Patents by Inventor Koh Fujimura

Koh Fujimura 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: 20130250394
    Abstract: Disclosed is an electrochromic display device including a display substrate, a display electrode provided on the display substrate, a first electrochromic layer provided on the display electrode, an intermediate display electrode provided above the first electrochromic layer separately from the first electrochromic layer, a second electrochromic layer provided on and contacting the intermediate display electrode, an opposed substrate, an opposed electrode provided on the opposed substrate, and an electrolyte solution provided between a surface of the display substrate on which the display electrode is formed and a surface of the opposed substrate on which the opposed electrode is formed, wherein the intermediate display electrode contains a rod-shaped, whisker-shaped, or long-fiber-shaped electrically conductive fine particle, and at least a portion of a space in the electrically conductive fine particle is filled with a material forming the second electrochromic layer.
    Type: Application
    Filed: March 22, 2013
    Publication date: September 26, 2013
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshinori Okada, Tohru Yashiro, Yoshihisa Naijo, Sukchan Kim, Shigenobu Hirano, Koh Fujimura, Hiroyuki Takahashi, Kazuaki Tsuji, Toshiya Sagisaka, Keiichiroh Yutani, Mamiko Inoue
  • Patent number: 8531754
    Abstract: An electrochromic display element including a display substrate, at least one display electrode, a counter electrode, a counter substrate, at least one electrochromic layer in contact with the display electrode, and an electrolyte layer between the electrochromic layer and the counter electrode, wherein the electrolyte layer contains a matrix resin having a three-dimensionally crosslinked structure and a mixture of a liquid crystal compound and an electrolyte, and wherein the mixture of the liquid crystal compound and the electrolyte is dispersed as a continuous phase in the matrix resin.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: September 10, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Koh Fujimura, Shigenobu Hirano, Tohru Yashiro, Yoshihisa Naijo
  • Patent number: 8384983
    Abstract: An electrochromic display device includes a display substrate, a counter substrate facing the display substrate, counter electrodes formed on the counter substrate, at least first and second display electrodes arranged between the display substrate and the counter electrodes, the first display electrode and the second display electrode having a predetermined distance from each other, a first electrochromic layer arranged on the first display electrode and a second electrochromic layer arranged on the second display electrode, an electrolyte layer arranged between the respective first and the second display electrodes and the counter electrodes, and a protective layer made of an insulator material formed on a counter electrode facing side surface of one of the first and the second display electrodes such that the protective layer is sandwiched between the selected one of the first and the second display electrodes and a corresponding one of the first and the second electrochromic layers.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: February 26, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Tohru Yashiro, Shigenobu Hirano, Yoshihisa Naijo, Koh Fujimura, Masahiro Yanagisawa, Masahiro Masuzawa, Hitoshi Arita
  • Publication number: 20120154892
    Abstract: An ion conductor includes a mixture including an electrolyte including a salt including inorganic or organic pairs of negative and positive ions, and a low-molecular liquid crystal material. Further, an impedance of the ion conductor varies in accordance with an increase of a voltage applied to the ion conductor due to an orientation response of the low-molecular liquid crystal material, the impedance being determined by an AC impedance method.
    Type: Application
    Filed: December 12, 2011
    Publication date: June 21, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tohru YASHIRO, Shigenobu Hirano, Koh Fujimura, Yoshihisa Naijo, Yoshinori Okada, Hiroyuki Takahashi, Akishige Murakami
  • Publication number: 20120139825
    Abstract: An electrochromic display device includes a display substrate, a counter substrate facing the display substrate, counter electrodes arranged on the counter substrate, an electrolyte layer arranged between the display substrate and the counter electrodes, display electrodes separately arranged from one another between the display substrate and the counter electrodes, electrochromic layers to develop or reduce a color by redox reactions, the electrochromic layers being formed on the respective display electrodes arranged such that the electrochromic layers face the set of the counter electrodes, a voltage applying unit to select one of the display electrodes to connect the selected display electrode and the counter electrodes to apply a voltage between the connected display electrode and counter electrodes, a disconnecting unit to disconnect the unselected display electrodes from the counter electrodes, and an interelectrode connecting unit to connect the display electrodes.
