Patents by Inventor Takao Takiguchi

Takao Takiguchi 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).

  • Conductive liquid crystal device and organic electroluminescence device
    Patent number: 6870583
    Abstract: A conductive liquid crystal device capable of exhibiting luminescence of different luminances at an identical drive voltage, thus useful as an EL device having a memory chacteristic, is provided. The conductive liquid crystal device is formed by a pair of oppositely disposed electrodes and a liquid crystalline organic layer disposed between the electrodes, wherein the liquid crystalline organic layer has plural regions having different electroconductivities.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: March 22, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Takashi Moriyama
  • Organic electroluminescence device
    Publication number: 20050052125
    Abstract: A luminescence device is constituted by a substrate, a first electrode disposed on the substrate, at least one organic luminescence function layer disposed on the first electrode, a second electrode disposed on the above at least one organic luminescence function layer, and an oxygen absorbent disposed between the substrate and the second electrode or between the first and second electrodes. To the luminescence device, a voltage is applied between the first and second electrodes to cause phosphorescence from at last one layer constituting the above-mentioned at least one organic luminescence function layer preferably containing the oxygen absorbent. The oxygen absorbent may be formed in a layer disposed at a region other than pixel portions.
    Type: Application
    Filed: October 15, 2004
    Publication date: March 10, 2005
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takashi Moriyama, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Koji Noguchi, Jun Kamatani, Manabu Furugori
  • Light emitting device having dopant in a light emitting layer, and method of producing the light emitting device
    Publication number: 20050035707
    Abstract: A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and a dopant for improving the dispersibility thereof. As the dopant, there are employed a light emitting compound and a non-light emitting compound or a current enhancing material. In case of employing the light emitting compound, the composition corresponds to a case of utilizing plural light emitting materials, and, in such case, the light emission wavelengths are preferably mutually closer. Also, evaporation of the light emitting material and the dopant in the same evaporation boat makes it possible to reduce evaporation temperature, thereby improving the dispersability of the light emitting material.
    Type: Application
    Filed: September 20, 2004
    Publication date: February 17, 2005
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Manabu Furugori, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Jun Kamatani, Hironobu Iwawaki
  • Organic light emitting device
    Publication number: 20050037236
    Abstract: An organic light emitting device having a high light emitting efficiency and a long light emission lifetime is provided that comprises a pair of electrodes provided on a substrate, and a light emitting layer comprising at least one layer of an organic substance provided between the electrodes, wherein the light emitting layer comprises a first organic substance and a second organic substance mainly concerning a light emission wavelength of the light emitting layer, and wherein the first organic substance comprises a fluorine-containing organic compound.
    Type: Application
    Filed: September 23, 2004
    Publication date: February 17, 2005
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jun Kamatani, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Manabu Furugori, Hironobu Iwawaki
  • Organic electroluminescent device and display apparatus
    Publication number: 20050023971
    Abstract: The present invention realizes measures for antireflection in various ways in an organic electroluminescent device, and provides a high performance organic electroluminescent device. The organic electroluminescent device includes an organic compound layer containing luminescent sections, the organic compound layer being placed between substantially transparent electrodes; and an insulating light absorption layer in contact with first electrodes, the light absorption layer being placed between the substrate and the first electrodes.
    Type: Application
    Filed: August 24, 2004
    Publication date: February 3, 2005
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Manabu Furugori, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Jun Kamatani
  • Luminescence device, display apparatus and metal coordination compound
    Publication number: 20050025996
    Abstract: A luminescence device that has an organic compound layer disposed between a pair of electrodes. This organic compound layer contains a metal coordination compound represented by the following formula (1): wherein M is Ir, Rh or Pd; n is 2 or 3; CyN is a substituted or unsubstituted cyclic group containing a nitrogen atom connected to M and capable of containing another nitrogen atom and/or a sulfur atom; and CyC is a substituted or unsubstituted cyclic group containing a carbon atom connected to M and capable of containing a nitrogen atom and/or a sulfur atom.
    Type: Application
    Filed: August 20, 2004
    Publication date: February 3, 2005
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akira Tsuboyama, Hidemasa Mizutani, Shinjiro Okada, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Jun Kamatani, Manabu Furugori
  • Metal coordination compound, luminescence device and display apparatus
    Publication number: 20050027123
    Abstract: An electroluminescence device having a layer containing a specific metal coordination compound is provided. The metal coordination compound is represented by formula (1) below: MLmL?n??(1), wherein M is a metal atom of Ir, Pt, Rh or Pd; L and L? are mutually different bidentate ligands; m is 1, 2 or 3 and n is 0, 1 or 2 with the proviso that m+n is 2 or 3; a partial structure MLm is represented by formula (2) shown below and a partial structure ML?n is represented by formula (3) or (4) shown below: at least one of the optional substituent(s) of the cyclic groups, and the cyclic groups CyCl and CyC2 includes a benzofuran structure capable of having a substituent represented by the following formula (5): The metal coordination compound having the benzofuran structure is effective in providing high-efficiency luminescence and long-term high luminance.
