Patents by Inventor Keiji Okinaka

Keiji Okinaka 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: 20090278446
    Abstract: There is provided a green-light-emitting device which has a high emission efficiency and a long continuous operational life, and which includes a pair of electrodes including an anode and a cathode; and a layer including an organic compound disposed between the pair of electrodes, wherein the layer includes a first compound represented by the general formula (I): wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, and R16 each represent, independently of one another, a hydrogen atom, an alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted amino group, or a halogen atom; and a second compound with a pyrene skeleton or a fluorene skeleton having an energy gap larger than an energy gap of the first compound.
    Type: Application
    Filed: March 3, 2008
    Publication date: November 12, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Satoshi Igawa, Masashi Hashimoto, Shinjiro Okada, Takao Takiguchi, Keiji Okinaka
  • Patent number: 7604873
    Abstract: It is an object of the present invention to provide an organic light emitting device having a long-life optical output. The organic light emitting device according to the present invention is provided with an emission layer including at least a host material, a light emitting material, and another material, wherein the another material has a smaller ionization potential than and almost the same hole mobility as or a greater hole mobility than an ionization potential and a hole mobility of a compound which forms an emission layer-side-interface.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: October 20, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Okinaka, Akihito Saitoh, Naoki Yamada, Masataka Yashima, Koichi Suzuki, Akihiro Senoo, Kazunori Ueno
  • Publication number: 20090218940
    Abstract: A novel phenanthroline compound is provided which is represented by the general formula [I]: (wherein R1, R2, R3, R4, R5 and R6 are the same or different and each is selected from a hydrogen atom, an unsubstituted or substituted alkyl group, an unsubstituted or substituted aralkyl group, an unsubstituted or substituted aryl group, an unsubstituted or substituted heterocyclic group, and a halogen atom; and Ar1 and Ar2 are the same or different and each is selected from an unsubstituted or substituted fluorenyl group, an unsubstituted or substituted fluoranthenyl group, an unsubstituted or substituted perylenyl group, and an unsubstituted or substituted carbazolyl group). An organic light emitting device using the phenanthroline compound is also provided that has a light output with a high efficiency and a high luminance and has a high long-term durability.
    Type: Application
    Filed: May 6, 2009
    Publication date: September 3, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Maki Okajima, Tatsundo Kawai, Takao Takiguchi, Koichi Suzuki, Akihiro Senoo, Toshinori Hasegawa, Keiji Okinaka
  • Patent number: 7550594
    Abstract: A novel phenanthroline compound is provided which is represented by the general formula [I]: (wherein R1, R2, R3, R4, R5 and R6 are the same or different and each is selected from a hydrogen atom, an unsubstituted or substituted alkyl group, an unsubstituted or substituted aralkyl group, an unsubstituted or substituted aryl group, an unsubstituted or substituted heterocyclic group, and a halogen atom; and Ar1 and Ar2 are the same or different and each is selected from an unsubstituted or substituted fluorenyl group, an unsubstituted or substituted fluoranthenyl group, an unsubstituted or substituted perylenyl group, and an unsubstituted or substituted carbazolyl group). An organic light emitting device using the phenanthroline compound is also provided that has a light output with a high efficiency and a high luminance and has a high long-term durability.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: June 23, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Maki Okajima, Tatsundo Kawai, Takao Takiguchi, Koichi Suzuki, Akihiro Senoo, Toshinori Hasegawa, Keiji Okinaka
  • Publication number: 20090096368
    Abstract: The present invention provides a high-performance organic EL device and a novel compound used for the device. The novel compound of the present invention is a fluoranthene compound having a specific structure. The organic EL device of the present invention is an organic EL device comprising: an anode; a cathode; and an organic compound layer interposed between the anode and the cathode, wherein the organic compound layer has the fluoranthene compound.
    Type: Application
    Filed: April 19, 2007
    Publication date: April 16, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jun Kamatani, Shinjiro Okada, Takao Takiguchi, Akihito Saitoh, Keiji Okinaka, Satoshi Igawa, Naoki Yamada, Masashi Hashimoto
  • 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
  • Publication number: 20090079344
    Abstract: Provided is a novel dibenzo[a,c]anthracene compound having substituents, which can be used in an organic light emitting device.
    Type: Application
    Filed: April 19, 2007
    Publication date: March 26, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akihito Saitoh, Keiji Okinaka, Satoshi Igawa, Jun Kamatani, Naoki Yamada, Masashi Hashimoto, Masanori Muratsubaki, Takao Takiguchi, Akihiro Senoo, Shinjiro Okada, Minako Nakasu
  • Publication number: 20090079331
    Abstract: There are provided a compound represented by the general formula (1) and an organic light-emitting device which comprises the compound and has an optical output with remarkably high efficiency and high luminance.
    Type: Application
    Filed: December 8, 2006
    Publication date: March 26, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Satoshi Igawa, Shinjiro Okada, Takao Takiguchi, Keiji Okinaka, Naoki Yamada, Masashi Hashimoto
  • Publication number: 20090066227
    Abstract: An object of the present invention is to provide an organic blue-light-emitting device having high emission efficiency and a long continuous driving lifetime. The organic light-emitting device include a layer containing a first compound having a fluoranthene skeleton and a second compound having a pyrene skeleton, the second compound having an energy gap larger than that of the first compound, wherein EL1 representing the energy of the lowest unoccupied molecular orbit (LUMO) of the first compound and EL2 representing the energy of the LUMO of the second compound satisfy a relationship of EL2?EL1?0.15 eV.
