Patents by Inventor Yuichiro Kawamura

Yuichiro Kawamura 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: 20100295445
    Abstract: An organic electroluminescence device containing an anode, an emitting layer, a blocking layer, an electron-injecting layer and a cathode in sequential order; wherein the emitting layer contains a host and a dopant which gives fluorescent emission of which the main peak wavelength is 550 nm or less; the affinity Ad of the dopant is smaller than the affinity Ah of the host; the triplet energy ETd of the dopant is larger than the triplet energy ETh of the host; the triplet energy ETb of the blocking layer is larger than ETh; the affinity Ab of the blocking layer and the affinity Ae of the electron-injecting layer satisfies Ae?Ab?0.2 eV; and the electron mobility of the material constituting the blocking layer is 10?6 cm2/Vs or more in an electric field intensity of 0.04 to 0.5 MV/cm.
    Type: Application
    Filed: June 4, 2009
    Publication date: November 25, 2010
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Hitoshi Kuma, Yuichiro Kawamura, Yukitoshi Jinde, Toshinari Ogiwara, Chishio Hosokawa
  • Publication number: 20100194270
    Abstract: 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: Application
    Filed: July 2, 2008
    Publication date: August 5, 2010
    Applicant: 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
  • Publication number: 20100187519
    Abstract: A material for an organic electroluminescence device including at least one of compounds shown by the following formula (Ia), (Ib), (IIa), (IIb), (III), (IVa) or (IVb):
    Type: Application
    Filed: June 30, 2008
    Publication date: July 29, 2010
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Hironobu Morishita, Yuichiro Kawamura
  • Publication number: 20090315022
    Abstract: An azaindenofluorenedione derivative shown by the following formula (I), (IIa) or (IIb):
    Type: Application
    Filed: November 28, 2008
    Publication date: December 24, 2009
    Applicant: Idemitsu Kosan Co., Ltd.
    Inventors: Hironobu MORISHITA, Yuichiro KAWAMURA
  • Publication number: 20090284134
    Abstract: An organic compound having excellent heat resistance, an excellent amorphous nature, an excellent ability to transport charges, highly excited singlet and triplet states, and excellent solubility in an organic solvent is an organic compound represented by Formula (I): wherein Ar1 represents an optionally-substituted aromatic hydrocarbon group, an optionally-substituted aromatic heterocyclic group, or an optionally-substituted alkyl group; Ar2 represents an optionally-substituted aromatic hydrocarbon group or an optionally-substituted aromatic heterocyclic group; R1 and R2 each represent a hydrogen atom or a substituent, and R1 and R2 may be bonded to each other to form a ring; and Q is represented by Formula (I-1) or (I-2): wherein Ar3 to Ar5 each represent an optionally-substituted aromatic hydrocarbon group or an optionally-substituted aromatic heterocyclic group, and Ar3 and Ar4 may be bonded to each other to form a ring.
    Type: Application
    Filed: November 22, 2006
    Publication date: November 19, 2009
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Koichiro IIDA, Yuichiro Kawamura, Tomoyuki Ogata, Masayoshi Yabe, Misako Okake, Masako Takeuchi, Kazuki Okabe
  • Publication number: 20090066223
    Abstract: A composition for an organic electroluminescent device is a composition for forming an organic light emitting layer of an organic electroluminescent device by wet coating process. The composition contains a phosphorescent material, a charge transport material, and a solvent, in which the phosphorescent material and the charge transport material are each an unpolymerized organic compound, and the first oxidation potential of the phosphorescent material ED+, the first reduction potential of the phosphorescent material ED?, the first oxidation potential of the charge transporting material ET+, and the first reduction potential of the charge transporting material ET? satisfy the following condition: ET?+0.1?ED?<ET+?ED+?0.1 or ED?+0.1?ET?<ED+?ET+0.1.
    Type: Application
    Filed: February 14, 2006
    Publication date: March 12, 2009
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Masayoshi Yabe, Tomoyuki Ogata, Hideki Sato, Koichiro Iida, Asato Tanaka, Mitsuru Tanamura, Yuichiro Kawamura, Hironori Ishikawa, Kazuki Okabe
  • Publication number: 20080118773
    Abstract: A complex composition characterized by comprising a polymer having repeating units represented by the formula (1) and a metal complex which luminesces in its triplet excited state; and a polymer complex compound characterized by comprising repeating units represented by the formula (1) and a metal complex structure which luminesces in its triplet excited state and by emitting visible light in a solid state. (1) (Ar1 and Ar2 each independently represents a trivalent aromatic hydrocarbon group or trivalent heterocyclic group; Ar3 represents an aromatic hydrocarbon group or heterocyclic group, provided that the ring Ar3 has bonded thereto one or more groups selected from the group consisting of alkyl, alkoxy, alkylthio, alkylsilyl, alkylamino, aryl, aryloxy, arylalkyl, arylalkoxy, arylalkenyl, arylalkynyl, arylamino, monovalent heterocyclic groups, and cyano; and X represents a single bond or connecting group.
    Type: Application
    Filed: March 25, 2004
    Publication date: May 22, 2008
    Inventors: Satoshi Mikami, Masaaki Yokoyama, Yuichiro Kawamura