The obtained oxygen 9 and coal 1 are burned by a burner 5a of a combustion furnace 4. Exhaust gas treatment is conducted for the resultant combustion exhaust gas from the furnace 4. Then, part of the combustion exhaust gas is recirculated to the burner 5a and the remaining unrecirculated combustion exhaust gas is compressed to take out liquefied carbon dioxide 29. The other exhaust gas components 31 unliquefied through the compression is mixed and diluted with the other nitrogen-prevailing gas 10a in the separation of the oxygen 9 from the air 7 in the air separation unit 8 and is discharged to the atmosphere.
    Type: Application
    Filed: November 28, 2006
    Publication date: February 5, 2009
    Applicant: IHI CORPORATION
    Inventors: Masafumi Ookawa, Toshiro Fujimori, Shinichi Takano, Toshihiko Yamada
  • Patent number: 7125306
    Abstract: A method of producing a gas discharge panel includes forming a surrounding unit by positioning a first panel and a second panel together with barrier ribs to partition the space between the panels into cells for light emission when charged with a plasma gas and appropriately addressed. An anti-sealing material inflow rib surrounds the barrier ribs. Sealing material is positioned outside the anti-sealing material inflow rib. The pressure inside the surrounding unit is adjusted to be lower than pressure outside the surrounding unit while applying heat to fuse the sealing material between the first panel and the second panel whereby sealing material is prevented from inflowing into the cells between the barrier ribs during production.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: October 24, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiki Sasaki, Kinzou Nonomura, Junichi Hibino, Hiroyuki Yonehara, Katuyoshi Yamashita, Nobuyuki Kirihara, Kazuo Ootani, Masafumi Ookawa
  • Patent number: 7070471
    Abstract: A manufacturing apparatus for a PDP includes a unit for forming a protective layer protecting a dielectric layer on a first plate, a unit for baking a phosphor layer applied on a second plate, a unit for sealing the first and second plates arranged so that the protective layer faces the phosphor layer, and a unit for baking the first and second plates while exhausting a space between them. The four units are placed in one or more closed chamber. When the apparatus is driven, spaces in and between the closed chambers each contain a gas atmosphere with vapor partial pressure of 10 mPa or lower, or with a pressure of 1 Pa or lower, where the protective layer and the phosphor layer exhibit less water-absorbing property, preventing degradation of the PDP performances. The protective layer does not contact with atmospheric carbonic acid gas, preventing alteration thereof.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: July 4, 2006
    Assignee: Matsushita Electric Industrial Co. Ltd.
    Inventors: Akira Shiokawa, Hiroyosi Tanaka, Yoshiki Sasaki, Masafumi Ookawa, Junichi Hibino
  • Patent number: 7014522
    Abstract: Barrier ribs 18 formed on a back substrate PA2 are brought into contact with a bonding paste layer 40 having an even surface, applying a bonding agent Bd evenly to the tops of the barrier ribs. Furthermore, a gas discharge panel having a structure in which discharge mainly occurs at locations distanced from parts of the panel connected using the bonding agent Bd is realized.
    Type: Grant
    Filed: March 1, 2004
    Date of Patent: March 21, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Junichi Hibino, Choujurou Yamamitsu, Hiroyuki Yonehara, Yoshiki Sasaki, Katuyoshi Yamashita, Nobuyuki Kirihara, Kazuo Ootani, Yuusuke Takada, Hideaki Yasui, Ryuichi Murai, Hidetaka Hiagshino, Nobuaki Nagao, Masafumi Ookawa, Hiroyosi Tanaka
  • Patent number: 6935916
    Abstract: A manufacturing method for a gas discharge panel according to the invention can reduce the amount of water and gaseous molecules, which are absorbed into the first and the second substrates, to a minimum by keeping the both substrates under a reduced pressure, and therefore can prevent a degradation of a discharge gas filling the finished panel. As a result, problems in the finished panel such as increase in a discharge starting voltage and generation of an abnormal discharge can be suppressed.