    Type: Application
    Filed: August 25, 2004
    Publication date: February 3, 2005
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takao Takiguchi, Shinjiro Okada, Akira Tsuboyama, Seishi Miura, Takashi Moriyama, Jun Kamatani, Manabu Furugori
  • Light-emitting material and light-emitting device
    Publication number: 20050014024
    Abstract: There is provided a light-emitting material comprising a metal coordination compound having a partial structure represented by the following general formula (1). The light-emitting material has high luminous efficiency and high stability and can be produced at a low cost.
    Type: Application
    Filed: July 9, 2004
    Publication date: January 20, 2005
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akira Tsuboyama, Shinjiro Okada, Takao Takiguchi, Satoshi Igawa, Jun Kamatani, Manabu Furugori
  • Luminescence device, display apparatus and metal coordination compound
    Publication number: 20050014025
    Abstract: A luminescence device comprising a pair of electrodes and an organic compound layer disposed between the electrodes. The layer contains a metal coordination compound represented by the following formula (1): wherein M is Ir, Rh or Pd; n is 2 or 3; and X1 to X8 is, independently, a hydrogen atom or a substituent selected from the group consisting of a halogen atom; a nitro group; a trifluoromethyl group; a trialkylsilyl group having three linear or branched alkyl groups each independently having 1-8 carbon atoms; and a linear or branched alkyl group having 2-20 carbon atoms capable of including one or at least two non-neighboring methylene groups which can be replaced with —O—, —S—, —C(O)—, —C(O)—O—, —O—C(O)—, —CH?CH— or —C?C— and capable of including hydrogen atom which can be replaced with fluorine atom.
    Type: Application
    Filed: August 6, 2004
    Publication date: January 20, 2005
    Applicant: Canon Kabushiki Kaisha
    Inventors: Takao Takiguchi, Hidemasa Mizutani, Shinjiro Okada, Akira Tsuboyama, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Jun Kamatani, Manabu Furugori
  • Light emitting device having a dopant in a light emitting layer and method of producing the light emitting device
    Patent number: 6838818
    Abstract: A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and a dopant for improving the dispersibility thereof. As the dopant, there are employed a light emitting compound and a non-light emitting compound or a current enhancing material. In case of employing the light emitting compound, the composition corresponds to a case of utilizing plural light emitting materials, and, in such case, the light emission wavelengths are preferably mutually closer. Also, evaporation of the light emitting material and the dopant in the same evaporation boat makes it possible to reduce evaporation temperature, thereby improving the dispersability of the light emitting material.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: January 4, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Manabu Furugori, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Jun Kamatani, Hironobu Iwawaki
  • Light emitting device and display unit which make use of porphyrin derivative compound
    Patent number: 6835471
    Abstract: A light emitting device is disclosed having a light emitting layer containing a porphyrin derivative compound each pyrrole group of which is characterized by having a straight-chain or branched side-chain alkyl group having 5 to 20 carbon atoms, and the central metal of which is Cr, Ni, Cu, Co, Ru, Rh, Pd, Ir, Pt or Au. The compound is light-emissive and especially has phosphorescent light emission properties and liquid crystal properties. Also disclosed is a display unit using the light emitting device.
    Type: Grant
    Filed: March 12, 2002
    Date of Patent: December 28, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Tsuboyama, Shinjiro Okada, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Jun Kamatani, Manabu Furugori
  • Organic electroluminescent device and display apparatus
    Patent number: 6836068
    Abstract: An organic electroluminescent device includes an organic compound layer containing luminescent sections placed between substantially transparent electrodes. An insulating light absorption layer is in contact with first electrodes, and the light absorption layer is placed between a substrate and the first electrodes.
