Patents by Inventor Satomi Kawabe

Satomi Kawabe 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: 10797248
    Abstract: An object of the present invention is to provide an organic EL element which has a shorter maximum luminescent wavelength, a long luminous lifespan, a low driving voltage, a small time-dependent change in driving voltage, and a small change in external extraction quantum efficiency even when being used at a high temperature. In addition, an object of the present invention is to provide a lighting device and a display device including the organic EL element.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: October 6, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Satomi Kawabe, Motoaki Sugino, Shinya Otsu
  • Publication number: 20190280216
    Abstract: Provided are an organic electroluminescent element having a long lifetime and preventing a voltage rise and a decrease in efficiency after driven for a long time, a display and a lighting device both of which include the element. The organic electroluminescent element includes a luminescent layer sandwiched between an anode and a cathode, and a plurality of organic layers including the luminescent layer. The luminescent layer contains a phosphorescent compound and host compounds A and B both of which satisfy the following equations and requirement (11). Host Compound A=X+nR1, Host Compound B=X+mR2; and (11) [HOMO Energy level of Host Compound A]?[HOMO Energy level of Host Compound B]?0.15 eV.
    Type: Application
    Filed: April 6, 2017
    Publication date: September 12, 2019
    Inventors: Satomi KAWABE, Kunio TANI, Hiroto ITO
  • Publication number: 20160315273
    Abstract: An object of the present invention is to provide an organic EL element which has a shorter maximum luminescent wavelength, a long luminous lifespan, a low driving voltage, a small time-dependent change in driving voltage, and a small change in external extraction quantum efficiency even when being used at a high temperature. In addition, an object of the present invention is to provide a lighting device and a display device including the organic EL element.
    Type: Application
    Filed: December 2, 2014
    Publication date: October 27, 2016
    Inventors: Satomi KAWABE, Motoaki SUGINO, Shinya OTSU
  • Publication number: 20150072159
    Abstract: Provided is a conductive film with excellent transparency, conductivity, and film strength and in which there is minimal degradation of the transparency, conductivity, and film strength even in a high temperature and high humidity environment. A conductive film is provided with a base material and an organic compound layer that is conductive and is formed on top of the base material. The conductive film is characterized by the organic compound layer including a conductive polymer compound containing a cationic ? conjugated system conductive polymer and a polyanion, and a polyolefin copolymer.
    Type: Application
    Filed: March 29, 2013
    Publication date: March 12, 2015
    Inventors: Kazuaki Nakamura, Satomi Kawabe, Takayuki Suzuki
  • Publication number: 20120298007
    Abstract: A process for producing a cellulose ester film that is produced by a melt casting method using no solvent at film formation, and that attains reduction of bright spot foreign matter, excelling in planarity, and that attains reduction of staining, excelling in dimensional stability. It is also intended to provide such a cellulose ester film, a polarizing plate and a liquid crystal display unit. There is provided a process for producing a cellulose ester film, characterized by forming into a film a material containing a cellulose ester and an ester compound of 1 to 7.5 distribution coefficient obtained by condensation of a polyhydric alcohol and an organic acid of the general formula: (1) according to a melt casting method.
    Type: Application
    Filed: November 29, 2011
    Publication date: November 29, 2012
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Satomi Kawabe, Kazuto Kiyohara, Akihiko Takeda, Takayuki Suzuki, Kazuaki Nakamura, Takashi Konishi
  • Patent number: 8246880
    Abstract: Disclosed is a method for producing a cellulose ester film wherein a film-forming material containing the following components A-C is heated and melted, and a cellulose ester film is formed therefrom by melt-casting. A: a cellulose resin, B: an ester compound obtained by condensing an organic acid represented by Formula (1) and a polyalcohol, and C: an aliphatic polyester or an aliphatic-aromatic copolymer.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: August 21, 2012
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Satomi Kawabe, Kazuto Kiyohara, Kunio Shimizu, Isamu Michihata, Akihiko Takeda, Kazuaki Nakamura
  • Patent number: 8236208
    Abstract: An optical cellulose ester film comprising a cellulose ester (A); at least one ester based plasticizer (B) selected from ester based plasticizers composed of a polyhydric alcohol and a univalent carboxylic acid, or ester based plasticizers composed of a polyvalent carboxylic acid and a monohydric alcohol; at least one stabilizer (C) selected from the group consisting of a phenol based stabilizer, a hindered amine based stabilizer, or a phosphorous based stabilizer; and a hydrogen bonding solvent (D).
