Patents by Inventor Tohru Yashiro

Tohru Yashiro 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: 20150198857
    Abstract: An electrochromic device, which contains: one support; a first electrode layer formed on the support; a second electrode layer provided to face the first electrode layer; an electrochromic layer provided to be in contact with the first electrode layer or the second electrode layer; a solid electrolyte layer containing inorganic particles, which is filled between the first electrode layer and the second electrode layer, and is provided to be in contact with the electrochromic layer; and a protective layer provided on the second electrode layer.
    Type: Application
    Filed: January 9, 2015
    Publication date: July 16, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tohru Yashiro, Shigenobu HIRANO, Toshiya SAGISAKA, Mamiko INOUE, Hiroyuki TAKAHASHI, Koh FUJIMURA, Yoshihisa NAIJO, Kazuaki TSUJI, Yoshinori OKADA, Sukchan KIM, Keiichiroh YUTANI, Tamotsu HORIUCHI
  • Patent number: 9069222
    Abstract: Disclosed is an electrochromic display element, including a display substrate, an opposed substrate that is opposed to the display substrate, an opposed electrode being formed at a display-substrate-opposed side of the opposed substrate, a first display electrode and a first electrochromic layer being laminated at an opposed-substrate-opposed side of the display substrate, a single porous film being formed between the display substrate and the opposed substrate, a second display electrode and a second electrochromic layer being laminated at a display-substrate-opposed side of the porous film, a third display electrode and a third electrochromic layer being laminated at an opposed-substrate-opposed side of the porous film, and an electrolyte being present between the display substrate and the opposed substrate.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: June 30, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yoshihisa Naijo, Tohru Yashiro, Yoshinori Okada, Shigenobu Hirano, Koh Fujimura, Kazuaki Tsuji, Hiroyuki Takahashi, Sukchan Kim, Keiichiroh Yutani, Toshiya Sagisaka
  • Publication number: 20150168796
    Abstract: Disclosed is an electrochromic device that has a first electrode layer, a second electrode layer provided to oppose the first electrode layer, an electrochromic layer provided between the first electrode layer and the second electrode layer, and an electrolyte filling a predetermined region between the first electrode layer and the second electrode layer, wherein a through-hole is formed on at least one layer of the first electrode layer and the second electrode layer and wherein a supporter is provided on only either one side of an outside of the first electrode layer and an outside of the second electrode layer.
    Type: Application
    Filed: July 22, 2013
    Publication date: June 18, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tohru Yashiro, Yoshihisa Naijo, Shigenobu Hirano, Sukchan Kim, Koh Fujimura, Kazuaki Tsuji, Hiroyuki Takahashi, Yoshinori Okada, Keiichiroh Yutani, Tamotsu Horiuchi
  • Patent number: 9041997
    Abstract: An electro-chromic display element includes a display electrode 1 provided on a display substrate 1b an electro-chromic layer 3 provided on the display electrode 1; multiple opposing electrodes 2 which are provided on an opposing substrate 2b and which are arranged to oppose the display electrode 1; an electrolytic layer 4 provided between the display electrode 1 and the multiple opposing electrodes 2; and an erasing electrode 5 placed between the display electrode 1 and the multiple opposing electrodes 2 and which is arranged such that the electro-chromic layer 3 is placed between the third electrode and the display electrode 1.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: May 26, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hiroyuki Takahashi, Tohru Yashiro, Koh Fujimura, Akishige Murakami, Shigenobu Hirano, Yoshihisa Naijo, Yoshinori Okada, Kazuaki Tsuji, Sukchan Kim
  • Patent number: 8937758
    Abstract: An electrochromic display device includes an electrochromic display element including a display electrode, an electrochromic layer provided on the display electrode, an opposing electrode facing the display electrode, and an electrolyte layer sandwiched between the display electrode and the opposing electrode. The electrochromic display device further includes a switching element, and a electric storage element. The display electrode is connected with the opposing electrode by a power source or the electric storage element via the switching element, and when performing driving, part of electric charges, which are stored in the electrochromic display element, are applied for charging the electric storage element, or electric charges in the electric storage element that has been charged are used for driving the electrochromic display element.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: January 20, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Sukchan Kim, Tohru Yashiro, Koh Fujimura, Hiroyuki Takahashi, Shigenobu Hirano, Yoshihisa Naijo, Yoshinori Okada, Kazuaki Tsuji
  • Patent number: 8927082
