Patents by Inventor Yoshihisa Tsuruoka

Yoshihisa Tsuruoka 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: 7622199
    Abstract: A thin-profile organic EL device with a high degree of reliability is provided. The anode, the organic layer and the light transmissible-type cathode are laminated on the substrate and the inorganic water-barrier layer are laminated thereon, and then a UV rays-curable type water-capturing agent comprising a UV rays-curing agent and a water-absorbing agent is cured to bond to the sealing substrate instead of an adhesive layer. The UV rays-curing agent comprises an acrylic monomer, initiator and accelerator. The UV rays-curable type sealing agent is placed to the outer peripheral portion of the UV rays-curable type water-capturing agent to be cured. The emission of the organic layer is transmitted upward via the cathode, UV rays-curable type water-capturing agent and the sealing substrate.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: November 24, 2009
    Assignee: Futaba Corporation
    Inventors: Satoshi Tanaka, Shigeru Hieda, Hisamitsu Takahashi, Yoshihisa Tsuruoka
  • Patent number: 7030258
    Abstract: A water-capturing agent capable of inhibiting the generation and growth of a darkspot and an organic EL device including the water-capturing agent are provided. The organic EL device uses the water-capturing agent comprising a compound illustrated by the chemical structural formula (1); wherein R and R? are independently a substituent selected from the group consisting of an alkyl group, aryl group, cycloalkyl group, alkoxy group, acyl group and heterocyclic group having an unsaturated bond and one or more of a hydrogen atom and a carbon atom, or a substituent formed by substituting at least one of a hydrogen atom of said group with a halogen atom, and a central atom M is a metal having coordination number of six.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: April 18, 2006
    Assignee: Futaba Corporation
    Inventors: Hisamitsu Takahashi, Shigeru Hieda, Yoshihisa Tsuruoka, Satoshi Tanaka
  • Publication number: 20050227114
    Abstract: A thin-profile organic EL device with a high degree of reliability is provided. The anode, the organic layer and the light transmissible-type cathode are laminated on the substrate and the inorganic water-barrier layer are laminated thereon, and then a UV rays-curable type water-capturing agent comprising a UV rays-curing agent and a water-absorbing agent is cured to bond to the sealing substrate instead of an adhesive layer. The UV rays-curing agent comprises an acrylic monomer, initiator and accelerator. The UV rays-curable type sealing agent is placed to the outer peripheral portion of the UV rays-curable type water-capturing agent to be cured. The emission of the organic layer is transmitted upward via the cathode, UV rays-curable type water-capturing agent and the sealing substrate.
    Type: Application
    Filed: April 7, 2005
    Publication date: October 13, 2005
    Inventors: Satoshi Tanaka, Shigeru Hieda, Hisamitsu Takahashi, Yoshihisa Tsuruoka
  • Patent number: 6896980
    Abstract: A novel water-scavenging agent of the present invention comprising a compound of formula (I) as a primary component can be dissolved in a polar solvent and coated by a screen printing method, and the inventive organic EL device comprising same can maintain stable luminescent characteristics for a prolonged time: wherein, R1, R2, R3, R4, R5 and R6 are each independently hydrogen; halogen; alkyl, aryl, cycloalkyl or hetero-ring, optionally substituted with at least one halogen atom, and M is a metal having a coordination number of 6.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: May 24, 2005
    Assignee: Futaba Corporation
    Inventors: Hisamitsu Takahashi, Shigeru Hieda, Yoshihisa Tsuruoka, Satoshi Tanaka
  • Patent number: 6887592
    Abstract: An organic EL device having a drying medium capable of suppressing the growth of a dark spot equipped with a water-capturing medium layer for chemically capturing water placed on a water-capturing medium holding layer. The organic EL device is comprised of a sealed container having a glass substrate and a sealing cap bonded to the glass substrate. The sealed container is provided with a light emitting region formed on the substrate which is formed of organic EL material layers placed between a pair of opposite anode and cathode electrodes. The sealed container further includes a water-capturing medium holding layer provided on an inner surface of the container spaced apart from the light emitting region and a water-capturing medium holding layer.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: May 3, 2005
    Assignee: Futaba Corporation
    Inventors: Shigeru Hieda, Yoshihisa Tsuruoka, Hisamitsu Takahashi, Satoshi Tanaka
  • Publication number: 20040256592
    Abstract: A water-capturing agent capable of inhibiting the generation and growth of a darkspot and an organic EL device including the water-capturing agent are provided.