    Type: Grant
    Filed: July 9, 2003
    Date of Patent: August 30, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiki Sasaki, Junichi Hibino, Hiroyosi Tanaka, Akira Shiokawa, Masafumi Ookawa
  • Publication number: 20050151475
    Abstract: A method is provided to steadily produce a gas discharge panel, such as a PDP, in which a panel and the top of the barrier ribs are in intimate contact in entirety. First a surrounding unit for the gas discharge panel is formed, then a process for sealing the surrounding unit with a sealing material inserted between two panels at the rim is performed while pressure is adjusted so that pressure inside the surrounding unit is lower than pressure outside. With this construction, the panels constituting the surrounding unit are bonded together while they are pressurized from outside. As a result, a panel and the top of the barrier ribs on the other panel are bonded together while they are in intimate contact in entirety. To fully acquire these effects, it is preferable that the adjustment of pressure starts before the sealing material hardens.
    Type: Application
    Filed: November 23, 2004
    Publication date: July 14, 2005
    Inventors: Yoshiki Sasaki, Kinzou Nonomura, Junichi Hibino, Hiroyuki Yohehara, Katuyoshi Yamashita, Nobuyuki Kirihara, Kazuo Ootani, Masafumi Ookawa
  • Patent number: 6910938
    Abstract: A manufacturing method for a gas discharge panel according to the invention can reduce the amount of water and gaseous molecules, which are absorbed into the first and the second substrates, to a minimum by keeping the both substrates under a reduced pressure, and therefore can prevent a degradation of a discharge gas filling the finished panel. As a result, problems in the finished panel such as increase in a discharge starting voltage and generation of an abnormal discharge can be suppressed.
    Type: Grant
    Filed: July 9, 2003
    Date of Patent: June 28, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiki Sasaki, Junichi Hibino, Hiroyosi Tanaka, Akira Shiokawa, Masafumi Ookawa
  • Patent number: 6900598
    Abstract: When a gas discharge panel is driven, a voltage is applied between scan and address electrode groups to perform set-up. The voltage waveform has four intervals. In a first interval, the voltage is raised in a short time (less than 10 ?s) to a first voltage, wherein 100 V?first voltage<starting voltage. Then, in a second interval, the voltage is raised to a second voltage no less than the starting voltage and with an absolute gradient smaller than that for the voltage rise in the first interval (no more than 9 V/?s). Next, in a third interval, the voltage is lowered in a short time (no more than 10 ?s) from the second voltage to a third voltage no more than the starting voltage. Following this, in a fourth interval, the voltage is lowered still further (for 100 ?s to 250 ?s) with a gradient smaller than that for the voltage fall in the third interval. The time occupied by the whole voltage waveform should be no more, than 360 ?s.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: May 31, 2005
    Assignee: Matsushita Electric Company Co., Ltd.
    Inventors: Junichi Hibino, Hidetaka Higashino, Nobuaki Nagao, Masaru Sekizawa, Kanako Miyashita, Masafumi Ookawa
  • Patent number: 6860781
    Abstract: Barrier ribs 18 formed on a back substrate PA2 are brought into contact with a bonding paste layer 40 having an even surface, applying a bonding agent Bd evenly to the tops of the barrier ribs. Furthermore, a gas discharge panel having a structure in which discharge mainly occurs at locations distanced from parts of the panel connected using the bonding agent Bd is realized.
