Patents by Inventor Yoshihisa Naijo

Yoshihisa Naijo 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: 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
  • 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
  • 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: 8441713
    Abstract: An electrophoretic liquid is disclosed that includes first particles that have the property of scattering light over an entire visible range and are positively or negatively charged; second particles that have the property of absorbing light of a specific wavelength range in the visible range and scattering light of ranges other than the specific wavelength range and are charged to a polarity opposite to that of the first particles; and a dispersion medium that has the property of allowing the light of the specific wavelength range absorbed by the second particles to pass through and absorbing the light of the ranges other than the specific wavelength range. In the electrophoretic liquid, the first particles and the second particles are dispersed in the dispersion medium.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: May 14, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Ikue Kawashima, Masahiro Masuzawa, Masahiro Yanagisawa, 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
  • Publication number: 20120139824
    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: Application
    Filed: November 30, 2011
    Publication date: June 7, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hiroyuki TAKAHASHI, Yoshinori OKADA, Tohru YASHIRO, Akishige MURAKAMI, Shigenobu HIRANO, Yoshihisa NAIJO
  • Publication number: 20120125414
    Abstract: The photoelectric converter includes a substrate; and multiple cells located on the substrate so as to be overlaid. The first cell contacted with the substrate includes a transparent electrode located on the substrate, and a first photoelectric conversion layer located on the transparent electrode. The other cell or each of the others of the multiple cells includes a porous electroconductive layer located closer to the substrate and including an electroconductive material, and a photoelectric conversion layer located on the porous electroconductive layer. Each of the photoelectric conversion layers of the multiple cells includes an electron transport layer including an electron transport material, a dye connected with or adsorbed on the electron transport material, and a hole transport material. The hole transport material is also contained in voids of the porous electroconductive layer.
    Type: Application
    Filed: October 27, 2011
    Publication date: May 24, 2012
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hisamitsu KAMEZAKI, Yoshihisa NAIJO, Tohru YASHIRO, Tamotsu HORIUCHI, Masafumi TORII
  • Patent number: 8144117
    Abstract: When not receiving the next display-switch starting signal even after a specified time elapses from the application of a previous display driving voltage, a driving unit applies another preparatory driving voltage for generating a preparatory electric field capable of improving the response of colored particles to a driving electric field to an extent so as not to change the arrangement of the colored particles between pixel electrodes and a transparent electrode for a preparatory driving time.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: March 27, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Atsushi Okada, Masahiro Yanagisawa, Yoshihisa Naijo
  • 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
  • Publication number: 20110134508
    Abstract: An electrophoretic liquid is disclosed that includes first particles that have the property of scattering light over an entire visible range and are positively or negatively charged; second particles that have the property of absorbing light of a specific wavelength range in the visible range and scattering light of ranges other than the specific wavelength range and are charged to a polarity opposite to that of the first particles; and a dispersion medium that has the property of allowing the light of the specific wavelength range absorbed by the second particles to pass through and absorbing the light of the ranges other than the specific wavelength range. In the electrophoretic liquid, the first particles and the second particles are dispersed in the dispersion medium.
    Type: Application
    Filed: August 4, 2009
    Publication date: June 9, 2011
    Inventors: Ikue Kawashima, Masahiro Masuzawa, Masahiro Yanagisawa, Yoshihisa Naijo