    Type: Application
    Filed: August 12, 2006
    Publication date: March 12, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Keiji Okinaka, Naoki Yamada, Satoshi Igawa, Jun Kamatani, Masataka Yashima
  • Patent number: 7491450
    Abstract: Provided is an organic electroluminescent device having a high-efficiency optical output with high luminance and long life, which includes at least: a pair of electrodes comprising an anode and a cathode; and one or more organic-compound-containing layers sandwiched between the pair of electrodes, and in which among the organic-compound-containing layers, at least one layer having a light-emitting region contains a first compound represented by the following general formula [1] and a second compound having a band gap larger than a band gap of the first compound.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: February 17, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Okinaka, Akihito Saitoh, Koichi Suzuki, Akihiro Senoo, Kazunori Ueno
  • Publication number: 20090033210
    Abstract: To provide a novel fluoranthene derivative and an organic light emitting device having the fluoranthene derivative.
    Type: Application
    Filed: April 19, 2007
    Publication date: February 5, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akihito Saitoh, Keiji Okinaka, Satoshi Igawa, Jun Kamatani, Naoki Yamada, Masashi Hashimoto, Masanori Muratsubaki, Takao Takiguchi, Akihiro Senoo, Shinjiro Okada, Minako Nakasu
  • Patent number: 7466074
    Abstract: In an organic light-emitting device which uses, in particular, a light-emitting layer material having a wide band gap, a lowering in emission intensity due to continuous driving is alleviated while maintaining a high emission efficiency. There is provided an organic light-emitting device in which a hole-transporting layer contains a second component in addition to a main component; an energy of a lowest triplet excited state of the second component is less than an energy of a lowest triplet excited state of the main component of the hole-transporting layer; a lowest unoccupied molecular orbital energy of the second component is higher than a lowest unoccupied molecular orbital energy of the main component of a light-emitting layer; and the second component has an energy gap of 2.7 eV or more.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: December 16, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Okinaka, Naoki Yamada, Akihito Saitoh
  • Publication number: 20080268285
    Abstract: Provided is an organic electroluminescent device for emitting blue light, which has high luminous efficiency and good drive durability. This organic electroluminescent device for emitting blue light includes an anode 2, a cathode 6, and a layer which contains an organic compound interposed between the anode 2 and the cathode 6, the layer which contains an organic compound including at least a light-emitting layer 4, wherein the light-emitting layer 4 contains a bipolar host having a hole mobility and an electron mobility of 10?4 cm2/s or greater, a light-emitting dopant and a carrier trapping dopant, and the light-emitting dopant energy gap EgB, the bipolar host energy gap Egh, and the carrier trapping dopant energy gap Egd are such that Egd>Egh>EgB.
    Type: Application
    Filed: April 15, 2008
    Publication date: October 30, 2008
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Keiji Okinaka, Masataka Yashima, Akihito Saitoh, Naoki Yamada
  • 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
  • Patent number: 7375250
    Abstract: There is provided an aminoanthryl derivative substitution compound represented by the following general formula (1).
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: May 20, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihito Saitoh, Akihiro Senoo, Kazunori Ueno, Keiji Okinaka, Koichi Suzuki
  • Patent number: 7358409
    Abstract: There is disclosed a substituted anthryl derivative is represented by the following general formula (1).
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: April 15, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihito Saitoh, Akihiro Senoo, Kazunori Ueno, Keiji Okinaka, Koichi Suzuki
  • Patent number: 7355339
    Abstract: An organic electroluminescent display includes an organic electroluminescent device, having a microcavity structure, for emitting light resonating in the microcavity structure; a light-shielding layer having an opening through which a portion of the light emitted from the organic electroluminescent device passes; and a light-gathering structure, disposed between the organic electroluminescent device and the light-shielding layer, for gathering the light emitted from the organic electroluminescent device.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: April 8, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Okinaka, Hikaru Hoshi
  • Patent number: 7309533
    Abstract: An anthryl derivative group substituted compound having a specific chemical structure is provided. This compound is used for producing an organic luminescent device which can emit luminescent hues with a very high purity and effect light emission with a high luminescence efficiency and a long lifetime.
    Type: Grant
    Filed: August 9, 2006
    Date of Patent: December 18, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihito Saitoh, Koichi Suzuki, Akihiro Senoo, Kazunori Ueno, Keiji Okinaka
  • Publication number: 20070205713
    Abstract: In an organic light-emitting device which uses, in particular, a light-emitting layer material having a wide band gap, a lowering in emission intensity due to continuous driving is alleviated while maintaining a high emission efficiency. There is provided an organic light-emitting device in which a hole-transporting layer contains a second component in addition to a main component; an energy of a lowest triplet excited state of the second component is less than an energy of a lowest triplet excited state of the main component of the hole-transporting layer; a lowest unoccupied molecular orbital energy of the second component is higher than a lowest unoccupied molecular orbital energy of the main component of a light-emitting layer; and the second component has an energy gap of 2.7 eV or more.
    Type: Application
    Filed: October 12, 2006
    Publication date: September 6, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Keiji Okinaka, Naoki Yamada, Akihito Saitoh
  • Publication number: 20070155998
    Abstract: A novel pyrenylfluorenylene compound is provided which is represented by the general formula (1):
    Type: Application
    Filed: November 2, 2006
    Publication date: July 5, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: AKIHITO SAITOH, NAOKI YAMADA, KEIJI OKINAKA, KOICHI SUZUKI, AKIHIRO SENOO