    Abstract: To provide an optical recording medium including: a substrate having at least one of grooves and pits on a surface thereof; and a dye recording layer formed over the substrate, wherein the dye recording layer comprises a cyanine dye represented by the following General Formula (I), a squaric acid complex represented by the following General Formula (II), and an amine compound.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: January 6, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Tohru Yashiro, Satoshi Mizukami
  • Patent number: 8902151
    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: Grant
    Filed: December 2, 2011
    Date of Patent: December 2, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Tohru Yashiro, Shigenobu Hirano, Yoshihisa Naijo, Koh Fujimura, Akishige Murakami, Hiroyuki Takahashi, Yoshinori Okada
  • Publication number: 20140268284
    Abstract: Disclosed is an electrochromic display element, including a display substrate, an opposed substrate that is opposed to the display substrate, an opposed electrode being formed at a display-substrate-opposed side of the opposed substrate, a first display electrode and a first electrochromic layer being laminated at an opposed-substrate-opposed side of the display substrate, a single porous film being formed between the display substrate and the opposed substrate, a second display electrode and a second electrochromic layer being laminated at a display-substrate-opposed side of the porous film, a third display electrode and a third electrochromic layer being laminated at an opposed-substrate-opposed side of the porous film, and an electrolyte being present between the display substrate and the opposed substrate.
    Type: Application
    Filed: January 29, 2014
    Publication date: September 18, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshihisa Naijo, Tohru Yashiro, Yoshinori Okada, Shigenobu Hirano, Koh Fujimura, Kazuaki Tsuji, Hiroyuki Takahashi, Sukchan Kim, Keiichiroh Yutani, Toshiya Sagisaka
  • Publication number: 20140212705
    Abstract: A solid dye sensitization type solar cell includes a substrate, a first electrode disposed on the substrate, an electron transport layer including an electron transport semiconductor and disposed on the first electrode, the electron transport layer including a photosensitizing compound adsorbed on a surface of the electron transport semiconductor, a hole transport layer disposed on the electron transport layer, and a second electrode disposed on the hole transport layer. Each of the first electrode and the second electrode includes divided multiple electrodes.
    Type: Application
    Filed: January 15, 2014
    Publication date: July 31, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tamotsu Horiuchi, Tohru Yashiro, Hiroshi Deguchi, Hisamitsu Kamezaki, Takumi Yamaga, Keiichiroh Yutani, Yuko Arizumi
  • Patent number: 8743048
    Abstract: A disclosed electrochromic display element includes a display substrate, a counter substrate facing the display substrate, display electrodes arranged between the display substrate and the counter substrate, electrochromic layers formed on the respective display electrodes, a plurality of drive elements arranged on the counter substrate at predetermined intervals, a plurality of pixel electrodes arranged on the drive elements, a charge retention layer formed over the pixel electrodes as a continuous layer, the charge retention layer being formed of a mixed film including a polymer and one of electric conductive microparticles and semiconductor microparticles, and an electrolyte layer sandwitched between the display substrate and the charge retention layer.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: June 3, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroyuki Takahashi, Yoshinori Okada, Tohru Yashiro, Akishige Murakami, Shigenobu Hirano, Yoshihisa Naijo
  • Patent number: 8736941
    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: Grant
    Filed: March 11, 2011
    Date of Patent: May 27, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihisa Naijo, Tohru Yashiro, Shigenobu Hirano, Masahiro Yanagisawa, Masahiro Masuzawa, Akishige Murakami, Hiroyuki Takahashi, Koh Fujimura, Yoshinori Okada
  • Patent number: 8687262
    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: Grant
    Filed: December 12, 2011
    Date of Patent: April 1, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Tohru Yashiro, Shigenobu Hirano, Koh Fujimura, Yoshihisa Naijo, Yoshinori Okada, Hiroyuki Takahashi, Akishige Murakami
  • Publication number: 20140078569
    Abstract: An electro-chromic display element, and a display apparatus and a driving method using the same are provided. The electro-chromic display element includes at least a display substrate 1b; a display electrode 1 provided on the display substrate 1b; an electro-chromic layer 3 provided on the display electrode 1; an opposing substrate 2b; multiple opposing electrodes 2 which are provided on the opposing substrate 2b and which are arranged to oppose the display electrode 1; and an electrolytic layer 4 provided such that it is placed between the display electrode 1 and the multiple opposing electrodes 2. The electro-chromic display element further includes an erasing electrode 5, which is a third electrode which is placed between the display electrode 1 and the multiple opposing electrodes 2 and which is arranged such that the electro-chromic layer 3 is placed between the third electrode and the display electrode 1.
