Patents by Inventor Chika Negishi

Chika Negishi 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: 7709832
    Abstract: A fluoranthene compound has 6 fused rings. An organic light-emitting element uses the fluoranthene compound.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: May 4, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Chika Negishi, Takao Takiguchi, Satoshi Igawa, Jun Kamatani, Naoki Yamada
  • Patent number: 7691491
    Abstract: Novel monoaminofluorene compounds are provided, and organic light-emitting devices which exhibit good luminescence hue of extremely high purity and have optical output with high luminescence efficiency, high luminance and longer operating life are provided using the compounds.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: April 6, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihito Saitoh, Mizuho Hiraoka, Koichi Suzuki, Akihiro Senoo, Hiroshi Tanabe, Naoki Yamada, Chika Negishi
  • Publication number: 20100033081
    Abstract: To provide a compound excellent in light emitting properties and an organic light emitting device having the compound.
    Type: Application
    Filed: December 15, 2006
    Publication date: February 11, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Naoki Yamada, Chika Negishi, Keiji Okinaka, Minako Nakasu
  • Publication number: 20100026171
    Abstract: Provided are a condensed ring aromatic compound for an organic light-emitting device, and an organic light-emitting device having optical output with high efficiency and high luminescence and having durability. An organic light-emitting device including an anode and a cathode, and a layer made of an organic compound interposed between the anode and the cathode, wherein at least one layer of the layers made of the organic compound contains a condensed ring aromatic compound shown in the following general formula [1]: wherein R1 to R16 each independently represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group, and may be the same or different.
    Type: Application
    Filed: March 27, 2008
    Publication date: February 4, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Chika Negishi, Akihito Saitoh, Hiroki Ohrui, Hironobu Iwawaki, Masanori Muratsubaki
  • Patent number: 7632577
    Abstract: To provide an organic light-emitting device that exhibits the hue of light emission having extremely high purity and has a light output having high luminance and long life with a high degree of efficiency. The organic light-emitting device comprises at least a pair of electrodes consisting of an anode and a cathode and one or more organic compound-containing layers sandwiched between the pair of electrodes, wherein at least one of the above described organic compound-containing layers contains at least one compound selected from the group consisting of the compounds represented by the following general formula [1] and at least one compound selected from the group consisting of the compounds represented by the following general formula [2].
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: December 15, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihito Saitoh, Mizuho Hiraoka, Koichi Suzuki, Akihiro Senoo, Hiroshi Tanabe, Naoki Yamada, Chika Negishi
  • Publication number: 20090278118
    Abstract: There are provided a novel benzofluoranthene compound and an organic light-emitting device which uses the benzofluoranthene compound, gives a blue emission hue with extremely good purity, and has an optical output with a high efficiency, a high luminance, and a long life. Specifically, there are provided a benzofluoranthene compound represented by the general formula shown below and an organic light-emitting device including a pair of electrodes including an anode and a cathode one of which is a transparent or translucent electrode material, and an organic compound layer disposed between the pair of electrodes and including a material for an organic light-emitting device containing the benzofluoranthene compound. In the general formula (1), one of X1, X2, X3, X4, X5, and X6 represents a substituted or unsubstituted fused heterocyclic group having four or less rings, and the others of X1, X2, X3, X4, X5, and X6 each represent a hydrogen atom.
    Type: Application
    Filed: December 12, 2007
    Publication date: November 12, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hiroki Ohrui, Akihito Saitoh, Chika Negishi, Hironobu Iwawaki, Masanori Muratsubaki, Hiroyuki Tomono, Tetsuya Kosuge, Akihiro Senoo
  • Publication number: 20090278447
    Abstract: An organic luminescent device having organic-compound layers is provided which takes on luminous hues with very good purity and has optical power with high efficiency, high luminance and a long life. At least one of the organic-compound layers contains a benzo[k]fluoranthene compound represented by the following general formula (1): wherein R1 is a group selected from the group consisting of alkyl, aralkyl and a heterocyclic group which may be substituted, and R1 's may be the same or different; R10 to R20 are each independently a group selected from the group consisting of hydrogen, halogen, alkyl, aralkyl, phenyl, a condensed bicyclic aromatic group and a heterocyclic group which may be substituted; and a is an integer of 0 or more to 9 or less.
