Patents by Inventor Yoriyuki Takashima
Yoriyuki Takashima 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).
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Publication number: 20120139410Abstract: An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. In the organic electroluminescence device, the organic thin-film layer includes at least one emitting layer, and the at least one emitting layer contains: at least one phosphorescent material; and a host material represented by the following formula (1).Type: ApplicationFiled: December 7, 2011Publication date: June 7, 2012Applicant: Idemitsu Kosan Co., Ltd.Inventors: Kazuki NISHIMURA, Toshihiro IWAKUMA, Kenichi FUKUOKA, Chishio HOSOKAWA, Masahiro KAWAMURA, Mitsunori ITO, Yoriyuki TAKASHIMA, Toshinari OGIWARA
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Patent number: 8154195Abstract: An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. In the organic electroluminescence device, the organic thin-film layer includes at least one emitting layer, and the at least one emitting layer contains: at least one phosphorescent material; and a host material represented by the following formula (1). Ra—Ar1—Ar2—Rb??(1) In the formula, Ar1, Ar2, Ra and Rb each represent a substituted or unsubstituted benzene ring or a substituted or unsubstituted condensed aromatic hydrocarbon group selected from a group consisting of a naphthalene ring, a chrysene ring, a fluoranthene ring, a triphenylene ring, a phenanthrene ring, a benzophenanthrene ring, a dibenzophenanthrene ring, a benzotriphenylene ring, a benzochrysene ring, a picene ring and a benzo[b]fluoranthene ring.Type: GrantFiled: May 16, 2008Date of Patent: April 10, 2012Assignee: Idemitsu Kosan Co., Ltd.Inventors: Kazuki Nishimura, Toshihiro Iwakuma, Kenichi Fukuoka, Chishio Hosokawa, Masahiro Kawamura, Mitsunori Ito, Yoriyuki Takashima, Toshinari Ogiwara
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Publication number: 20120007059Abstract: An organic electroluminescence device composed of a cathode, an anode, and an organic thin film layer between the cathode and the anode. The organic thin film layer includes one or more layers. At least one layer of the organic thin film layer is a light emitting layer and at least one light emitting layer contains a compound which is asymmetric with respect to the central benzene ring and a phosphorescent emitting material. The compound provides an organic electroluminescence device with long lifetime and high current efficiency.Type: ApplicationFiled: December 24, 2009Publication date: January 12, 2012Applicant: IDEMITSU KOSAN CO., LTD.Inventors: Toshihiro Iwakuma, Yoriyuki Takashima, Toshinari Ogiwara
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Publication number: 20110315965Abstract: An organic electroluminescence device and a material for producing the organic electroluminescence device. The organic electroluminescence device includes an organic thin film layer between a cathode and an anode, the organic thin film layer including one or more layers, in which the organic thin film layer includes one or more light emitting layers and at least one of the light emitting layers includes a phosphorescent material and a host material. The host material has an essential structure in which a naphthalene ring is bonded to a fluorene skeleton, dibenzofuran skeleton, or dibenzothiophene skeleton. The organic electroluminescence device is a phosphorescent device having high efficiency and long lifetime.Type: ApplicationFiled: December 22, 2009Publication date: December 29, 2011Applicant: IDEMITSU KOSAN CO., LTD.Inventors: Yoriyuki Takashima, Toshihiro Iwakuma, Toshinari Ogiwara, Chishio Hosokawa, Mitsunori Ito
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Publication number: 20110303907Abstract: A material for organic electroluminescent devices including a 2,7-disubstituted naphthalene ring in its molecule and an organic electroluminescent device including an organic thin film layer having one or more layers between a cathode and an anode. An organic electroluminescence device having the organic thin film layer which includes the material for organic electroluminescent devices and at least one kind of phosphorescent emitting materials has long lifetime and high current efficiency.Type: ApplicationFiled: December 25, 2009Publication date: December 15, 2011Applicant: IDEMITSU KOSAN CO., LTD.Inventors: Toshihiro Iwakuma, Yoriyuki Takashima, Toshinari Ogiwara