    Type: Application
    Filed: December 2, 2011
    Publication date: June 7, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tohru YASHIRO, Shigenobu Hirano, Yoshihisa Naijo, Koh Fujimura, Akishige Murakami, Hiroyuki Takahashi, Yoshinori Okada
  • Patent number: 8158020
    Abstract: A liquid crystal element comprising a pair of transparent substrates, a liquid crystal layer which fills in between the pair of substrates and can form a chiral smectic C phase in homeotropic orientation, and an electrode which generates, at least, an electric field (parallel electric field) in directions parallel to a principal face of the substrate for the liquid crystal layer is provided, wherein the liquid crystal layer comprises, at least, a chiral compound of the following general formula (1-I) or a chiral compound of the following general formula (2-I) and a chiral compound of the following general formula (2 -II) in a base liquid crystal material which can provide a phase sequence of an isotropic liquid phase, a nematic phase, a smectic A phase and a smectic C phase from a higher temperature side, wherein R1, A2, Z1, Z2, m and 1 in formula (1-I), X, R1, R2, and * in formula (2-I), and X, R3, R4, R5, and * in formula (2-II) are defined in the specification.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: April 17, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Yohei Takano, Hiroyuki Sugimoto, Toshiaki Tokita, Koh Fujimura, Yasuyuki Takiguchi, Yumi Matsuki, Haruki Amagawa, Toshiaki Nonaka
  • Publication number: 20120033286
    Abstract: An electrochromic display device includes a display substrate, a counter substrate facing the display substrate, counter electrodes formed on the counter substrate, at least first and second display electrodes arranged between the display substrate and the counter electrodes, the first display electrode and the second display electrode having a predetermined distance from each other, a first electrochromic layer arranged on the first display electrode and a second electrochromic layer arranged on the second display electrode, an electrolyte layer arranged between the respective first and the second display electrodes and the counter electrodes, and a protective layer made of an insulator material formed on a counter electrode facing side surface of one of the first and the second display electrodes such that the protective layer is sandwiched between the selected one of the first and the second display electrodes and a corresponding one of the first and the second electrochromic layers.
    Type: Application
    Filed: August 1, 2011
    Publication date: February 9, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tohru YASHIRO, Shigenobu Hirano, Yoshihisa Naijo, Koh Fujimura, Masahiro Yanagisawa, Masahiro Masuzawa, Hitoshi Arita
  • Publication number: 20110279884
    Abstract: An electrochromic display element including a display substrate, at least one display electrode, a counter electrode, a counter substrate, at least one electrochromic layer in contact with the display electrode, and an electrolyte layer between the electrochromic layer and the counter electrode, wherein the electrolyte layer contains a matrix resin having a three-dimensionally crosslinked structure and a mixture of a liquid crystal compound and an electrolyte, and wherein the mixture of the liquid crystal compound and the electrolyte is dispersed as a continuous phase in the matrix resin.
    Type: Application
    Filed: May 11, 2011
    Publication date: November 17, 2011
    Applicant: RICOH COMPANY, LTD.
    Inventors: Koh FUJIMURA, Shigenobu Hirano, Tohru Yashiro, Yoshihisa Naijo
  • Publication number: 20110222139
    Abstract: An electrochromic display apparatus is disclosed that includes a stacked body which includes a display electrode and an electrochromic layer that are stacked on each other; a film which includes through holes, and is disposed on one of the display electrode and the electrochromic layer of the stacked body; and an opposed substrate on which an opposed electrode that faces toward the display electrode is formed.
    Type: Application
    Filed: March 11, 2011
    Publication date: September 15, 2011
    Applicant: RICOH COMPANY, LTD.,
    Inventors: Yoshihisa NAIJO, Tohru Yashiro, Shigenobu Hirano, Masahiro Yanagisawa, Masahiro Masuzawa, Akishige Murakami, Hiroyuki Takahashi, Koh Fujimura, Yoshinori Okada
  • Patent number: 7929071
    Abstract: A disclosed electric field generating device includes an electric field generating unit including a substrate, line electrodes, and an electric field generating resistor and configured to generate an electric field. In the disclosed electric field generating device, the line electrodes are formed on at least one side of the substrate in parallel with each other so as to divide the side of the substrate into multiple sections; the electric field generating resistor is shaped like a strip and positioned so as to touch a part of each of the line electrodes; and some of the line electrodes have connectors for electric connection.
