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).

  • Patent number: 11474408
    Abstract: An electronic device includes electrode layers and supports. The electrode layers and supports include an electrode layer and a support on each of both sides of an electronic functional layer in a thickness direction. Taking-out electrode parts from the electrode layers are exposed in a plane region of at least one of the supports on the both sides.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: October 18, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yasuhiro Takahashi, Keiichiroh Yutani, Tohru Yashiro, Tomoo Fukuda, Kohji Takeuchi, Tohru Hasegawa, Koh Fujimura, Takashi Tsutsui
  • Patent number: 11237447
    Abstract: An electrochromic element is provided that includes a first substrate and a second substrate that are arranged to oppose each other, a first transparent electrode that is formed on a surface of the first substrate facing the second substrate, a second transparent electrode that is formed on a surface of the second substrate facing the first substrate, and a coloration layer that is arranged between the first transparent electrode and the second transparent electrode. The coloration layer includes an electrochromic material and an electrolyte, and a pattern or a concentration gradient of the electrochromic material is formed in at least a part of the coloration layer.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: February 1, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Keiichiroh Yutani, Tomoo Fukuda, Hiroyuki Takahashi, Koh Fujimura, Tohru Yashiro, Takaaki Konno, Noboru Sasa
  • Patent number: 11209713
    Abstract: To provide an electrochromic element, which contains: a first electrode; a second electrode; and an electrolyte provided between the first electrode and the second electrode, wherein the first electrode contains a polymer product obtained through polymerization of an electrochromic composition where the electrochromic composition contains a radical polymerizable compound containing triarylamine.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: December 28, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Satoshi Yamamoto, Kazukiyo Nagai, Tamotsu Horiuchi, Keiichiroh Yutani, Sukchan Kim, Yoshinori Okada, Hiroyuki Takahashi, Koh Fujimura, Yoshihisa Naijo, Kazuaki Tsuji, Shigenobu Hirano, Toshiya Sagisaka, Daisuke Goto, Keigo Takauji, Mamiko Inoue, Tohru Yashiro
  • Patent number: 11053267
    Abstract: To provide an electrochromic compound, represented by the following general formula (I): where X1, X2, X3, X4, X5, X6, X7 and X8 are each independently a hydrogen atom or a monovalent substituent; R1 and R2 are each independently a monovalent substituent; A? and B? are each independently a monovalent anion; and Y is represented by the following general formula (II) or (III): where X9, X10, X11, X12, X13, X14, X15, X16, X17, and X18 are each independently a hydrogen atom or a monovalent substituent.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: July 6, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshiya Sagisaka, Hiroyuki Takahashi, Takashi Okada, Shigenobu Hirano, Tohru Yashiro, Koh Fujimura, Yoshihisa Naijo, Yoshinori Okada, Kazuaki Tsuji, Sukchan Kim, Keiichiroh Yutani, Tamotsu Horiuchi, Mamiko Inoue
  • Publication number: 20200301227
    Abstract: An electronic device includes electrode layers and supports. The electrode layers and supports include an electrode layer and a support on each of both sides of an electronic functional layer in a thickness direction. Taking-out electrode parts from the electrode layers are exposed in a plane region of at least one of the supports on the both sides.
    Type: Application
    Filed: March 17, 2020
    Publication date: September 24, 2020
    Inventors: Yasuhiro TAKAHASHI, Keiichiroh YUTANI, Tohru YASHIRO, Tomoo FUKUDA, Kohji TAKEUCHI, Tohru HASEGAWA, Koh FUJIMURA, Takashi TSUTSUI
  • Publication number: 20200216478
    Abstract: To provide an electrochromic compound, represented by the following general formula (I): where X1, X2, X3, X4, X5, X6, X7 and X8 are each independently a hydrogen atom or a monovalent substituent; R1 and R2 are each independently a monovalent substituent; A? and B? are each independently a monovalent anion; and Y is represented by the following general formula (II) or (III): where X9, X10, X11, X12, X13, X14, X15, X16, X17, and X18 are each independently a hydrogen atom or a monovalent substituent.