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: August 7, 2012
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Akihiko Takeda, Kazuto Kiyohara, Satomi Kawabe, Yasuki Nagai, Takayuki Suzuki, Kazuaki Nakamura, Takashi Konishi
  • Patent number: 7854971
    Abstract: A cellulose ester film comprising a cellulose ester and a compound containing: an acrylate group or a methacrylate group; and a phenolic hydroxyl group, in the molecule.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: December 21, 2010
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Kenzo Kasahara, Satomi Kawabe, Koichi Saito, Kazuaki Nakamura, Rumiko Yamada
  • Patent number: 7820255
    Abstract: A transparent film for display substrate containing a cellulose ester, a plasticizer content in an amount of less than 1 percent, the aforementioned film being drawn 3 through 100 percent both in the direction of conveyance and across the width.
    Type: Grant
    Filed: May 12, 2004
    Date of Patent: October 26, 2010
    Assignee: Konica Minolta Holdings, Inc.
    Inventors: Yasushi Okubo, Kazuto Kiyohara, Satomi Kawabe
  • Publication number: 20100236713
    Abstract: A film for a display comprising a cellulose ester and a compound represented by Formula (I) or (Ia).
    Type: Application
    Filed: March 5, 2010
    Publication date: September 23, 2010
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Satomi Kawabe, Koichi Saito, Takatugu Suzuki, Kazuaki Nakamura, Kenzo Kasahara, Rumiko Yamada, Issei Nakahara
  • Publication number: 20100164141
    Abstract: Disclosed is a cellulose ester film comprising cellulose ester and a phosphonite compound.
    Type: Application
    Filed: March 8, 2010
    Publication date: July 1, 2010
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Norio MIURA, Satomi KAWABE, Takayuki SUZUKI, Kazuaki NAKAMURA
  • Publication number: 20100151156
    Abstract: Disclosed is a method for producing a cellulose ester film wherein a film-forming material containing the following components A-C is heated and melted, and a cellulose ester film is formed therefrom by melt-casting. A: a cellulose resin, B: an ester compound obtained by condensing an organic acid represented by Formula (1) and a polyalcohol, and C: an aliphatic polyester or an aliphatic-aromatic copolymer.
    Type: Application
    Filed: September 29, 2006
    Publication date: June 17, 2010
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Satomi Kawabe, Kazuto Kiyohara, Kunio Shimizu, Isamu Michihata, Akihiko Takeda, Kazuaki Nakamura
  • Publication number: 20100104775
    Abstract: Disclosed is an ultraviolet absorbing polymer which is characterized by being derived from an ethylenically unsaturated monomer having a partial structure represented by Formula (A) below in a molecule, and a monomer represented by Formula (B) below:
    Type: Application
    Filed: March 28, 2008
    Publication date: April 29, 2010
    Inventors: Takayuki Suzuki, Ryohei Iwamoto, Satomi Kawabe, Takatugu Suzuki, Issei Nakahara
  • Publication number: 20100103352
    Abstract: Disclosed is an optical film which is characterized by containing an ultraviolet absorbing polymer which is derived from at least two monomers, namely an ethylenically unsaturated monomer having a partial structure represented by Formula (A) below in a molecule, and a monomer represented by Formula (B) below:
    Type: Application
    Filed: March 28, 2008
    Publication date: April 29, 2010
    Inventors: Takayuki Suzuki, Ryohei Iwamoto, Satomi Kawabe, Takatugu Suzuki, Issei Nakahara
  • Publication number: 20090306361
    Abstract: A process for producing a cellulose ester film that is produced by a melt casting method using no solvent at film formation, and that attains reduction of bright spot foreign matter, excelling in planarity, and that attains reduction of staining, excelling in dimensional stability. It is also intended to provide such a cellulose ester film, a polarizing plate and a liquid crystal display unit. There is provided a process for producing a cellulose ester film, characterized by forming into a film a material containing a cellulose ester and an ester compound of 1 to 7.5 distribution coefficient obtained by condensation of a polyhydric alcohol and an organic acid of the general formula: (1) according to a melt casting method.
