Patents by Inventor Norihiro Uemura

Norihiro Uemura 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: 20080218439
    Abstract: A plasma display panel and an imaging device realize a high luminous efficiency, a long lifetime and stable driving. The plasma display panel uses a discharge-gas mixture containing at least Xe, Ne and He. A Xe proportion of the discharge-gas mixture is in a range of from 2% to 20%, a He proportion of the discharge-gas mixture is in a range of from 15% to 50%, the He proportion is greater than the Xe proportion, and a total pressure of the discharge-gas mixture is in a range of from 400 Torr to 550 Torr. A width of a voltage pulse to be applied to an electrode serving as an address electrode is 2 ?s or less.
    Type: Application
    Filed: May 15, 2008
    Publication date: September 11, 2008
    Inventors: Norihiro UEMURA, Keizo SUZUKI, Hiroshi KAJIYAMA, Yusule YAJIMA, Masayuki SHIBATA, Yoshimi KAWANAMI, Koji OHIRA, Ikuo OZAKI
  • Publication number: 20060232511
    Abstract: Conventionally, when a thickness of a dielectric layer is reduced without changing an electrode shape, a drive margin is reduced and stable driving cannot be performed. In a discharge cell, a display electrode comprises a projection extending in a column direction from an electrode body extending in a row direction, the projection forms a discharge gap together with an adjacent paired projection of the other display electrode, the projection includes a first projection and a second projection having two kinds of widths in a row direction, and when a ratio of widths of the second projection on the discharge gap side to the first projection on the electrode body side is assumed as Y and a thickness of the dielectric layer as X [?m], Y?0.2·X, X?20 and Y?0.5 are satisfied.
    Type: Application
    Filed: March 30, 2006
    Publication date: October 19, 2006
    Inventors: Norihiro Uemura, Masayuki Shibata, Hideki Harada, Yoshimi Kawanami, Osamu Toyoda
  • Publication number: 20060192732
    Abstract: A plasma display panel and an imaging device realize a high luminous efficiency, a long lifetime and stable driving. The plasma display panel uses a discharge-gas mixture containing at least Xe, Ne and He. A Xe proportion of the discharge-gas mixture is in a range of from 2% to 20%, a He proportion of the discharge-gas mixture is in a range of from 15% to 50%, the He proportion is greater than the Xe proportion, and a total pressure of the discharge-gas mixture is in a range of from 400 Torr to 550 Torr. A width of a voltage pulse to be applied to an electrode serving as an address electrode is 2 ?s or less.
    Type: Application
    Filed: April 4, 2006
    Publication date: August 31, 2006
    Inventors: Norihiro Uemura, Keizo Suzuki, Hiroshi Kajiyama, Yusuke Yajima, Masayuki Shibata, Yoshimi Kawanami, Koji Ohira, Ikuo Ozaki
  • Patent number: 7071901
    Abstract: A plasma display panel and an imaging device realize a high luminous efficiency, a long lifetime and stable driving. The plasma display panel uses a discharge-gas mixture containing at least Xe, Ne and He. A Xe proportion of the discharge-gas mixture is in a range of from 2% to 20%, a He proportion of the discharge-gas mixture is in a range of from 15% to 50%, the He proportion is greater than the Xe proportion, and a total pressure of the discharge-gas mixture is in a range of from 400 Torr to 550 Torr. A width of a voltage pulse to be applied to an electrode serving as an address electrode is 2 ?s or less.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: July 4, 2006
    Assignees: Hitachi, Ltd., Fujitsu Hitachi Plasma Display Ltd.
    Inventors: Norihiro Uemura, Keizo Suzuki, Hiroshi Kajiyama, Yusuke Yajima, Masayuki Shibata, Yoshimi Kawanami, Koji Ohira, Ikuo Ozaki
  • Publication number: 20050052362
    Abstract: A plasma display panel and an imaging device realize a high luminous efficiency, a long lifetime and stable driving. The plasma display panel uses a discharge-gas mixture containing at least Xe, Ne and He. A Xe proportion of the discharge-gas mixture is in a range of from 2% to 20%, a He proportion of the discharge-gas mixture is in a range of from 15% to 50%, the He proportion is greater than the Xe proportion, and a total pressure of the discharge-gas mixture is in a range of from 400 Torr to 550 Torr. A width of a voltage pulse to be applied to an electrode serving as an address electrode is 2 ?s or less.