    Type: Grant
    Filed: March 12, 2007
    Date of Patent: April 19, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukiko Hirano, Toshiaki Tokita, Koh Fujimura, Yumi Matsuki, Toshimichi Hagiya, Takanobu Osaka, Masanori Kobayashi, Yohei Takano
  • Patent number: 7902680
    Abstract: A layered structure comprises a variable wettability layer including a material that changes a critical surface tension in response to energy provided thereto, the wettability changing layer including at least a high surface energy part of large critical surface tension and a low surface energy part of low critical surface tension, a conductive layer formed on the variable wettability layer at the high surface energy tension part, and a semiconductor layer formed on the variable wettability layer at the low surface energy part.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: March 8, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Takanori Tano, Koh Fujimura, Hidenori Tomono, Hitoshi Kondoh
  • Publication number: 20100078642
    Abstract: A layered structure comprises a variable wettability layer including a material that changes a critical surface tension in response to energy provided thereto, the wettability changing layer including at least a high surface energy part of large critical surface tension and a low surface energy part of low critical surface tension, a conductive layer formed on the variable wettability layer at the high surface energy tension part, and a semiconductor layer formed on the variable wettability layer at the low surface energy part.
    Type: Application
    Filed: August 26, 2009
    Publication date: April 1, 2010
    Inventors: Takanori TANO, Koh Fujimura, Hidenori Tomono, Hitoshi Kondoh
  • Patent number: 7612455
    Abstract: A layered structure comprises a variable wettability layer including a material that changes a critical surface tension in response to energy provided thereto, the wettability changing layer including at least a high surface energy part of large critical surface tension and a low surface energy part of low critical surface tension, a conductive layer formed on the variable wettability layer at the high surface energy tension part, and a semiconductor layer formed on the variable wettability layer at the low surface energy part.
    Type: Grant
    Filed: June 1, 2004
    Date of Patent: November 3, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Takanori Tano, Koh Fujimura, Hidenori Tomono, Hitoshi Kondoh
  • Patent number: 7489383
    Abstract: An optical axis deflecting element is provided with a pair of transparent substrates, a liquid crystal layer disposed between substrate surfaces of the pair of transparent substrates and having a chiral smectic C-phase forming a homeotropic orientation, and a plurality of electrode pairs each defining one of a plurality of divided regions into which an effective region of the liquid crystal layer is divided, wherein an electric field is independently applicable to each divided region defined by a corresponding electrode pair in a direction parallel to the substrate surfaces.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: February 10, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroyuki Sugimoto, Yumi Matsuki, Yukiko Hirano, Kenji Namie, Toshiaki Tokita, Takanobu Osaka, Koh Fujimura
  • Publication number: 20080204608
    Abstract: A liquid crystal element comprising a pair of transparent substrates, a liquid crystal layer which fills in between the pair of substrates and can form a chiral smectic C phase in homeotropic orientation, and an electrode which generates, at least, an electric field (parallel electric field) in directions parallel to a principal face of the substrate for the liquid crystal layer is provided, wherein the liquid crystal layer comprises, at least, a chiral compound of the following general formula (1-I) or a chiral compound of the following general formula (2-I) and a chiral compound of the following general formula (2-II) in a base liquid crystal material which can provide a phase sequence of an isotropic liquid phase, a nematic phase, a smectic A phase and a smectic C phase from a higher temperature side, wherein R1, A2, Z1, Z2, m and I in formula (1-I), X, R1, R2, and * in formula (2-I), and X, R3, R4, R5, and * in formula (2-II) are defined in the specification.