    Type: Application
    Filed: June 15, 2004
    Publication date: December 23, 2004
    Inventors: Hisamitsu Takahashi, Shigeru Hieda, Yoshihisa Tsuruoka, Satoshi Tanaka
  • Patent number: 6790381
    Abstract: An organic EL device is disclosed in which is placed a transparent water-capturing film comprising an easy-to-use organometallic compound illustrated by the chemical formula (1): wherein, R1, R2 and R3 are selected from the group consisting of alkyl group, aryl group, cycloalkyl group, heterocyclic group and acyl group having one carbon atom and above, and M is a trivalent metallic atom.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: September 14, 2004
    Assignee: Futaba Corporation
    Inventors: Yoshihisa Tsuruoka, Hisamitsu Takahashi, Satoshi Tanaka, Shigeru Hieda
  • Publication number: 20040056232
    Abstract: A novel water-scavenging agent of the present invention comprising a compound of formula (I) as a primary component can be dissolved in a polar solvent and coated by a screen printing method, and the inventive organic EL device comprising same can maintain stable luminescent characteristics for a prolonged time: 1
    Type: Application
    Filed: September 11, 2003
    Publication date: March 25, 2004
    Applicant: Futaba Corporation
    Inventors: Hisamitsu Takahashi, Shigeru Hieda, Yoshihisa Tsuruoka, Satoshi Tanaka
  • Publication number: 20030170496
    Abstract: An organic EL device having a drying medium capable of suppressing the growth of a dark spot equipped with a water-capturing medium layer for chemically capturing water placed on a water-capturing medium holding layer. The organic EL device is comprised of a sealed container having a glass substrate and a sealing cap bonded to the glass substrate. The sealed container is provided with a light emitting region formed on the substrate which is formed of organic EL material layers placed between a pair of opposite anode and cathode electrodes. The sealed container further includes a water-capturing medium holding layer provided on an inner surface of the container spaced apart from the light emitting region and a water-capturing medium holding layer.
    Type: Application
    Filed: March 7, 2003
    Publication date: September 11, 2003
    Applicant: Futaba Corporation
    Inventors: Shigeru Hieda, Yoshihisa Tsuruoka, Hisamitsu Takahashi, Satoshi Tanaka
  • Publication number: 20030110981
    Abstract: An organic EL device is disclosed in which is placed a transparent water-capturing film comprising an easy-to-use organometallic compound illustrated by the chemical formula (1): 1
    Type: Application
    Filed: November 5, 2002
    Publication date: June 19, 2003
    Inventors: Yoshihisa Tsuruoka, Hisamitsu Takahashi, Satoshi Tanaka, Shigeru Hieda
  • Patent number: 6414443
    Abstract: In an organic electroluminescence (EL) device including a display section having one or more light emitting units and a monitoring section positioned outside the display section and having one or more monitoring cells, each of the light emitting units and the monitoring cells has a cathode, an anode and at least one organic EL layer positioned between the cathode and the anode. In the organic EL device, either cathodes or anodes of the light emitting units and the monitoring cells is transparent and a current passing through an anode and a cathode of a monitoring cell is monitored to control the light emitting units.