    Type: Application
    Filed: March 16, 2020
    Publication date: July 9, 2020
    Inventors: Toshiya SAGISAKA, Hiroyuki TAKAHASHI, Takashi OKADA, Shigenobu HIRANO, Tohru YASHIRO, Koh FUJIMURA, Yoshihisa NAIJO, Yoshinori OKADA, Kazuaki TSUJI, Sukchan KIM, Keiichiroh YUTANI, Tamotsu HORIUCHI, Mamiko INOUE
  • Patent number: 10626133
    Abstract: To provide an electrochromic compound, represented by the following general formula where X1, X2, X3, X4, X5, X6, X7 and X8 are each independently a hydrogen atom or a monovalent substituent; R1 and R2 are each independently a monovalent substituent; A? and B? are each independently a monovalent anion; and Y is represented by the following general formula (II) or (III): where X9, X10, X11, X12, X13, X14, X15, X16, X17, and X18 are each independently a hydrogen atom or a monovalent substituent.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: April 21, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshiya Sagisaka, Hiroyuki Takahashi, Takashi Okada, Shigenobu Hirano, Tohru Yashiro, Koh Fujimura, Yoshihisa Naijo, Yoshinori Okada, Kazuaki Tsuji, Sukchan Kim, Keiichiroh Yutani, Tamotsu Horiuchi, Mamiko Inoue
  • Patent number: 10527905
    Abstract: An electrochromic element includes first and second display electrodes arranged at intervals and opposed to each other, at least one of the first and second display electrodes being transparent; an electrolyte provided between the first and second display electrodes; a first electrochromic layer including at least one of an oxidized electrochromic compound and an oxidized electrochromic composition, and contacting the first display electrode and the electrolyte; a second electrochromic layer including at least one of a reduced electrochromic compound and a reduced electrochromic composition, and contacting the second display electrode and the electrolyte; third and fourth auxiliary electrodes contacting the electrolyte; a reduction layer provided on the third auxiliary electrode and including a reductant of a first material; and an oxidation layer provided on the fourth auxiliary electrode and including an oxidant of a second material. The first and second materials can be oxidized and reduced reversibly.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: January 7, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Fuminari Kaneko, Koh Fujimura, Hidekazu Yaginuma, Keiichiroh Yutani, Takahiko Matsumoto, Mamiko Inoue, Tohru Yashiro
  • Publication number: 20190227401
    Abstract: An electrochromic element is provided that includes a first substrate and a second substrate that are arranged to oppose each other, a first transparent electrode that is formed on a surface of the first substrate facing the second substrate, a second transparent electrode that is formed on a surface of the second substrate facing the first substrate, and a coloration layer that is arranged between the first transparent electrode and the second transparent electrode. The coloration layer includes an electrochromic material and an electrolyte, and a pattern or a concentration gradient of the electrochromic material is formed in at least a part of the coloration layer.
    Type: Application
    Filed: January 17, 2019
    Publication date: July 25, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Keiichiroh YUTANI, Tomoo FUKUDA, Hiroyuki TAKAHASHI, Koh FUJIMURA, Tohru YASHIRO, Takaaki KONNO, Noboru SASA
  • Publication number: 20190031694
    Abstract: To provide an electrochromic compound, represented by the following general formula where X1, X2, X3, X4, X5, X6, X7 and X8 are each independently a hydrogen atom or a monovalent substituent; R1 and R2 are each independently a monovalent substituent; A? and B? are each independently a monovalent anion; and Y is represented by the following general formula (II) or (III): where X9, X10, X11, X12, X13, X14, X15, X16, X17, and X18 are each independently a hydrogen atom or a monovalent substituent.