    Type: Grant
    Filed: March 1, 2004
    Date of Patent: March 1, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Junichi Hibino, Choujurou Yamamitsu, Hiroyuki Yonehara, Yoshiki Sasaki, Katuyoshi Yamashita, Nobuyuki Kirihara, Kazuo Ootani, Yuusuke Takada, Hideaki Yasui, Ryuichi Murai, Hidetaka Hiagshino, Nobuaki Nagao, Masafumi Ookawa, Hiroyosi Tanaka
  • Patent number: 6848964
    Abstract: A method is provided to steadily produce a gas discharge panel, such as a PDP, in which a panel and the top of the barrier ribs are in intimate contact in entirety. First a surrounding unit for the gas discharge panel is formed, then a process for sealing the surrounding unit with a sealing material inserted between two panels at the rim is performed while pressure is adjusted so that pressure inside the surrounding unit is lower than pressure outside. With this construction, the panels constituting the surrounding unit are bonded together while they are pressurized from outside. As a result, a panel and the top of the barrier ribs on the other panel are bonded together while they are in intimate contact in entirety. To fully acquire these effects, it is preferable that the adjustment of pressure starts before the sealing material hardens.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: February 1, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshiki Sasaki, Kinzou Nonomura, Junichi Hibino, Hiroyuki Yonehara, Katuyoshi Yamashita, Nobuyuki Kirihara, Kazuo Ootani, Masafumi Ookawa
  • Patent number: 6820985
    Abstract: To provide a display panel, such as a PDP, that can reduce noise caused by a collision sound which occurs when a front panel member and a back panel member vibrate while the display panel is being driven. Projections (21) are provided on a surface of a first panel member facing a second panel member. The first panel member and the second panel member are connected to each other by a connecting material in areas (23) where the projections intersect barrier ribs (18). In this way, noise (noise level) caused by a collision sound which occurs when the front panel member and the back panel member vibrate while the display panel is being driven can be reduced.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: November 23, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masafumi Ookawa, Junichi Hibino, Yoshiki Sasaki, Katuyoshi Yamashita
  • Patent number: 6803723
    Abstract: A plasma display device has a first plate and a second plate which face each other with a discharge space therebetween, and a sealing member which is provided between the first and second plates to seal the discharge space at edges of the first and second plates. A plurality of electrodes are formed on the inner major surface of the first or second plate. An electrode diffusion preventive layer is formed in each area where the plurality of electrodes cross over the sealing member, so as to avoid direct contact between the plurality of electrodes and the sealing member. As a result, problems such as breaking of the electrodes can be avoided. This construction is especially effective when the electrodes contain Ag.
    Type: Grant
    Filed: July 30, 2002
    Date of Patent: October 12, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Katuyoshi Yamashita, Yoshiki Sasaki, Junichi Hibino, Masafumi Ookawa, Masaki Aoki
  • Patent number: 6800010
    Abstract: Barrier ribs 18 formed on a back substrate PA2 are brought into contact with a bonding paste layer 40 having an even surface, applying a bonding agent Bd evenly to the tops of the barrier ribs. Furthermore, a gas discharge panel having a structure in which discharge mainly occurs at locations distanced from parts of the panel connected using the bonding agent Bd is realized.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: October 5, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Junichi Hibino, Choujurou Yamamitsu, Hiroyuki Yonehara, Yoshiki Sasaki, Katuyoshi Yamashita, Nobuyuki Kirihara, Kazuo Ootani, Yuusuke Takada, Hideaki Yasui, Ryuichi Murai, Hidetaka Hiagshino, Nobuaki Nagao, Masafumi Ookawa, Hiroyosi Tanaka
  • Publication number: 20040169927
    Abstract: To provide a display panel, such as a PDP, that can reduce noise caused by a collision sound which occurs when a front panel member and a back panel member vibrate while the display panel is being driven. Projections (21) are provided on a surface of a first panel member facing a second panel member. The first panel member and the second panel member are connected to each other by a connecting material in areas (23) where the projections intersect barrier ribs (18). In this way, noise (noise level) caused by a collision sound which occurs when the front panel member and the back panel member vibrate while the display panel is being driven can be reduced.
    Type: Application
    Filed: March 5, 2004
    Publication date: September 2, 2004
    Inventors: Masafumi Ookawa, Junichi Hibino, Yoshiki Sasaki, Katuyoshi Yamashita
  • Publication number: 20040164679
    Abstract: Barrier ribs 18 formed on a back substrate PA2 are brought into contact with a bonding paste layer 40 having an even surface, applying a bonding agent Bd evenly to the tops of the barrier ribs.
    Type: Application
    Filed: March 1, 2004
    Publication date: August 26, 2004
    Inventors: Junichi Hibino, Choujurou Yamamitsu, Hiroyuki Yonehara, Yoshiki Sasaki, Katuyoshi Yamashita, Nobuyuki Kirihara, Kazuo Ootani, Yuusuke Takada, Hideaki Yasui, Ryuichi Murai, Hidetaka Hiagshino, Nobuaki Nagao, Masafumi Ookawa, Hiroyosi Tanaka
  • Publication number: 20040164678
    Abstract: Barrier ribs 18 formed on a back substrate PA2 are brought into contact with a bonding paste layer 40 having an even surface, applying a bonding agent Bd evenly to the tops of the barrier ribs.