    Type: Grant
    Filed: February 6, 2001
    Date of Patent: July 2, 2002
    Assignee: Futaba Denshi Kogyo Kabushiki Kaisha
    Inventors: Yoshihisa Tsuruoka, Yoshihisa Marushima
  • Patent number: 6410166
    Abstract: An organic electroluminescence (EL) device doping material which is thermally stable, having a high melting point, and doping with which improves stability of a luminous layer formed as a thin layer. An organic EL device 1 comprises a glass substrate 3, an anode 2 made of transparent indium tin oxide (ITO), an electron hole implanted transporting layer 4 of TPD, a luminous layer 5, and a cathode 6 made of Mg. The luminous layer is made of Alq3 doped with 1 mol % of Al2O (SABF)2 as a metal chelate complex having ligands composed of SABF skeletons. When plus DC voltage is applied to the anode 2 and minus DC voltage, to the cathode 6, the luminous layer 5 emits yellow electroluminescence of 16400 cd/m2 at maximum with 15 V. The external quantum yield was 0.1891 m/W. The luminous layer of the organic EL device is thermally stable and hard to be deteriorated.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: June 25, 2002
    Assignee: Futaba Corporation
    Inventors: Hisamitsu Takahashi, Yoshihisa Tsuruoka, Satoshi Tanaka, Toshio Miyauchi
  • Patent number: 6288486
    Abstract: A multi-color organic EL device capable of preventing color mixing due to leakage luminescence while incorporating therein luminous layers formed by mask deposition techniques. Anodes, a hole transport layer, luminous layers different in type from each other and cathodes are laminated. In such a laminate structure, the luminous layers different in type which are arranged adjacently to each other are constructed so as to permit the luminous layer increased in band gap to get between the luminous layer decreased in band gap and the hole transport layer.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: September 11, 2001
    Assignee: Utaba Denshi Kogyo Kabushiki Kaisha
    Inventors: Yoshihisa Tsuruoka, Hisamitsu Takahashi, Satoshi Tanaka, Toshio Miyauchi, Tatsuo Fukuda
  • Publication number: 20010013758
    Abstract: In an organic electroluminescence (EL) device including a display section having one or more light emitting units and a monitoring section positioned outside the display section and having one or more monitoring cells, each of the light emitting units and the monitoring cells has a cathode, an anode and at least one organic EL layer positioned between the cathode and the anode. In the organic EL device, either cathodes or anodes of the light emitting units and the monitoring cells is transparent and a current passing through an anode and a cathode of a monitoring cell is monitored to control the light emitting units.
    Type: Application
    Filed: February 6, 2001
    Publication date: August 16, 2001
    Applicant: Futaba Denshi Kogyo Kabushiki Kaisha
    Inventors: Yoshihisa Tsuruoka, Yoshihisa Marushima
  • Patent number: 6048631
    Abstract: An object of this invention is to provide an organic EL device material stable against heat, having a high purity in bluish light emission and a high efficiency. The organic EL device comprises a glass substrate, a transparent anode, a TPD which is an electron hole implanted transporting layer, an organic luminous layer, Alq.sub.3 which is an electron implanted transporting layer and a cathode. The organic luminous layer is an aluminum complex which is .mu.-oxozi [bis(2-(2-benzo oxazolyl)-phenolate) aluminum (III)]. Plus and minus DC voltages are applied to the anode and cathode respectively. The organic luminous layer indicates bluish light emission of 1314 cd/m.sup.2 at 16V. A peak wave length of the luminous spectrum is 420 nm and chromaticity coordinates are x=0.185 and y=0.178 and a high purity as bluish color is assured. The organic EL device material is stable against heat and difficult to deteriorate.
    Type: Grant
    Filed: July 11, 1997
    Date of Patent: April 11, 2000
    Assignee: Futaba Denshi Kogyo K.K.
    Inventors: Hisamitsu Takahashi, Yoshihisa Tsuruoka, Satoshi Tanaka, Toshio Miyauchi
  • Patent number: 5998926
    Abstract: A fixed pattern display device of the dynamic drive type with high definition including cathodes formed into a fine pattern by conventional photolithography. The cathodes are made of a metal material having a low resistance and arranged on an insulating substrate in the form of wiring patterns for fixed display segments of each of display patterns together with the display patterns. ITO which is resistant to water is exposed in the form of anodes each acting as a common electrode, resulting in arrangement of any protective film being eliminated.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: December 7, 1999
    Assignee: Futaba Denshi Kogyo K.K.