    Type: Application
    Filed: September 5, 2018
    Publication date: January 31, 2019
    Inventors: Toshiya SAGISAKA, Hiroyuki TAKAHASHI, Takashi OKADA, Shigenobu HIRANO, Tohru YASHIRO, Koh FUJIMURA, Yoshihisa NAIJO, Yoshinori OKADA, Kazuaki TSUJI, Sukchan KIM, Keiichiroh YUTANI, Tamotsu HORIUCHI, Mamiko INOUE
  • Patent number: 10093693
    Abstract: To provide an electrochromic compound, represented by the following general formula (I): General Formula (I) where X1, X2, X3, X4, X5, X6, X7 and X8 are each independently a hydrogen atom or a monovalent substituent; R1 and R2 are each independently a monovalent substituent; A? and B? are each independently a monovalent anion; and Y is represented by the following general formula (II) or (III): General Formula (II) General Formula (III) where X9, X10, X11, X12, X13, X14, X15, X16, X17, and X18 are each independently a hydrogen atom or a monovalent substituent.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: October 9, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshiya Sagisaka, Hiroyuki Takahashi, Takashi Okada, Shigenobu Hirano, Tohru Yashiro, Koh Fujimura, Yoshihisa Naijo, Yoshinori Okada, Kazuaki Tsuji, Sukchan Kim, Keiichiroh Yutani, Tamotsu Horiuchi, Mamiko Inoue
  • Publication number: 20180113366
    Abstract: An electrochromic element includes first and second display electrodes arranged at intervals and opposed to each other, at least one of the first and second display electrodes being transparent; an electrolyte provided between the first and second display electrodes; a first electrochromic layer including at least one of an oxidized electrochromic compound and an oxidized electrochromic composition, and contacting the first display electrode and the electrolyte; a second electrochromic layer including at least one of a reduced electrochromic compound and a reduced electrochromic composition, and contacting the second display electrode and the electrolyte; third and fourth auxiliary electrodes contacting the electrolyte; a reduction layer provided on the third auxiliary electrode and including a reductant of a first material; and an oxidation layer provided on the fourth auxiliary electrode and including an oxidant of a second material. The first and second materials can be oxidized and reduced reversibly.
    Type: Application
    Filed: May 12, 2016
    Publication date: April 26, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Fuminari KANEKO, Koh FUJIMURA, Hidekazu YAGINUMA, Keiichiroh YUTANI, Takahiko MATSUMOTO, Mamiko INOUE, Tohru YASHIRO
  • Patent number: 9932522
    Abstract: To provide an electrochromic compound, represented by the following general formula (I), where Ar1 is a pyridinium ring having a structure represented by the following general formula (IIa), (IIb), or (IIc), where Ar2 is a monovalent heterocyclic ring which may have a substituent, but Ar2 is not a pyridinium ring; R1 to R8 are each independently a monovalent group which may have a functional group, where the monovalent group may have a substituent; A is a monovalent group which may have a functional group, where the monovalent group may have a substituent; and B? is a monovalent anion.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: April 3, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Goto, Toshiya Sagisaka, Shigenobu Hirano, Satoshi Yamamoto, Mamiko Inoue, Tohru Yashiro, Hiroyuki Takahashi, Koh Fujimura, Tamotsu Horiuchi, Keiichiroh Yutani, Yoshihisa Naijo, Yoshinori Okada, Kazuaki Tsuji, Sukchan Kim, Keigo Takauji
  • Patent number: 9869918
    Abstract: An electrochromic apparatus including a first support, a first electrode, a first transparent conductive layer, an electrochromic layer, a second support, a second electrode, a second transparent conductive layer, and an electrolyte layer is provided. The first and second supports have first and second surfaces, respectively, on each of which a plurality of grooves is formed. The grooves on the second surface are facing the grooves on the first surface. The first and second electrodes are disposed at each one of the plurality of grooves of the first and second supports, respectively. The first and second transparent conductive layers are in contact with the first and second surfaces, respectively. The electrochromic layer is in contact with the first transparent conductive layer. The electrolyte layer is between the electrochromic layer and the second transparent conductive layer.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: January 16, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Takahiko Matsumoto, Keiichiroh Yutani, Hidekazu Yaginuma, Koh Fujimura, Fuminari Kaneko, Mamiko Inoue, Sukchan Kim, Satoshi Yamamoto, Tohru Yashiro
  • Patent number: 9829762
    Abstract: To provide an electrochromic display element, which contains: a display substrate; a display electrode; an electrochromic layer provided in contact with the display electrode; a counter substrate provided to face the display substrate; a counter electrode; a charge retention layer provided in contact with the counter electrode; and an electrolyte layer filling between the display substrate and the counter substrate, wherein the electrochromic layer contains titanium oxide particles, and metal hydroxide is dispersed on surfaces and in inner parts of the titanium oxide particles.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: November 28, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hiroyuki Takahashi, Tamotsu Horiuchi, Tohru Yashiro, Keiichiroh Yutani, Yoshinori Okada, Sukchan Kim, Koh Fujimura, Yoshihisa Naijo, Kazuaki Tsuji, Shigenobu Hirano, Toshiya Sagisaka, Mamiko Inoue, Satoshi Yamamoto, Daisuke Goto
  • Publication number: 20170235203
    Abstract: To provide an electrochromic element, which contains: a first electrode; a second electrode; and an electrolyte provided between the first electrode and the second electrode, wherein the first electrode contains a polymer product obtained through polymerization of an electrochromic composition where the electrochromic composition contains a radical polymerizable compound containing triarylamine.