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Publication number: 20110278561Abstract: To attain an organic electroluminescence device having a long lifetime and high luminous efficiency, and is capable of emitting blue light having a high color purity, and an aromatic amine derivative for realizing the device, the present invention provides an aromatic amine derivative having a specific structure, and an organic electroluminescence device including an organic thin film layer composed of one or more layers including at least a light emitting layer and interposed between a cathode and an anode, in which at least one layer of the organic thin film layer contains the aromatic amine derivative alone or as a component of a mixture.Type: ApplicationFiled: July 25, 2011Publication date: November 17, 2011Applicant: Idemitsu Kosan Co., Ltd.Inventors: Chishio HOSOKAWA, Yoriyuki Takashima, Masakazu Funahashi
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Patent number: 8039127Abstract: An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. In the organic electroluminescence device, at least one layer of the organic thin-film layer includes: an organic-electroluminescence-device material represented by a general formula selected from the following formulae (1), (2) and (3); and at least one phosphorescent material. In the formula: A represents a group selected from a 3-fluoranthenyl group, 5-benzo[c]phenanthrenyl group, 6-benzo[c]phenanthrenyl group and 10-benzo[g]chrysenyl group; Ar represents a fused aromatic ring having 10 to 30 carbon atoms and having triplet energy of 2.10 eV or more; and A or Ar is allowed to be substituted by a phenyl group or a naphthyl group.Type: GrantFiled: April 22, 2009Date of Patent: October 18, 2011Assignee: Idemitsu Kosan Co., Ltd.Inventors: Toshihiro Iwakuma, Yoriyuki Takashima, Mitsunori Ito, Toshinari Ogiwara
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Patent number: 8039129Abstract: An organic electroluminescence device includes: a cathode; an anode; and an organic thin-film layer including at least one layer and provided between the cathode and the anode. At least one layer of the organic thin-film layer includes: an organic-electroluminescence-device material represented by any one of the following formulae (1), (2) and (3); and at least one phosphorescent material, in which the organic-electroluminescence-device material may have a substituent. A or Ar may be substituted by a phenyl group or a naphthyl group.Type: GrantFiled: April 6, 2010Date of Patent: October 18, 2011Assignee: Idemitsu Kosan Co., Ltd.Inventors: Toshihiro Iwakuma, Yoriyuki Takashima, Mitsunori Ito, Toshinari Ogiwara
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Patent number: 8034256Abstract: A naphthalene derivative represented by the following formula (1) is provided. In the formula (1), Ar1 and Ar2 each represent an aromatic hydrocarbon cyclic group having 6 to 18 carbon atoms forming a ring. The aromatic hydrocarbon cyclic group has none of anthracene skeleton, pyrene skeleton, aceanthrylene skeleton and naphthacene skeleton. Ar3 represents a benzene skeleton or a naphthalene skeleton. R1 and R2 each represent an alkyl group, a cycloalkyl group, an alkoxy group, a cyano group, a silyl group or a halogen atom. a and b each represent an integer in a range of 0 to 4. m and n each represent an integer in a range of 1 to 4.Type: GrantFiled: April 14, 2008Date of Patent: October 11, 2011Assignee: Idemitsu Kosan Co., Ltd.Inventors: Masahiro Kawamura, Kazuki Nishimura, Yoriyuki Takashima, Mitsunori Ito, Toshihiro Iwakuma, Toshinari Ogiwara, Chishio Hosokawa, Kenichi Fukuoka
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Patent number: 8029697Abstract: A naphthalene derivative represented by the following formula (1) is provided. In the formula (1), Ar1 to Ar6 each represent a substituted or unsubstituted aromatic hydrocarbon cyclic group having 6 to 18 carbon atoms forming a ring. The substituted or unsubstituted aromatic hydrocarbon cyclic group has none of anthracene skeleton, pyrene skeleton, aceanthrylene skeleton and naphthacene skeleton. R1 to R3 each represent an alkyl group, a cycloalkyl group, an alkoxy group, a cyano group, a silyl group or a halogen atom. R1 to R3 each may be bonded in any position of a main-chain naphthalene skeleton or a main-chain benzene skeleton. a and b each represent an integer in a range of 0 to 4. l, m, n and p each represent 0 or 1.Type: GrantFiled: April 14, 2008Date of Patent: October 4, 2011Assignee: Idemitsu Kosan Co., Ltd.Inventors: Masahiro Kawamura, Kazuki Nishimura, Yoriyuki Takashima, Mitsunori Ito, Toshihiro Iwakuma, Toshinari Ogiwara, Chishio Hosokawa, Kenichi Fukuoka
