Patents by Inventor Katuyoshi Yamashita

Katuyoshi Yamashita 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: 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: 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
  • 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: 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: 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: 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
  • Patent number: 6692325
    Abstract: The present invention provides a gas discharge panel on which color images are accurately displayed and which is easy to manufacture. The first and the second substrates face each other across an interval, forming a discharge space in between, which is filled with a discharge gas. Pairs of electrodes for sustaining discharge are provided on at least one of the two substrates, and phosphor layers are formed on the first substrate, arranged along the electrode pairs to form a matrix of discharge cells. An image is displayed by selectively illuminating discharge cells. Gap members having a given shape are provided between the first and second substrates at locations corresponding to the boundaries between discharge cells.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: February 17, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Junichi Hibino, Yoshiki Sasaki, Katuyoshi Yamashita, Masafumi Ookawa, Tetsuo Hori
  • Publication number: 20030076039
    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: October 11, 2002
    Publication date: April 24, 2003
    Inventors: Masafumi Ookawa, Junichi Hibino, Yoshiki Sasaki, Katuyoshi Yamashita
  • Patent number: 6328621
    Abstract: Method and apparatus for manufacturing an electron gun. A beam spot coefficient is obtained from an electrostatic lens magnification and a spherical aberration coefficient of a set resistance distribution. Then, a first process loop is executed to select another resistance distribution that provides an approximate minimum value of the beam spot coefficient. It is then determined whether the beam spot coefficient is an approximate minimum value. The first process loop is repeatedly executed until the beam spot coefficient is determined to be equal to the approximate minimum value. At this point, a second process loop is executed to confirm the minimum value of the beam spot coefficient using an aberration-independent function that is dependent upon the electrostatic lens magnification and is not dependent upon the spherical aberration coefficient.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: December 11, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masatoshi Kudoh, Ryuichi Murai, Mitsuhiro Ohtani, Katuyoshi Yamashita, Hideharu Ohmae, Masahiko Konda
  • Publication number: 20010024922
    Abstract: Method and apparatus for manufacturing an electron gun. A beam spot coefficient is obtained from an electrostatic lens magnification and a spherical aberration coefficient of a set resistance distribution. Then, a first process loop is executed to select another resistance distribution that provides an approximate minimum value of the beam spot coefficient. It is then determined whether the beam spot coefficient is an approximate minimum value. The first process loop is repeatedly executed until the beam spot coefficient is determined to be equal to the approximate minimum value. At this point, a second process loop is executed to confirm the minimum value of the beam spot coefficient using an aberration-independent function that is dependent upon the electrostatic lens magnification and is not dependent upon the spherical aberration coefficient.
    Type: Application
    Filed: May 1, 2001
    Publication date: September 27, 2001
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., Ltd.
    Inventors: Masatoshi Kudoh, Ryuichi Murai, Mitsuhiro Ohtani, Katuyoshi Yamashita, Hideharu Ohmae, Masahiko Konda
  • Patent number: 6270390
    Abstract: Method and apparatus for manufacturing an electron gun. A beam spot coefficient is obtained from an electrostatic lens magnification and a spherical aberration coefficient of a set resistance distribution. Then, a first process loop is executed to select another resistance distribution that provides an approximate minimum value of the beam spot coefficient. It is then determined whether the beam spot coefficient is an approximate minimum value. The first process loop is repeatedly executed until the beam spot coefficient is determined to be equal to the approximate minimum value. At this point, a second process loop is executed to confirm the minimum value of the beam spot coefficient using an aberration-independent function that is dependent upon the electrostatic lens magnification and is not dependent upon the spherical aberration coefficient.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: August 7, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masatoshi Kudoh, Ryuichi Murai, Mitsuhiro Ohtani, Katuyoshi Yamashita, Hideharu Ohmae, Masahiko Konda