    Type: Application
    Filed: March 1, 2007
    Publication date: August 28, 2008
    Inventors: Yohei Takano, Hiroyuki Sugimoto, Toshiaki Tokita, Koh Fujimura, Yasuyuki Takiguchi, Yumi Matsuki, Haruki Amagawa, Toshiaki Nonaka
  • Publication number: 20070216316
    Abstract: A disclosed electric field generating device includes an electric field generating unit including a substrate, line electrodes, and an electric field generating resistor and configured to generate an electric field. In the disclosed electric field generating device, the line electrodes are formed on at least one side of the substrate in parallel with each other so as to divide the side of the substrate into multiple sections; the electric field generating resistor is shaped like a strip and positioned so as to touch a part of each of the line electrodes; and some of the line electrodes have connectors for electric connection.
    Type: Application
    Filed: March 12, 2007
    Publication date: September 20, 2007
    Inventors: Yukiko HIRANO, Toshiaki Tokita, Koh Fujimura, Yumi Matsuki, Toshimichi Hagiya, Takanobu Osaka, Masanori Kobayashi, Yohei Takano
  • Publication number: 20060250543
    Abstract: An optical axis deflecting element is provided with a pair of transparent substrates, a liquid crystal layer disposed between substrate surfaces of the pair of transparent substrates and having a chiral smectic C-phase forming a homeotropic orientation, and a plurality of electrode pairs each defining one of a plurality of divided regions into which an effective region of the liquid crystal layer is divided, wherein an electric field is independently applicable to each divided region defined by a corresponding electrode pair in a direction parallel to the substrate surfaces.
    Type: Application
    Filed: April 24, 2006
    Publication date: November 9, 2006
    Inventors: Hiroyuki Sugimoto, Yumi Matsuki, Yukiko Hirano, Kenji Namie, Toshiaki Tokita, Takanobu Osaka, Koh Fujimura
  • Publication number: 20060124925
    Abstract: An electron device includes at least an electrode layer, a semiconductor layer and an insulator layer laminated on a substrate, wherein the insulator layer contains a polyimide material obtained by using at least one of a polyamic acid and derivatives of the polyamic acid, the polyamic acid being obtained by reacting one or more of tetracarbonic acid dianhydride compounds selected from the group consisting of a tetracarbonic anhydride and derivatives of the tetracarbonic anhydride, with a diamine compound, the tetracarbonic dianhydride compound containing one or more components of tetracarbonic dianhydride compound selected from a specific group of tetracarbonic acid dianhydrides and the derivatives thereof.
    Type: Application
    Filed: November 28, 2005
    Publication date: June 15, 2006
    Inventors: Hiroshi Kondo, Hitoshi Kondoh, Hidenori Tomono, Koh Fujimura, Takanori Tano, Yukio Hirano, Noriaki Narita
  • Publication number: 20040238816
    Abstract: A layered structure comprises a variable wettability layer including a material that changes a critical surface tension in response to energy provided thereto, the wettability changing layer including at least a high surface energy part of large critical surface tension and a low surface energy part of low critical surface tension, a conductive layer formed on the variable wettability layer at the high surface energy tension part, and a semiconductor layer formed on the variable wettability layer at the low surface energy part.
    Type: Application
    Filed: June 1, 2004
    Publication date: December 2, 2004
    Inventors: Takanori Tano, Koh Fujimura, Hidenori Tomono, Hitoshi Kondoh
  • Patent number: 5184239
    Abstract: A sealing structure of a liquid crystal injection holes in a liquid crystal display device, capable of injecting the liquid crystal from a plurality of liquid crystal injection holes into the inside of a liquid crystal cell enclosed by a sealant. The sealing structure of the liquid crystal injection holes is constructed so that each liquid crystal injection holes is linked by a drain of a sealant one to another, and the sealant has an opening portion which connects the inside of the cell with the outside, thus, making it possible to seal all the injection holes by filling the aforementioned drain with the sealing agent which is injected from one of the injection holes.
    Type: Grant
    Filed: August 9, 1991
    Date of Patent: February 2, 1993
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuyoshi Sano, Koh Fujimura, Takumi Suzuki, Takashi Tsutsui