Patents by Inventor Koji Ohira

Koji Ohira 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: 7548024
    Abstract: A plasma display panel includes first and second substrates opposed to each other for defining a space filled with discharge gas, a screen made up of cells arranged in the row and column directions, display electrodes arranged on the first substrate, the display electrodes extending in the row direction, band-like partitions arranged in parallel on the second substrate for dividing the gas filled space into columns, and fluorescent material layers sticking to side faces of the partitions and inner surfaces between the partitions on the columns, each of the fluorescent material layers extending across cells. The thickness of the fluorescent material layer at a part sticking to the side face of the partition and overlapping with the display electrodes is designed to be smaller than the thickness at a part sticking to the side face of the partition in the vicinity of the surface discharge gap.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: June 16, 2009
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Noriaki Setoguchi, Koji Ohira
  • Publication number: 20090121631
    Abstract: A plasma display panel production method is provided for producing a plasma display panel including a first substrate, a second substrate opposed to the first substrate, a barrier rib partitioning a space defined between the first and second substrates into a plurality of discharge spaces, and a seal frit portion provided between peripheral inner surface portions of the first and second substrates to seal the first and second substrates.
    Type: Application
    Filed: August 26, 2005
    Publication date: May 14, 2009
    Inventors: Masahiro Sawa, Koji Ohira
  • Publication number: 20090079880
    Abstract: A correction circuit comprised of a capacitor and a switch is attached to a resonator such that a single resonance circuit is used to cover the television signals of a plurality of bands. Furthermore, the number of the components in the tuner circuit is reduced. A television tuner functions to receive a television broadcast signal divided into a plurality of frequency bands for conversion into an intermediate frequency signal of a predetermined frequency. The television tuner includes a resonance circuit controlling a frequency of a local oscillation signal which oscillates within a predetermined frequency band. During reception of a first frequency band, a tuning voltage is applied to a variable circuit element included in the resonance circuit to control the frequency of the local oscillation signal.
    Type: Application
    Filed: March 30, 2006
    Publication date: March 26, 2009
    Applicants: SANYO ELECTRIC CO., LTD., SANYO TUNER INDUSTRIES CO., LTD.
    Inventor: Koji Ohira
  • Publication number: 20090021167
    Abstract: A technology capable of preventing or suppressing a display defect in a PDP (detrimental effect due to local contamination of the display area caused by admixture of impurity gas at the time of introducing discharge gas) is provided. In a PDP, first barrier ribs and first phosphors formed between the first barrier ribs are provided so as to correspond to a display area. In a non-display area outside the display area, an air hole for evacuation from a discharge space and gas filling into the discharge space is provided in a part of an outer perimeter of the panel. Further, an area in which second phosphors having a property of absorbing impurity gas are formed is formed at a position between the display area and the air hole in a part of the non-display area, in particular, in a part of a dummy rib area.
    Type: Application
    Filed: July 15, 2008
    Publication date: January 22, 2009
    Inventors: Koji OHIRA, Tomohiko Murase, Minoru Fukui, Taisuke Yamamoto
  • Patent number: 7450090
    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: April 4, 2006
    Date of Patent: November 11, 2008
    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: 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
  • Patent number: 7379032
    Abstract: A plasma display device is provided that can realize a stable progressive display using a plasma display panel that has a shared type arrangement form of display electrodes. A plasma display panel structure including display electrodes having a shape that has little variation of electrode area between cells and a driving sequence are combined in which the addressing step is divided into the first half and the second half. One of the first half addressing and the second half addressing is performed for a row on which the first display electrode is arranged that has an odd arrangement order when noting only the first display electrodes that are not used for row selection, and the other of the first half addressing and the second half addressing is performed for a row on which the first display electrode is arranged that has an even arrangement order.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: May 27, 2008
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Koji Ohira, Yoshimi Kawanami, Nobuyuki Takahashi, Masahiro Sawa, Hiroyuki Nakahara
  • Publication number: 20080054788
    Abstract: In a display panel having electrode wires connected to drive units, the electrode wires form N number of electrode wire groups, each of which is composed of M number of successive adjacent electrode wires, and the display panel has first and second connecting terminal groups, arranged along first and second sides of the panel respectively and each having M terminals. K number of electrode wire groups out of the N number of electrode wire groups (K<N) are connected via leading lines to the first connecting terminal groups respectively, N?K number of electrode wire groups out of the N number of electrode wire groups are connected via the leading lines to the second connecting terminal groups respectively, and the K number of electrode wire groups and the N?K number of electrode wire groups are arranged alternately or in alternate sets of a plurality of groups.