    Inventors: Yoshihisa Tsuruoka, Hisamitsu Takahashi, Toshio Miyauchi
  • Patent number: 5898276
    Abstract: The voltage to be applied to fixed display segments are made to be substantially the same to prevent irregular luminance distribution so as to improve display quality. In consideration of allowable voltage drop occurring attributable to the levels of electric currents which flow in electric lines of fixed display segments, the same voltage is applied to the fixed display segments by determining the resistance values by changing the pattern shapes (the lengths, the widths, the thicknesses and the line) of electric lines of the fixed display segments. If the fixed display segments have the same display area, the widths of the electric lines of the fixed display segments are determined to correspond to the ratios of lengths of electric lines of the fixed display segments in order to cause the fixed display segments to be applied with the same voltage.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: April 27, 1999
    Assignee: Futaba Denshi Kogyo K.K.
    Inventors: Yoshihisa Tsuruoka, Hisamitsu Takahashi, Satoshi Tanaka, Toshio Miyauchi
  • Patent number: 5804917
    Abstract: An organic electroluminescent display device capable of permitting upper electrodes of a fine pattern to be formed and exhibiting increased durability. Ribs are spaced at predetermined intervals on transparent electrodes arranged in the form of a film on a lower transparent substrate. An organic layer is formed between each adjacent two of the ribs and an upper electrode is deposited all over the transparent electrodes. A portion of the upper electrode formed on each of the ribs is removed by scraping, rubbing or the like, resulting in the upper electrode being formed on only each of the organic layers. A cap layer may be provided on the upper electrode as required.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: September 8, 1998
    Assignee: Futaba Denshi Kogyo K.K.
    Inventors: Hisamitsu Takahashi, Yoshihisa Tsuruoka, Toshio Miyauchi, Shigeru Hieda
  • Patent number: 5606462
    Abstract: A color filter capable of being uniformly formed without any deformation of a light-permeable anode conductor and prevented from being adversely affected by etching for formation of the anode conductor. A light-permeable anode substrate free of any deformation is uniformly formed thereon with anode conductors, on which color filters are formed of a mixture of a composite oxide pigment and a conductive material so as to cover the anode conductors. The color filters each are formed by arranging a color filter material in a predetermined pattern, followed by calcination. Then, phosphor layers are deposited on the color filters. The phosphor layers are electrically connected through the conductive material of the color filters to the anode conductors. A thickness of the color filters and a particle diameter of the conductive material are determined to be substantially the same, so that the color filters exhibit conductivity only in a direction of thickness.
    Type: Grant
    Filed: July 12, 1994
    Date of Patent: February 25, 1997
    Assignee: Futaba Denshi Kogyo K.K.
    Inventors: Yoshihisa Tsuruoka, Haruhisa Hirakawa, Yoshinari Okamoto, Eiji Sato
  • Patent number: 5559397
    Abstract: A color filter capable of being uniformly formed without any deformation of a light-permeable anode conductor and prevented from being adversely affected by etching for formation of the anode conductor. A light-permeable anode substrate free of any deformation is uniformly formed thereon with anode conductors, on which color filters are formed of a mixture of a composite oxide pigment and a conductive material so as to cover the anode conductors. The color filters each are formed by arranging a color filter material in a predetermined pattern, followed by calcination. Then, phosphor layers are deposited on the color filters. The phosphor layers are electrically connected through the conductive material of the color filters to the anode conductors. A thickness of the color filters and a particle diameter of the conductive material are determined to be substantially the same, so that the color filters exhibit conductivity only in a direction of thickness.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: September 24, 1996
    Assignee: Futaba Denshi Kogyo K.K.
    Inventors: Yoshihisa Tsuruoka, Haruhisa Hirakawa, Yoshinari Okamoto, Eiji Sato