    Type: Application
    Filed: December 4, 2006
    Publication date: December 10, 2009
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Satomi Kawabe, Kazuto Kiyohara, Akihiko Takeda, Takayuki Suzuki, Kazuaki Nakamura, Takashi Konishi
  • Publication number: 20090246416
    Abstract: In the present invention, provided is an optical film exhibiting less generation of horseback failure, winding core transfer and wrinkles on a film when starting winding, and also provided is a manufacturing method thereof, further together with a polarizing plate and a liquid crystal display device exhibiting high contrast. Also disclosed is an optical film possessing a cellulose ester and a UV absorbent represented by the following Formula (1): wherein R1 represents R2 represents a methyl group, a t-butyl group, a t-amyl group or a t-octyl group; R3 represents a substituent; each of R4 and R5 represents a hydrogen atom or a substituent; m is an integer of 0-3; and n is an integer of 0-4.
    Type: Application
    Filed: July 5, 2007
    Publication date: October 1, 2009
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Satomi Kawabe, Koichi Saito, Rumiko Yamada
  • Publication number: 20090226641
    Abstract: A composition for melt casting film formation that excels in not only uniformity of retardation being an optical characteristic, especially uniformity of retardation in the direction of film width, but also contrast; and relevant thereto, an optical film, process for producing the optical film, polarization plate and liquid crystal display apparatus. Accordingly, there is provided a composition for melt casting film formation containing a cellulose ester in an amount of 50 mass % or more, characterized in that the free acid content of the composition is 50 ppm or less.
    Type: Application
    Filed: November 25, 2006
    Publication date: September 10, 2009
    Inventors: Kazuaki Nakamura, Kazuto Kiyohara, Norio Miura, Satomi Kawabe, Akihiko Takeda, Takayuki Suzuki, Takashi Konishi
  • Patent number: 7569259
    Abstract: A plasticizer comprising an ester compound produced by a condensation reaction of an organic acid represented by Formula (1) with a polyhydric alcohol having at least 3 hydroxyl groups in the molecule,
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: August 4, 2009
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Yasushi Okubo, Kazuto Kiyohara, Satomi Kawabe, Akihiko Takeda, Takayuki Suzuki, Kazuaki Nakamura
  • Publication number: 20090185112
    Abstract: A protective film for polarizers which comprises a cellulose ester film and which, even when stored for long, suffers no film deformation failures such as ridging and protrusion failures; a process for producing the protective film; a polarizer; a process for producing the polarizer; and a liquid-crystal display employing the polarizer. The process for producing a protective film for polarizers is characterized by forming a melt comprising a cellulose ester and at least one member selected among compounds respectively represented by the following general formulae (1) to (3) into a continuous cellulose ester film by melt casting and winding the film into a roll. [Chemical formula 1] General formula (1) (In the formula, R1 to R5 each represents a substituent.) [Chemical formula 2] General formula (2) (In the formula, R1 to R6 each represents a substituent.
    Type: Application
    Filed: May 21, 2007
    Publication date: July 23, 2009
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Satomi Kawabe, Kazuaki Nakamura
  • Publication number: 20090155495
    Abstract: A process for cellulose acylate film production which is sufficiently effective in reducing viscosity and in reducing moisture permeability. The cellulose acylate film does not suffer bleeding, i.e., the phenomenon in which a component separates out or volatilizes from the cellulose acylate film, has high flatness, is inhibited from having streak unevenness, and has high evenness. Even through long-term storage, the film does not suffer film deformation failures such as ridge failures or protrusion failures. This process for cellulose acylate film production comprises forming a cellulose acylate film by the melt casting method, and is characterized in that the cellulose acylate film contains at least one compound represented by the following general formula (1) and that the cellulose acylate film extruded from a casting dye in the film formation by melt casting is pressed between a touch roll having an elastically deformable surface and a cooling roll to produce the target film.
    Type: Application
    Filed: April 16, 2007
    Publication date: June 18, 2009
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Takayuki Suzuki, Satomi Kawabe