    Type: Application
    Filed: September 5, 2007
    Publication date: March 6, 2008
    Inventors: Nobuhiro Iwase, Yasuhiko Kunii, Koji Ohira, Yoshikazu Kanazawa, Taizo Ohno
  • Publication number: 20070285348
    Abstract: A plasma display panel is provided in which discharge connection in the column direction is prevented without increasing the number of man-hours in a formation process of a partition and without deteriorating ventilation for an exhaust process. A pattern in a plan view of a partition is made a mesh pattern in which vertical patterns are included at inter-row positions in each column. Each of first vertical walls is positioned at a boundary between columns, each of second vertical walls is arranged at a position away from a boundary between columns for each boundary between rows and each of horizontal walls is positioned at a boundary between rows. In the partition, a height of portions where the first vertical wall crosses the horizontal wall and a height of portions where the second vertical wall crosses the horizontal wall are smaller than a height of the other portions of the partition.
    Type: Application
    Filed: May 8, 2007
    Publication date: December 13, 2007
    Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITED
    Inventors: Masahiro Sawa, Yoshimi Kawanami, Koji Ohira, Nobuyuki Takahashi
  • Patent number: 7233107
    Abstract: A plasma display panel is provided in which discharge connection in the column direction is prevented without increasing the number of man-hours in a formation process of a partition and without deteriorating ventilation for an exhaust process. A pattern in a plan view of a partition is made a mesh pattern in which vertical patterns are included at inter-row positions in each column. Each of first vertical walls is positioned at a boundary between columns, each of second vertical walls is arranged at a position away from a boundary between columns for each boundary between rows and each of horizontal walls is positioned at a boundary between rows. In the partition, a height of portions where the first vertical wall crosses the horizontal wall and a height of portions where the second vertical wall crosses the horizontal wall are smaller than a height of the other portions of the partition.
    Type: Grant
    Filed: May 5, 2004
    Date of Patent: June 19, 2007
    Assignee: Fujitsu Hitachi Plasma Display Limited
    Inventors: Masahiro Sawa, Yoshimi Kawanami, Koji Ohira, Nobuyuki Takahashi
  • Publication number: 20070103074
    Abstract: A plasma display panel includes first and second substrates opposed to each other for defining a space filled with discharge gas, a screen made up of cells arranged in the row and column directions, display electrodes arranged on the first substrate, the display electrodes extending in the row direction, band-like partitions arranged in parallel on the second substrate for dividing the gas filled space into columns, and fluorescent material layers sticking to side faces of the partitions and inner surfaces between the partitions on the columns, each of the fluorescent material layers extending across cells. The thickness of the fluorescent material layer at a part sticking to the side face of the partition and overlapping with the display electrodes is designed to be smaller than the thickness at a part sticking to the side face of the partition in the vicinity of the surface discharge gap.
    Type: Application
    Filed: November 6, 2006
    Publication date: May 10, 2007
    Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITED
    Inventors: Noriaki Setoguchi, Koji Ohira
  • Publication number: 20070096651
    Abstract: A plasma display panel is provided which achieves the reduction in discharge current and the improvement in luminance. The plasma display panel includes a pair of substrates opposite to each other, a discharge gas sealed between the substrates, and a plurality of first display electrodes and a plurality of second display electrodes disposed on one of the substrates to generate surface discharge. Each of the first and second display electrodes has a shape including an elongated strip portion extending over plural cells and a plurality of projections protruding from the strip portion in each of the cells. The projection of the first display electrode and the projection of the second display electrode define a surface discharge gap in each of the cells, and each of the projections of the first and second display electrodes is formed to have a serpentine strip shape having at least two bending portions.