    Type: Application
    Filed: July 18, 2007
    Publication date: November 12, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akihito Saitoh, Masanori Muratsubaki, Satoshi Igawa, Hiroki Ohrui, Chika Negishi, Masashi Hashimoto, Takao Takiguchi, Akihiro Senoo, Shinjiro Okada
  • Publication number: 20090184630
    Abstract: There are provided a condensed ring aromatic compound and an organic light-emitting device having an optical output with high efficiency and high luminance, and durability. An organic light-emitting device including: a pair of electrodes comprising an anode and a cathode of which at least one is transparent or translucent; and an organic compound layer disposed between the pair of electrodes, wherein the organic compound layer contains the condensed ring aromatic compound represented by the following formula [1].
    Type: Application
    Filed: March 27, 2008
    Publication date: July 23, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Chika Negishi, Akihito Saitoh, Hiroki Ohrui, Hironobu Iwawaki, Masanori Muratsubaki
  • Publication number: 20090091244
    Abstract: To realize extremely high luminous efficiency and to provide an organic light-emitting device having a optical output with a long lifetime. Provided is an amine compound represented by the general formula (1).
    Type: Application
    Filed: December 13, 2006
    Publication date: April 9, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Chika Negishi, Naoki Yamada, Keiji Okinaka, Minako Nakasu
  • Patent number: 7510781
    Abstract: Provided are a novel spiro compound, and an organic luminescence device using the spiro compound and having an optical output with an extremely high efficiency and a high luminance, and an extremely high durability. The Spiro compound is represented by the following general formula [I]: (wherein R1, R2, R3, and R4 represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted amino group, a cyano group, or a halogen atom, and R1, R2, R3, and R4 may be identical or different from each other; and Ar1 and Ar2 represent a substituted or unsubstituted condensed polycyclic aromatic group or a substituted or unsubstituted condensed polycyclic heterocyclic group, which may be identical or different from each other.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: March 31, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koichi Suzuki, Mizuho Hiraoki, Akihiro Senoo, Naoki Yamada, Chika Negishi, Akihito Saito
  • Patent number: 7387845
    Abstract: A novel monoamino compound is provided. Using the monoamino compound, an organic luminescence device is provided, which exhibits a luminescence hue with extremely high purity, and having an optical output of a high luminance with a high efficiency and a long life time.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: June 17, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihito Saitoh, Mizuho Hiraoka, Akihiro Senoo, Hiroshi Tanabe, Naoki Yamada, Chika Negishi
  • Publication number: 20080124573
    Abstract: The present invention provides an amine compound useful for an organic light-emitting device capable of realizing extremely high luminous efficiency and having a light output with a long lifetime can be formed. The amine compound is represented by the following general formula (1): wherein Ar1 to Ar8 each represent an aryl group or a heterocyclic group, R1 to R6 each represent a hydrogen atom, a halogen atom, an alkyl group, or the like, and X represents a biphenylene group, a fluorenylene group, or the like.
    Type: Application
    Filed: November 16, 2007
    Publication date: May 29, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Chika Negishi
  • Publication number: 20080124577
    Abstract: A novel organic compound and a high-performance organic light-emitting element containing the same. The organic light-emitting element contains a novel compound having a fluoranthene structure.
    Type: Application
    Filed: April 18, 2007
    Publication date: May 29, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akihito Saitoh, Keiji Okinaka, Satoshi Igawa, Naoki Yamada, Chika Negishi, Takao Takiguchi, Shinjiro Okada
  • Publication number: 20070252141
    Abstract: A fluoranthene compound has 6 fused rings. An organic light-emitting element uses the fluoranthene compound.