    Type: Application
    Filed: May 15, 2012
    Publication date: March 20, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hiroyuki Takahashi, Tohru Yashiro, Koh Fujimura, Akishige Murakami, Shigenobu Hirano, Yoshihisa Naijo, Yoshinori Okada, Kazuaki Tsuji, Sukchan Kim
  • Publication number: 20130335802
    Abstract: An electrochromic display device includes an electrochromic display element including a display electrode, an electrochromic layer provided on the display electrode, an opposing electrode facing the display electrode, and an electrolyte layer sandwiched between the display electrode and the opposing electrode. The electrochromic display device further includes a switching element, and a electric storage element. The display electrode is connected with the opposing electrode by a power source or the electric storage element via the switching element, and when performing driving, part of electric charges, which are stored in the electrochromic display element, are applied for charging the electric storage element, or electric charges in the electric storage element that has been charged are used for driving the electrochromic display element.
    Type: Application
    Filed: May 10, 2013
    Publication date: December 19, 2013
    Applicant: RICOH COMPANY, LTD.
    Inventors: Sukchan Kim, Tohru Yashiro, Koh Fujimura, Hiroyuki Takahashi, Shigenobu Hirano, Yoshihisa Naijo, Yoshinori Okada, Kazuaki Tsuji
  • Patent number: 8593715
    Abstract: Disclosed are electrochromic compounds represented by the formulas defined in the specification.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: November 26, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Tohru Yashiro, Shigenobu Hirano, Yousuke Manabe, Satoshi Hayashi
  • Publication number: 20130258439
    Abstract: Disclosed is a method for manufacturing an electrochromic display device, including a step of applying and attaching a fine particle with a predetermined particle diameter to a display substrate, a step of film-forming a transparent electrically conductive film after the fine particle is applied thereto, a step of removing the fine particle to remove a transparent electrically conductive film attached to a surface of the fine particle and to form a display electrode having a fine through-hole at a position at which the fine particle has been attached thereto, and a step of forming an electrochromic layer on the display electrode.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 3, 2013
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshihisa Naijo, Tohru Yashiro, Shigenobu Hirano, Yoshinori Okada, Sukchan Kim, Koh Fujimura, Hiroyuki Takahashi, Kazuaki Tsuji
  • 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: 8431207
    Abstract: The present invention provides an optical recording material allows for obtaining excellent recording signal properties even at high-speed recording and is excellent in durability in both a single-sided single layer optical recording medium and a single-sided two-layer optical recording medium having a first recording layer and a second recording layer. The optical recording material contains a cyanine compound having a specific structure and a squarylium compound as dyes for optical recording layers.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: April 30, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Tohru Yashiro, Fumiya Ohmi, Satoshi Mizukami, Yuki Nakamura, Masahiro Hayashi, Ippei Matsumoto
  • 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