    Type: Application
    Filed: October 12, 2004
    Publication date: March 10, 2005
    Inventors: Norihiro Uemura, Keizo Suzuki, Hiroshi Kajiyama, Yusuke Yajima, Masayuki Shibata, Yoshimi Kawanami, Koji Ohira, Ikuo Ozaki
  • Patent number: 6822627
    Abstract: There are provided a plasma display panel and an imaging device which realize a high luminous efficiency, guaranteed long lifetime and stable driving. The plasma display panel uses a discharge-gas mixture containing at least Xe, Ne and He. A Xe proportion of the discharge-gas mixture is in a range of from 2% to 20%, a He proportion of the discharge-gas mixture is in a range of from 15% to 50%, the He proportion is greater than the Xe proportion, and a total pressure of the discharge-gas mixture is in a range of from 400 Torr to 550 Torr. A width of a voltage pulse to be applied to an address electrode is 2 &mgr;s or less.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: November 23, 2004
    Assignees: Hitachi, Ltd., Fujitsu Hitachi Plasma Display Ltd.
    Inventors: Norihiro Uemura, Keizo Suzuki, Hiroshi Kajiyama, Yusuke Yajima, Masayuki Shibata, Yoshimi Kawanami, Koji Ohira, Ikuo Ozaki
  • Publication number: 20030218579
    Abstract: There are provided a plasma display panel and an imaging device which realize a high luminous efficiency, guaranteed long lifetime and stable driving. The plasma display panel uses a discharge-gas mixture containing at least Xe, Ne and He. A Xe proportion of the discharge-gas mixture is in a range of from 2% to 20%, a He proportion of the discharge-gas mixture is in a range of from 15% to 50%, the He proportion is greater than the Xe proportion, and a total pressure of the discharge-gas mixture is in a range of from 400 Torr to 550 Torr. A width of a voltage pulse to be applied to an address electrode is 2 &mgr;s or less.
    Type: Application
    Filed: August 19, 2002
    Publication date: November 27, 2003
    Applicants: Hitachi, Ltd., Fujitsu Hitachi Plasma Display Ltd.
    Inventors: Norihiro Uemura, Keizo Suzuki, Hiroshi Kajiyama, Yusuke Yajima, Masayuki Shibata, Yoshimi Kawanami, Koji Ohira, Ikuo Ozaki
  • Patent number: 6653995
    Abstract: The plasma display device includes a plasma display panel 101 having a plurality of discharge cells each having a pair of sustained discharge electrodes 102 and 103 and an address electrode 104. A voltage is applied to at least one of the sustained discharge electrodes and the address electrode in a sustained discharge period. A sustained discharge voltage is repeatedly applied to the sustained discharge electrodes 102 and 103. The sustained discharge voltage has a voltage waveform with a rise period (Tr) from a first voltage level to a second voltage level, a sustained period (Tsus) for maintaining the second voltage level, a fall period (Tf) from the second voltage level to the first voltage level and a sustained period (Tg) for maintaining the first voltage level.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: November 25, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Shirun Ho, Keizo Suzuki, Kenichi Yamamoto, Norihiro Uemura
  • Patent number: 6650063
    Abstract: A plasma display panel comprises a transparent front panel plate including a display electrode and a protective layer covering at least the display electrode, a back panel plate, a discharge space formed by adhering the transparent front panel plate and the back panel plate to each other, and a phosphor layer formed to be exposed to the inside of the discharge space. The protective layer is made of a first metal oxide layer formed to cover the display electrode, and a second metal oxide layer formed to cover the first metal oxide layer. The linear thermal expansion coefficient of the second metal oxide layer is larger than that of the first metal oxide layer.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: November 18, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Norihiro Uemura, Kazutaka Tsuji, Keizo Suzuki, Hiroshi Kajiyama
  • Publication number: 20030090206
    Abstract: Disclosed is a plasma display panel comprising a transparent front panel plate comprising a display electrode and a metal oxide layer covering at least the display electrode, a back panel plate, a discharge space formed by adhering the transparent front panel plate and the back panel plate to each other, and a phosphor layer formed to be exposed to the inside of the discharge space. The metal oxide layer is made of a first metal oxide layer formed to cover the display electrode, and a second metal oxide layer formed to cover the first metal oxide layer, and the linear thermal expansion coefficient of the second metal oxide layer is larger than that of the first metal oxide layer. Using this metal oxide layer having the bi-layered structure as a protective layer for the display electrode, a plasma display panel capable of displaying highly minute images can be produced at low costs.
    Type: Application
    Filed: February 26, 2002
    Publication date: May 15, 2003
    Inventors: Norihiro Uemura, Kazutaka Tsuji, Keizo Suzuki, Hiroshi Kajiyama
  • Publication number: 20020196209
    Abstract: The present invention provides a control method for applying a voltage on a plasma display panel of a plasma display device that realizes an improvement in a ultraviolet emission efficiency.
    Type: Application
    Filed: August 30, 2001
    Publication date: December 26, 2002
    Inventors: Shirun Ho, Keizo Suzuki, Kenichi Yamamoto, Norihiro Uemura