Patents by Inventor Hajime Yokoi

Hajime Yokoi 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: 8124185
    Abstract: A method for manufacturing an organic functional layer includes the steps of: forming a coated film of an organic functional material by applying a coating liquid to a substrate by a printing method, the coating liquid including an organic functional material dissolved or dispersed in a first organic solvent; and bringing the coated film into contact with vapor or liquid of a second organic solvent, the second organic solvent having the following properties: chemically non-active; the second organic solvent can be mixed with the first solvent; the second organic solvent can not substantially dissolve the organic functional material; and a vapor pressure of the second organic solvent is higher than that of the first organic solvent at a room temperature.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: February 28, 2012
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Hajime Yokoi, Yuko Abe, Ryo Shoda, Eiichi Kitazume
  • Patent number: 7977866
    Abstract: According to the present invention a method of manufacturing an organic electroluminescence element and a display device is provided, wherein the method includes forming an organic light emitting medium layer inside a pixel sectioned by a partition wall, wherein an out gas from a partition wall is small, thereby damage to an organic light emitting medium layer is controlled, and wherein, in an organic electroluminescence element, there is no defect and no unevenness because a uniform film is formed without ink-repellent phenomenon on an organic light emitting medium layer.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: July 12, 2011
    Assignee: Toppan Printing Co., Ltd
    Inventors: Ryo Shoda, Eiichi Kitazume, Hajime Yokoi, Koji Murata, Yuko Abe
  • Publication number: 20090074974
    Abstract: A method for manufacturing an organic functional layer includes the steps of: forming a coated film of an organic functional material by applying a coating liquid to a substrate by a printing method, the coating liquid including an organic functional material dissolved or dispersed in a first organic solvent; and bringing the coated film into contact with vapor or liquid of a second organic solvent, the second organic solvent having the following properties: chemically non-active; the second organic solvent can be mixed with the first solvent; the second organic solvent can not substantially dissolve the organic functional material; and a vapor pressure of the second organic solvent is higher than that of the first organic solvent at a room temperature.
    Type: Application
    Filed: September 16, 2008
    Publication date: March 19, 2009
    Applicant: Toppan Printing Co.
    Inventors: Hajime Yokoi, Yuko Abe, Ryo Shoda, Eiichi Katazume
  • Publication number: 20080124574
    Abstract: According to the present invention a method of manufacturing an organic electroluminescence element and a display device is provided, wherein the method includes forming an organic light emitting medium layer inside a pixel sectioned by a partition wall, wherein an out gas from a partition wall is small, thereby damage to an organic light emitting medium layer is controlled, and wherein, in an organic electroluminescence element, there is no defect and no unevenness because a uniform film is formed without ink-repellent phenomenon on an organic light emitting medium layer.
    Type: Application
    Filed: November 21, 2007
    Publication date: May 29, 2008
    Applicant: Toppan Printing Co., Ltd.
    Inventors: Ryo Shoda, Eiichi Kitazume, Hajime Yokoi, Koji Murata, Yuko Abe
  • Publication number: 20070278945
    Abstract: The present invention provides an organic EL device, which is long-life and has high performance, by optimizing the hole transport layer. An organic electroluminescence device including at least a first electrode 102, an organic electroluminescence medium layer 103 having a hole transport layer 103a and an organic luminescent layer 103b, and a second electrode 104 in this order, wherein the hole transport layer 103a includes associates of a donating molecule and an accepting molecule, and the hole transport layer 103a has different component ratios of the donating molecule and the accepting molecule between the side of the first electrode 102 and the side of the organic luminescent layer 103b.
    Type: Application
    Filed: January 25, 2007
    Publication date: December 6, 2007
    Inventors: Yuko Abe, Eiichi Kitazume, Hajime Yokoi, Ryo Shoda
  • Publication number: 20070210705
    Abstract: One embodiment of the present invention is an organic electroluminescent element including a first electrode, a second electrode, an organic luminescent medium layer including an organic luminescent layer and one or more other layer, wherein the first electrode faces the second electrode, wherein the organic luminescent medium layer is between the first electrode and the second electrode, and wherein an inorganic barrier layer is between the organic luminescent medium layer.
    Type: Application
    Filed: January 24, 2007
    Publication date: September 13, 2007
    Inventors: Hajime Yokoi, Ryo Shoda, Yuko Abe, Eiichi Kitazume
  • Publication number: 20070209303
    Abstract: An organic electroluminescence device is provided including a luminescent medium layer, wherein the luminescence medium layer includes plural layers, wherein the plural layers includes a low molecular material layer comprising low molecular material and a high molecular material layer comprising high molecular material, and wherein at least one low molecular material layer is directly formed on at least one high molecular materials layer.
    Type: Application
    Filed: November 10, 2006
    Publication date: September 13, 2007
    Inventors: Ryo Shoda, Eiichi Kitazume, Hajime Yokoi, Yuko Abe
  • Patent number: 6936189
    Abstract: A cyclic tertiary amine compound represented by a formula (1) and an organic luminescent device are disclosed. Use of the cyclic tertiary amine compound as a hole transport material, a hole injection material or an organic electroluminescent material can provide organic EL devices having high luminous efficiency and a long service life.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: August 30, 2005
    Assignee: Chisso Corporation
    Inventors: Wang Guofang, Manabu Uchida, Hajime Yokoi, Takaharu Nakano, Kenji Furukawa
  • Publication number: 20040170866
    Abstract: The present invention relates to a cyclic tertiary amine compound represented by a formula (1) and an organic luminescent device.
    Type: Application
    Filed: March 4, 2004
    Publication date: September 2, 2004
    Inventors: Wang Guofang, Manabu Uchida, Hajime Yokoi, Takaharu Nakano, Kenji Furukawa
  • Patent number: 6761981
    Abstract: A cyclic tertiary amine compound represented by a formula (1) and an organic luminescent device are disclosed. Use of the cyclic tertiary amine compound as a hole transport material, a hole injection material or an organic electroluminescent material can provide organic EL devices having high luminous efficiency and a long service life.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: July 13, 2004
    Assignee: Chisso Corporation
    Inventors: Wang Guofang, Manabu Uchida, Hajime Yokoi, Takaharu Nakano, Kenji Furukawa
  • Publication number: 20020058155
    Abstract: The present invention relates to a cyclic tertiary amine compound represented by a formula (1) and an organic luminescent device.
    Type: Application
    Filed: September 26, 2001
    Publication date: May 16, 2002
    Inventors: Wang Guofang, Manabu Uchida, Hajime Yokoi, Takaharu Nakano, Kenji Furukawa