    Type: Application
    Filed: April 18, 2007
    Publication date: November 1, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Chika Negishi, Takao Takiguchi, Satoshi Igawa, Jun Kamatani, Naoki Yamada
  • Publication number: 20070249878
    Abstract: A high-performance organic light-emitting element and a novel organic compound realizing the above element are provided. A fluoranthene compound having a specific structure and an organic light-emitting element using the same are provided.
    Type: Application
    Filed: April 20, 2007
    Publication date: October 25, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hironobu Iwawaki, Chika Negishi, Shinjiro Okada, Takao Takiguchi, Akihiro Senoo, Masashi Hashimoto
  • Publication number: 20070228941
    Abstract: An amino compound for an organic light-emitting device of general formula [1]: wherein X1 is bonded to the pair of fluorenyl groups at meta-positions to each other and is substituted or unsubstituted aromatic ring, fused polycyclic ring, or heterocyclic ring; Y1 and Y2 are each substituted or unsubstituted alkyl, aryl, or heterocyclic and are the same or different; Z1 to Z4 are each hydrogen, halogen, or substituted or unsubstituted alkyl, aralkyl, alkenyl, alkynyl, alkoxy, aryl, or heterocyclic and are the same or different; R1 to R4 are each hydrogen, halogen, or substituted or unsubstituted alkyl, aryl, or heterocyclic and are the same or different; a and d are each 1 to 4; and b and c are each 1 to 3.
    Type: Application
    Filed: March 23, 2007
    Publication date: October 4, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shigemoto Abe, Akihiro Senoo, Naoki Yamada, Chika Negishi
  • Patent number: 7241513
    Abstract: A fluorene compound represented by the following general formula [I]: is used to provide an organic luminescent device. Such a device has an optical output exhibiting a high luminance with an extremely high efficiency, and has an extremely high durability.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: July 10, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koichi Suzuki, Mizuho Hiraoka, Akihiro Senoo, Naoki Yamada, Chika Negishi, Akihito Saitoh, Daisaku Tanaka, Ryoji Yashiro
  • Patent number: 7229702
    Abstract: The present invention provides an oligofluorenylene compound represented by the general formula below, which enables production of an organic light-emitting device that exhibits an extremely pure luminescent hue and has a light emission of high efficiency, high brightness, and long lifetime.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: June 12, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihito Saitoh, Mizuho Hiraoka, Koichi Suzuki, Akihiro Senoo, Hiroshi Tanabe, Naoki Yamada, Chika Negishi, Maki Okajima
  • Publication number: 20060286408
    Abstract: Provided a novel 1,8-naphthyridine compound represented by the following general formula [I]: wherein R1 to R6 each represent one selected from the group consisting of a hydrogen atom; an alkyl group, an aralkyl group, an aryl group, a heterocyclic group, a condensed polycyclic aromatic group, a condensed polycyclic heterocyclic group and an aryloxy group which may be substituted; a substituted amino group; a halogen atom; a trifluromethyl group; and a cyano group, and may be the same as or different from one another, provided that at least two of R1 to R6 each represent one selected from the group consisting of an aralkyl group, an aryl group, a heterocyclic group, a condensed polycyclic aromatic group, a condensed polycyclic heterocyclic group and an aryloxy group which may be substituted; and a substituted amino group.
    Type: Application
    Filed: June 20, 2006
    Publication date: December 21, 2006
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Koichi Suzuki, Hiroshi Tanabe, Chika Negishi, Taiki Watanabe, Akihiro Senoo, Kazunori Ueno
  • Publication number: 20060166034
    Abstract: Novel monoaminofluorene compounds are provided, and organic light-emitting devices which exhibit good luminescence hue of extremely high purity and have optical output with high luminescence efficiency, high luminance and longer operating life are provided using the compounds.
    Type: Application
    Filed: August 12, 2003
    Publication date: July 27, 2006
    Applicant: Canon Kabushiki Kaisha
    Inventors: Akihito Saitoh, Mizuho Hiraoka, Koichi Suzuki, Akihiro Senoo, Hiroshi Tanabe, Naoki Yamada, Chika Negishi