Patents by Inventor Sachiko Yamagata

Sachiko Yamagata 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: 7914911
    Abstract: It is an object of the present invention to provide a luminescent material that has resistance to repeated oxidation reactions. Further, it is an object of the present invention to provide a light-emitting element that is high in luminous efficiency. Further, it is an object of the present invention to provide a light-emitting element that has a long life. An aspect of the present invention is an anthracene derivative represented by a general formula (1). In the general formula (1), R2 to R4 and R7 to R9 are individually any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a group represented by the following structure formula (2), and R1, R5, R6, and R10 are individually any one of hydrogen and an alkyl group having 1 to 4 carbon atoms.
    Type: Grant
    Filed: April 15, 2009
    Date of Patent: March 29, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Sachiko Yamagata, Ryoji Nomura, Kumi Kojima, Satoshi Seo
  • Publication number: 20090200917
    Abstract: It is an object of the present invention to provide a luminescent material that has resistance to repeated oxidation reactions. Further, it is an object of the present invention to provide a light-emitting element that is high in luminous efficiency. Further, it is an object of the present invention to provide a light-emitting element that has a long life. An aspect of the present invention is an anthracene derivative represented by a general formula (1). In the general formula (1), R2 to R4 and R7 to R9 are individually any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a group represented by the following structure formula (2), and R1, R5, R6, and R10 are individually any one of hydrogen and an alkyl group having 1 to 4 carbon atoms.
    Type: Application
    Filed: April 15, 2009
    Publication date: August 13, 2009
    Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
    Inventors: Sachiko YAMAGATA, Ryoji NOMURA, Kumi KOJIMA, Satoshi SEO
  • Patent number: 7541099
    Abstract: It is an object of the present invention to provide a luminescent material that has resistance to repeated oxidation reactions. Further, it is an object of the present invention to provide a light-emitting element that is high in luminous efficiency. Further, it is an object of the present invention to provide a light-emitting element that has a long life. An aspect of the present invention is an anthracene derivative represented by a general formula (1). In the general formula (1), R2 to R4 and R7 to R9 are individually any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a group represented by the following structure formula (2), and R1, R5, R6, and R10 are individually any one of hydrogen and an alkyl group having 1 to 4 carbon atoms.
    Type: Grant
    Filed: May 2, 2005
    Date of Patent: June 2, 2009
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Sachiko Yamagata, Ryoji Nomura, Kumi Kojima, Satoshi Seo
  • Patent number: 7371470
    Abstract: A light-emitting compound that can be easily applied to vacuum vapor deposition and exhibit long wavelength light is disclosed. Further, a light-emitting element without inferior luminescence properties due to the carbonization of a light-emitting compound during vapor deposition; and a light-emitting device that is composed of the light-emitting elements are also disclosed. A pyran derivative is represented by the following general formula 1: wherein R1 is a hydrogen element or an alkoxy group.
    Type: Grant
    Filed: April 4, 2007
    Date of Patent: May 13, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Sachiko Yamagata, Hiroko Abe, Nobuharu Ohsawa, Ryoji Nomura, Satoshi Seo
  • Patent number: 7364804
    Abstract: A light-emitting compound that has excellent carrier transportation properties and that can exhibit long wavelength light is disclosed. Further, a method for manufacturing the light-emitting compound in a high yield is disclosed. The disclosed light-emitting compound is a pyran derivative as represented by general formula 1: wherein A1 and A2 are individually a ?-conjugated system group having 6 to 16 conjugating carbon atoms; X1 is a dialkylamino group; and Y1 is a diarylamino group or an alkylarylamino group.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: April 29, 2008
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Sachiko Yamagata, Ryoji Nomura, Satoshi Seo
  • Publication number: 20070184304
    Abstract: A light-emitting compound that can be easily applied to vacuum vapor deposition and exhibit long wavelength light is disclosed. Further, a light-emitting element without inferior luminescence properties due to the carbonization of a light-emitting compound during vapor deposition; and a light-emitting device that is composed of the light-emitting elements are also disclosed. A pyran derivative is represented by the following general formula 1: wherein R1 is a hydrogen element or an alkoxy group.
    Type: Application
    Filed: April 4, 2007
    Publication date: August 9, 2007
    Inventors: Sachiko Yamagata, Hiroko Abe, Nobuharu Ohsawa, Ryoji Nomura, Satoshi Seo
  • Patent number: 7217465
    Abstract: A light-emitting compound that can be easily applied to vacuum vapor deposition and exhibit long wavelength light is disclosed. Further, a light-emitting element without inferior luminescence properties due to the carbonization of a light-emitting compound during vapor deposition; and a light-emitting device that is composed of the light-emitting elements are also disclosed. A pyran derivative is represented by the following general formula 1: wherein R1 is a hydrogen element or an alkoxy group.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: May 15, 2007
    Assignee: Semicondutor Energy Laboratory Co., Ltd.
    Inventors: Sachiko Yamagata, Hiroko Abe, Nobuharu Ohsawa, Ryoji Nomura, Satoshi Seo
  • Publication number: 20050260450
    Abstract: It is an object of the present invention to provide a luminescent material that has resistance to repeated oxidation reactions. Further, it is an object of the present invention to provide a light-emitting element that is high in luminous efficiency. Further, it is an object of the present invention to provide a light-emitting element that has a long life. An aspect of the present invention is an anthracene derivative represented by a general formula (1). In the general formula (1), R2 to R4 and R7 to R9 are individually any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a group represented by the following structure formula (2), and R1, R5, R6, and R10 are individually any one of hydrogen and an alkyl group having 1 to 4 carbon atoms.
    Type: Application
    Filed: May 2, 2005
    Publication date: November 24, 2005
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Sachiko Yamagata, Ryoji Nomura, Kumi Kojima, Satoshi Seo
  • Publication number: 20050089718
    Abstract: A light-emitting compound that can be easily applied to vacuum vapor deposition and exhibit long wavelength light is disclosed. Further, a light-emitting element without inferior luminescence properties due to the carbonization of a light-emitting compound during vapor deposition; and a light-emitting device that is composed of the light-emitting elements are also disclosed. A pyran derivative is represented by the following general formula 1: wherein R1 is a hydrogen element or an alkoxy group.
    Type: Application
    Filed: October 19, 2004
    Publication date: April 28, 2005
    Inventors: Sachiko Yamagata, Hiroko Abe, Nobuharu Ohsawa, Ryoji Nomura, Satoshi Seo
  • Publication number: 20050048315
    Abstract: A light-emitting compound that has excellent carrier transportation properties and that can exhibit long wavelength light is disclosed. Further, a method for manufacturing the light-emitting compound in a high yield is disclosed. The disclosed light-emitting compound is a pyran derivative as represented by general formula 1: wherein A1 and A2 are individually a ?-conjugated system group having 6 to 16 conjugating carbon atoms; X1 is a dialkylamino group; and Y1 is a diarylamino group or an alkylarylamino group.
    Type: Application
    Filed: August 13, 2004
    Publication date: March 3, 2005
    Inventors: Sachiko Yamagata, Ryoji Nomura, Satoshi Seo