    Type: Application
    Filed: October 23, 2006
    Publication date: May 3, 2007
    Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITED
    Inventors: Noriaki Setoguchi, Koji Ohira
  • 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
  • Publication number: 20060181212
    Abstract: A plasma display panel includes a pair of substrates, pairs of discharge electrodes, row electrodes, column electrodes, and barrier ribs. The pair of substrates have R cells, G cells and B cells which respectively generate three primary colors of red, green and blue in the discharge space to form each of pixels. The pairs of discharge electrodes are placed on one of the substrates for each of the R cell, G cell and B cell. The row electrodes, which are placed on each row of the matrix, are to supply power to each of the discharge electrodes. The column electrodes are placed on each column of the matrix on the other substrate. The barrier ribs are placed between the column electrodes in the column direction. The length in the row direction of the discharge electrodes is adjusted in accordance with the discharge timing of each cell for each of R cells, G cells and B cells.
    Type: Application
    Filed: February 3, 2006
    Publication date: August 17, 2006
    Applicant: Fujitsu Hitachi Plasma Display Limited
    Inventors: Masahiro Sawa, Koji Ohira
  • 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
  • Publication number: 20050001548
    Abstract: A plasma display panel is provided in which discharge connection in the column direction is prevented without increasing the number of man-hours in a formation process of a partition and without deteriorating ventilation for an exhaust process. A pattern in a plan view of a partition is made a mesh pattern in which vertical patterns are included at inter-row positions in each column. Each of first vertical walls is positioned at a boundary between columns, each of second vertical walls is arranged at a position away from a boundary between columns for each boundary between rows and each of horizontal walls is positioned at a boundary between rows. In the partition, a height of portions where the first vertical wall crosses the horizontal wall and a height of portions where the second vertical wall crosses the horizontal wall are smaller than a height of the other portions of the partition.
    Type: Application
    Filed: May 5, 2004
    Publication date: January 6, 2005
    Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITED
    Inventors: Masahiro Sawa, Yoshimi Kawanami, Koji Ohira, Nobuyuki Takahashi
  • Publication number: 20040263435
    Abstract: A plasma display device is provided that can realize a stable progressive display using a plasma display panel that has a shared type arrangement form of display electrodes. A plasma display panel structure including display electrodes having a shape that has little variation of electrode area between cells and a driving sequence are combined in which the addressing step is divided into the first half and the second half. One of the first half addressing and the second half addressing is performed for a row on which the first display electrode is arranged that has an odd arrangement order when noting only the first display electrodes that are not used for row selection, and the other of the first half addressing and the second half addressing is performed for a row on which the first display electrode is arranged that has an even arrangement order.
    Type: Application
    Filed: June 28, 2004
    Publication date: December 30, 2004
    Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITED
    Inventors: Koji Ohira, Yoshimi Kawanami, Nobuyuki Takahashi, Masahiro Sawa, Hiroyuki Nakahara
  • 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: 20040125050
    Abstract: A method for driving a plasma display panel is provided in which abrupt variation in brightness of additional images is eliminated; thereby ensuring that quality of display is enhanced, the additional images being displayed adjacently to a picture for aspect ratio conversion. The method includes the step of replacing one frame with first sub-frames for lighting only an area other than a part of a screen and a second sub-frame for lighting only a section of the screen other than the area when the area is used to display a picture having an aspect ratio different from that of the screen, and controlling luminance in the first sub-frames and luminance in the second sub-frame independently of each other.
    Type: Application
    Filed: August 28, 2003
    Publication date: July 1, 2004
    Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITED
    Inventors: Koji Ohira, Souichirou Hidaka