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Patent number: 8025815Abstract: A naphthalene derivative represented by the following formula (1) is provided. In the formula, Ar1 to Ar4 each represent an aromatic hydrocarbon cyclic group having 6 to 18 carbon atoms forming a ring. The aromatic hydrocarbon cyclic group has none of anthracene skeleton, pyrene skeleton, aceanthrylene skeleton and naphthacene skeleton. n, m and l each represent an integer in a range of 1 to 5. p represents an integer in a range of 0 to 5. When n, m, l and p each are 2 or more, a plurality of Ar1 to Ar4 may be mutually the same or different.Type: GrantFiled: April 14, 2008Date of Patent: September 27, 2011Assignee: Idemitsu Kosan Co., Ltd.Inventors: Masahiro Kawamura, Kazuki Nishimura, Yoriyuki Takashima, Mitsunori Ito, Toshihiro Iwakuma, Toshinari Ogiwara, Chishio Hosokawa, Kenichi Fukuoka
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Patent number: 8022253Abstract: To attain an organic electroluminescence device having a long lifetime and high luminous efficiency, and is capable of emitting blue light having a high color purity, and an aromatic amine derivative for realizing the device, the present invention provides an aromatic amine derivative having a specific structure, and an organic electroluminescence device including an organic thin film layer composed of one or more layers including at least a light emitting layer and interposed between a cathode and an anode, in which at least one layer of the organic thin film layer contains the aromatic amine derivative alone or as a component of a mixture.Type: GrantFiled: April 18, 2007Date of Patent: September 20, 2011Assignee: Idemitsu Kosan Co., Ltd.Inventors: Chishio Hosokawa, Yoriyuki Takashima, Masakazu Funahashi
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Patent number: 8021574Abstract: A naphthalene derivative represented by the following formula (1) is provided. In the formula, Ar1 to Ar4 each represent an aromatic hydrocarbon cyclic group having 6 to 18 carbon atoms forming a ring. The aromatic hydrocarbon cyclic group has none of anthracene skeleton, pyrene skeleton, aceanthrylene skeleton and naphthacene skeleton. n, m and l each represent an integer in a range of 1 to 5. p represents an integer in a range of 0 to 5. When n, m, l and p each are 2 or more, a plurality of Ar1 to Ar4 may be mutually the same or different.Type: GrantFiled: April 14, 2008Date of Patent: September 20, 2011Assignee: Idemitsu Kosan Co., Ltd.Inventors: Masahiro Kawamura, Kazuki Nishimura, Yoriyuki Takashima, Mitsunori Ito, Toshihiro Iwakuma, Toshinari Ogiwara, Chishio Hosokawa, Kenichi Fukuoka
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Publication number: 20100331585Abstract: A phenanthrene derivative is represented by a formula (1) below. In the formula (1), Ar1 and Ar2 each represent an aromatic hydrocarbon ring group having 6 to 18 carbon atoms for forming the ring. The aromatic hydrocarbon ring group contains none of anthracene skeleton, pyrene skeleton, aceanthrylene skeleton and naphthacene skeleton. R1 represents a substituent, the number of which may be 0, 1 or more. R1 may be bonded in any position of the phenanthrene skeleton. n and m each represent an integer of 1 to 3. k represents an integer of 0 to 8.Type: ApplicationFiled: July 4, 2008Publication date: December 30, 2010Applicant: Idemitsu Kosan Co., Ltd.Inventors: Masahiro Kawamura, Kazuki Nishimura, Yoriyuki Takashima, Mitsunori Ito, Toshihiro Iwakuma, Toshinari Ogiwara
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Publication number: 20100327230Abstract: A phenanthrene derivative is represented by a formula (1) below. In the formula (1), Ar1 to Ar4 each represent an aromatic hydrocarbon ring group having 6 to 18 carbon atoms for forming the ring. The aromatic hydrocarbon ring group contains none of anthracene skeleton, pyrene skeleton, aceanthrylene skeleton and naphthacene skeleton. L represents a single bond, a substituted or unsubstituted benzene skeleton, naphthalene skeleton, biphenylene skeleton, fluorene skeleton, phenanthrene skeleton, fluoranthene skeleton, triphenylene skeleton, chrysene skeleton, phenyl-naphthalene skeleton or binaphthalene skeleton. R1 and R2 each represent a substituent, the number of which may be 0, 1 or more. R1 and R2 may be bonded in any positions of the phenanthrene skeleton. m, n, l and p each represent 0 or 1 while satisfying m+n+l+p?1 (m,n?l,p). a and b each represent an integer of 0 to 8.Type: ApplicationFiled: July 4, 2008Publication date: December 30, 2010Applicant: Idemitsu Kosan Co., Ltd.Inventors: Masahiro Kawamura, Kazuki Nishimura, Yoriyuki Takashima, Mitsunori Ito, Toshihiro Iwakuma, Toshinari Ogiwara