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: December 28, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Manabu Furugori, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Jun Kamatani
  • Metal coordination compound and electroluminescence device
    Patent number: 6824894
    Abstract: A metal coordination compound having a basic structure represented by formula: MLmL′n (1), wherein M is a metal atom of Ir, Pt, Rh or Pd; L and L′ are mutually different bidentate ligands; m is 1, 2 or 3; wherein at least one bidentate ligand has a partial structure formed by condensation via an alkylene group having 2-10 carbon atoms, is provided. In an electroluminescence device composed of one or a plurality of organic films disposed between a cathode and an anode, at least one layer is a luminescence layer which is formed by incorporating luminescence molecules constituting the metal coordination compound having a structure of the formula (1) described above as a guest material in a host material thereby to provide an electroluminescence device producing luminescence at high efficiency and stably keeping a high luminance for a long period.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: November 30, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takao Takiguchi, Akira Tsuboyama, Shinjiro Okada, Jun Kamatani, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Manabu Furugori, Hidemasa Mizutani
  • Luminescence device, display apparatus and metal coordination compound
    Patent number: 6821646
    Abstract: A luminescence device that has an organic compound layer disposed between a pair of electrodes. This organic compound layer contains a metal coordination compound represented by the following formula (1) wherein M is Ir, Rh or Pd; n is 2 or 3; CyN is a substituted or unsubstituted cyclic group containing a nitrogen atom connected to M and capable of containing another nitrogen atom and/or sulfur atom; and CyC is a substituted or unsubstituted cyclic group containing a carbon atom connected to M and capable of containing a nitrogen atom and/or a sulfur atom.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: November 23, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Tsuboyama, Hidemasa Mizutani, Shinjiro Okada, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Jun Kamatani, Manabu Furugori
  • Luminescence device, display apparatus and metal coordination compound
    Patent number: 6815091
    Abstract: A luminescence device comprising a pair of electrodes and an organic compound layer disposed therebetween. The layer contains a metal coordination compound represented by the following formula (1): wherein M is Ir, Rh or Pd; n is 2 or 3; and X1 to X8 is, independently, a hydrogen atom or a substituent selected from the group consisting of a halogen atom; a nitro group; a trifluoromethyl group; a trialkylsilyl group having three linear or branched alkyl groups each independently having 1-8 carbon atoms; and a linear or branched alkyl group having 2-20 carbon atoms capable of including one or at least two non-neighboring methylene groups which can be replaced with —O—, —S—, —C(O)—, —C(O)—O—, —O—C(O)—, —CH═CH— or —C≡C— and capable of including hydrogen atom which can be replaced with fluorine atom.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: November 9, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takao Takiguchi, Hidemasa Mizutani, Shinjiro Okada, Akira Tsuboyama, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Jun Kamatani, Manabu Furugori
  • Organic light emitting device
    Patent number: 6812497
    Abstract: An organic light emitting device having a high light emitting efficiency and a long light emission lifetime is provided that comprises a pair of electrodes provided on a substrate, and a light emitting layer comprising at least one layer of an organic substance provided between the electrodes, wherein the light emitting layer comprises a first organic substance and a second organic substance mainly concerning a light emission wavelength of the light emitting layer, and wherein the first organic substance comprises a fluorine-containing organic compound.
    Type: Grant
    Filed: April 29, 2003
    Date of Patent: November 2, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Manabu Furugori, Hironobu Iwawaki
  • Metal coordination compound, luminescence device and display apparatus
    Patent number: 6797980
    Abstract: A metal coordination compound suitable as an organic material for a luminescent device is represented by the following formula (1):
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: September 28, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takao Takiguchi, Shinjiro Okada, Akira Tsuboyama, Koji Noguchi, Takashi Moriyama, Jun Kamatani, Manabu Furugori
  • Electro-conductive liquid crystal element and organic electro-luminescence element
    Patent number: 6788361
    Abstract: A polymer type organic EL element is improved in terms of the stability and the efficiency and intensity of light emission. A carrier injection layer made of discotic liquid crystal or smectic liquid crystal having an electron resonance structure is interposed between a polymer layer and an electrode.
    Type: Grant
    Filed: May 14, 2002
    Date of Patent: September 7, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Takashi Moriyama
  • Organic light-emitting element and display device
    Publication number: 20040169461
    Abstract: There is provided an organic light-emitting element comprising at least one light-emitting layer between a pair of electrodes formed on a substrate and at least two or more light emission center materials included in the light-emitting layer, and that the at least one or more light emission center materials include a phosphorescent light-emitting material, and an excitation lifetime of the light emission center material that emits light having a shortest wavelength is shorter than an excitation lifetime of the other light emission center material, whereby a high-efficiency organic light-emitting element without decreasing a color purity of white light emission can be obtained.
    Type: Application
    Filed: November 10, 2003
    Publication date: September 2, 2004
    Inventors: Takashi Moriyama, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Seishi Miura, Satoshi Igawa, Jun Kamatani, Hironobu Iwawaki
  • Metal coordination compound and organic luminescence device
    Patent number: 6783873
    Abstract: A metal coordination compound having a binuclear molecular structure represented by the following formula (1): wherein M1 and M2 independently denotes a metal atom selected from the group consisting of Ir, Pt, Rh, Pd, Ru and Os; P is a quadridentate ligand connected to M1 and M1; Q1 is a bidentate ligand connected to M1; Q2 is a bidentate ligand connected to M2; and n is 1 or 2.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: August 31, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Tsuboyama, Hidemasa Mizutani, Shinjiro Okada, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Jun Kamatani, Manabu Furugori