    Type: Application
    Filed: July 23, 2015
    Publication date: August 17, 2017
    Applicant: RICOH COMPANY, LTD.
    Inventors: Satoshi YAMAMOTO, Kazukiyo NAGAI, Tamotsu HORIUCHI, Keiichiroh YUTANI, Sukchan KIM, Yoshinori OKADA, Hiroyuki TAKAHASHI, Koh FUJIMURA, Yoshihisa NAIJO, Kazuaki TSUJI, Shigenobu HIRANO, Toshiya SAGISAKA, Daisuke GOTO, Keigo TAKAUJI, Mamiko INOUE, Tohru YASHIRO
  • Publication number: 20170226413
    Abstract: To provide an electrochromic compound, represented by the following general formula (I), where Ar1 is a pyridinium ring having a structure represented by the following general formula (IIa), (IIb), or (IIc), where Ar2 is a monovalent heterocyclic ring which may have a substituent, but Ar2 is not a pyridinium ring; R1 to R8 are each independently a monovalent group which may have a functional group, where the monovalent group may have a substituent; A is a monovalent group which may have a functional group, where the monovalent group may have a substituent; and B? is a monovalent anion.
    Type: Application
    Filed: June 17, 2015
    Publication date: August 10, 2017
    Inventors: Daisuke GOTO, Toshiya SAGISAKA, Shigenobu HIRANO, Satoshi YAMAMOTO, Mamiko INOUE, Tohru YASHIRO, Hiroyuki TAKAHASHI, Koh FUJIMURA, Tamotsu HORIUCHI, Keiichiroh YUTANI, Yoshihisa NAIJO, Yoshinori OKADA, Kazuaki TSUJI, Sukchan KIM, Keigo TAKAUJI
  • Patent number: 9688706
    Abstract: An electrochromic compound, represented by the following general formula (I); where X1 to X4 are each a substituent represented by the following general formula (II), an alkyl group that may contain a functional group, an aromatic hydrocarbon group that may contain a functional group, or a hydrogen atom, and at least two selected from X1 to X4 are the substituents represented by the general formula (II); where R1 to R8 are each independently a hydrogen atom, or a monovalent group that may contain a substituent; B is a substituted or unsubstituted monovalent group that may contain a functional group; A?is a monovalent anion; and m is any of 0 to 3, and R1 to R8, B, and m may each independently be different when a plurality of the substituents represented by the general formula (II) are present.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: June 27, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Mamiko Inoue, Masaomi Sasaki, Tohru Yashiro, Keiichiroh Yutani, Yoshinori Okada, Sukchan Kim, Hiroyuki Takahashi, Koh Fujimura, Yoshihisa Naijo, Kazuaki Tsuji, Shigenobu Hirano, Toshiya Sagisaka, Satoshi Yamamoto, Daisuke Goto, Keigo Takauji
  • Patent number: 9632385
    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: Grant
    Filed: March 22, 2013
    Date of Patent: April 25, 2017
    Assignee: 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: 9500926
    Abstract: Disclosed is an electrochromic display element, including a display substrate, a display electrode, an electrochromic layer, an opposed electrode, and an opposed substrate, wherein the electrochromic layer is formed on the display electrode, a liquid crystal composition that includes a low-molecular liquid crystal and an ionic liquid is present between the display electrode and the opposed electrode, and the ionic liquid includes a tetracyanoboric acid ion and/or tris(pentafluoroethyl)trifluorophosphoric acid ion as an anionic component.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: November 22, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Koh Fujimura, Tohru Yashiro, Shigenobu Hirano, Hiroyuki Takahashi, Yoshinori Okada, Yoshihisa Naijo, Kazuaki Tsuji, Sukchan Kim, Keiichiroh Yutani