    Type: Application
    Filed: March 1, 2004
    Publication date: August 26, 2004
    Inventors: Junichi Hibino, Choujurou Yamamitsu, Hiroyuki Yonehara, Yoshiki Sasaki, Katuyoshi Yamashita, Nobuyuki Kirihara, Kazuo Ootani, Yuusuke Takada, Hideaki Yasui, Ryuichi Murai, Hidetaka Hiagshino, Nobuaki Nagao, Masafumi Ookawa, Hiroyosi Tanaka
  • Publication number: 20040106350
    Abstract: A manufacturing method for a gas discharge panel according to the invention can reduce the amount of water and gaseous molecules, which are absorbed into the first and the second substrates, to a minimum by keeping the both substrates under a reduced pressure, and therefore can prevent a degradation of a discharge gas filling the finished panel. As a result, problems in the finished panel such as increase in a discharge starting voltage and generation of an abnormal discharge can be suppressed.
    Type: Application
    Filed: July 9, 2003
    Publication date: June 3, 2004
    Inventors: Yoshiki Sasaki, Junichi Hibino, Hiroyosi Tanaka, Akira Shiokawa, Masafumi Ookawa
  • Patent number: 6738033
    Abstract: When a gas discharge panel is driven, a voltage is applied between scan and address electrode groups to perform set-up. The voltage waveform has four intervals. In a first interval, the voltage is raised in a short time (less than 10 &mgr;s) to a first voltage, wherein 100 V≦first voltage<starting voltage. Then, in a second interval, the voltage is raised to a second voltage no less than the starting voltage and with an absolute gradient smaller than that for the voltage rise in the first interval (no more than 9 V/&mgr;s). Next, in a third interval, the voltage is lowered in a short time (no more than 10 &mgr;s) from the second voltage to a third voltage no more than the starting voltage. Following this, in a fourth interval, the voltage is lowered still further (for 100 &mgr;s to 250 &mgr;s) with a gradient smaller than that for the voltage fall in the third interval. The time occupied by the whole voltage waveform should be no more than 360 &mgr;s.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: May 18, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Junichi Hibino, Hidetaka Higashino, Nobuaki Nagao, Masaru Sekizawa, Kanako Miyashita, Masafumi Ookawa
  • Publication number: 20040080280
    Abstract: When a gas discharge panel is driven, a voltage is applied between scan and address electrode groups to perform set-up. The voltage waveform has four intervals. In a first interval, the voltage is raised in a short time (less than 10 &mgr;s) to a first voltage, wherein 100 V≦first voltage<starting voltage. Then, in a second interval, the voltage is raised to a second voltage no less than the starting voltage and with an absolute gradient smaller than that for the voltage rise in the first interval (no more than 9 V/&mgr;s). Next, in a third interval, the voltage is lowered in a short time (no more than 10 &mgr;s) from the second voltage to a third voltage no more than the starting voltage. Following this, in a fourth interval, the voltage is lowered still further (for 100 &mgr;s to 250 &mgr;s) with a gradient smaller than that for the voltage fall in the third interval. The time occupied by the whole voltage waveform should be no more, than 360 &mgr;s.
    Type: Application
    Filed: October 9, 2003
    Publication date: April 29, 2004
    Inventors: Junichi Hibino, Hidetaka Higashino, Nobuaki Nagao, Masaru Sekizawa, Kanako Miyashita, Masafumi Ookawa
  • Patent number: RE41465
    Abstract: A plasma display device has a first plate and a second plate which face each other with a discharge space therebetween, and a sealing member which is provided between the first and second plates to seal the discharge space at edges of the first and second plates. A plurality of electrodes are formed on the inner major surface of the first or second plate. An electrode diffusion preventive layer is formed in each area where the plurality of electrodes cross over the sealing member, so as to avoid direct contact between the plurality of electrodes and the sealing member. As a result, problems such as breaking of the electrodes can be avoided. This construction is especially effective when the electrodes contain Ag.
    Type: Grant
    Filed: October 10, 2000
    Date of Patent: August 3, 2010
    Assignee: Panasonic Corporation
    Inventors: Katsuyoshi Yamashita, Yoshiki Sasaki, Junichi Hibino, Masafumi Ookawa, Masaki Aoki