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Patent number: 7851073Abstract: It is an object of the present invention to provide a novel compound useful as a constituent of an organic EL element and the use of the compound permits the realization of a highly practical organic EL element whose driving voltage is substantially low and which has a low leakage current.Type: GrantFiled: September 14, 2007Date of Patent: December 14, 2010Assignee: Idemitsu Kosan Co., Ltd.Inventors: Tetsuya Inoue, Masakazu Funahashi, Yoriyuki Takashima
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Patent number: 7838130Abstract: A novel compound which is useful as a constitutional component for an organic EL device is provided by an aminodibenzofluorene derivative comprising (A) at least one dibenzofluorene structure and (B) at least one amino group in a molecule, a material for an organic electroluminescence (EL) device comprising the same, a light emitting material for an organic EL device, a light emitting organic solution, an organic EL device in which an organic compound layer comprising a single layer or plural layers including at least a light emitting layer is interposed between a pair of electrodes, wherein at leas one layer in the organic compound layer described above contains at least one kind of the aminodibenzofluorene derivative described above and an equipment comprising the same. A practical organic EL device which has a low operating voltage, a long lifetime and a high current efficiency and which provides blue light emission having an excellent color purity is materialized by using the above compound.Type: GrantFiled: October 30, 2007Date of Patent: November 23, 2010Assignee: Idemitsu Kosan Co., Ltd.Inventors: Yoriyuki Takashima, Masakazu Funahashi
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Publication number: 20100258791Abstract: An organic electroluminescence device includes: a cathode; an anode; and an organic thin-film layer including at least one layer and provided between the cathode and the anode. At least one layer of the organic thin-film layer includes: an organic-electroluminescence-device material represented by any one of the following formulae (1), (2) and (3); and at least one phosphorescent material, in which the organic-electroluminescence-device material may have a substituent. A or Ar may be substituted by a phenyl group or a naphthyl group.Type: ApplicationFiled: April 6, 2010Publication date: October 14, 2010Applicant: Idemitsu Kosan Co., Ltd.Inventors: Toshihiro IWAKUMA, Yoriyuki Takashima, Mitsunori Ito, Toshinari Ogiwara
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Publication number: 20100253211Abstract: An organic electroluminescence device includes: a cathode; an anode; and a single-layered or multilayered organic thin-film layer provided between the cathode and the anode. In the organic electroluminescence device, at least one layer of the organic thin-film layer includes: an organic-electroluminescence-device material represented by a general formula selected from the following formulae (1), (2) and (3); and at least one phosphorescent material. In the formula: A represents a group selected from a 3-fluoranthenyl group, 5-benzo[c]phenanthrenyl group, 6-benzo[c]phenanthrenyl group and 10-benzo[g]chrysenyl group; Ar represents a fused aromatic ring having 10 to 30 carbon atoms and having triplet energy of 2.10 eV or more; and A or Ar is allowed to be substituted by a phenyl group or a naphthyl group.Type: ApplicationFiled: April 22, 2009Publication date: October 7, 2010Applicant: Idemitsu Kosan Co., Ltd.Inventors: Toshihiro IWAKUMA, Yoriyuki TAKASHIMA, Mitsunori ITO, Toshinari OGIWARA
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Publication number: 20100194270Abstract: A chrysene derivative shown by the following formula: wherein R1 to R10 and R21 to R25 are independently a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 10 ring carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 8 to 30 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 20 ring carbon atoms, provided that at least one of R21 to R25 is a substituted or unsubstituted fused aromatic ring group having 10 to 20 ring carbon atoms or a substituted or unsubstituted fluorenyl group.Type: ApplicationFiled: July 2, 2008Publication date: August 5, 2010Applicant: IDEMITSU KOSAN CO., LTD.Inventors: Masahiro Kawamura, Kazuki Nishimura, Toshihiro Iwakuma, Kenichi Fukuoka, Chishio Hosokawa, Masakazu Funahashi, Tetsuya Inoue, Yukitoshi Jinde, Yuichiro Kawamura, Mitsunori Ito, Yoriyuki Takashima, Toshinari Ogiwara