Patents by Inventor Eiichi Ohta

Eiichi Ohta 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: 9512521
    Abstract: A method of manufacturing a metal oxide film is disclosed. The method includes the steps of soaking a substrate on which the metal oxide film is formed in a precursor solution for forming the metal oxide film; and irradiating and scanning a light, the light being collected at an interface between the substrate and the precursor solution, wherein the light is transmitted through the precursor solution, and the metal oxide film is formed on the substrate.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: December 6, 2016
    Assignees: RICOH COMPANY, LTD., TOHOKU UNIVERSITY
    Inventors: Akira Watanabe, Eiichi Ohta, Akira Shimofuku
  • Patent number: 8960866
    Abstract: Disclosed is an electromechanical transducer element including a first electrode disposed on a substrate; an electromechanical transducer film disposed on a first portion of the first electrode; and a second electrode disposed on a second portion of the electromechanical transducer film, wherein an actuator portion formed by laminating the substrate, the first electrode, the electromechanical transducer film, and the second electrode has a stiffness such that, in a cross section of the actuator portion, the stiffness gradually increases from an end portion of the actuator portion to a center portion of the actuator portion.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: February 24, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Osamu Machida, Yoshikazu Akiyama, Ryo Tashiro, Akira Shimofuku, Eiichi Ohta, Kenichi Ogata
  • Patent number: 8585188
    Abstract: A thin-film actuator that deforms a diaphragm to generate force includes a lower electrode disposed on the diaphragm, a first piezoelectric layer disposed on the lower electrode, an intermediate electrode disposed on the first piezoelectric layer, a second piezoelectric layer disposed on the intermediate electrode, and an upper electrode disposed on the second piezoelectric layer.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: November 19, 2013
    Assignee: Ricoh Company, Limited
    Inventor: Eiichi Ohta
  • Publication number: 20130176364
    Abstract: Disclosed is an electromechanical transducer element including a first electrode disposed on a substrate; an electromechanical transducer film disposed on a first portion of the first electrode; and a second electrode disposed on a second portion of the electromechanical transducer film, wherein an actuator portion formed by laminating the substrate, the first electrode, the electromechanical transducer film, and the second electrode has a stiffness such that, in a cross section of the actuator portion, the stiffness gradually increases from an end portion of the actuator portion to a center portion of the actuator portion.
    Type: Application
    Filed: January 9, 2013
    Publication date: July 11, 2013
    Applicant: RICOH COMPANY, LTD.
    Inventors: Osamu Machida, Yoshikazu Akiyama, Ryo Tashiro, Akira Shimofuku, Eiichi Ohta, Kenichi Ogata
  • Publication number: 20130050353
    Abstract: A thin-film actuator that deforms a diaphragm to generate force includes a lower electrode disposed on the diaphragm, a first piezoelectric layer disposed on the lower electrode, an intermediate electrode disposed on the first piezoelectric layer, a second piezoelectric layer disposed on the intermediate electrode, and an upper electrode disposed on the second piezoelectric layer.
    Type: Application
    Filed: October 24, 2012
    Publication date: February 28, 2013
    Inventor: Eiichi OHTA
  • Publication number: 20120276303
    Abstract: A method of manufacturing a metal oxide film is disclosed. The method includes the steps of soaking a substrate on which the metal oxide film is formed in a precursor solution for forming the metal oxide film; and irradiating and scanning a light, the light being collected at an interface between the substrate and the precursor solution, wherein the light is transmitted through the precursor solution, and the metal oxide film is formed on the substrate.
    Type: Application
    Filed: April 24, 2012
    Publication date: November 1, 2012
    Applicants: TOHOKU UNIVERSITY, RICOH COMPANY, LTD.
    Inventors: Akira WATANABE, Eiichi OHTA, Akira SHIMOFUKU
  • Publication number: 20120028075
    Abstract: A thin film manufacturing method includes placing a substrate in a raw material solution with which a thin film is formed on a first principal plane of the substrate; forming the thin film on the first principal plane of the substrate by applying light to a first principal plane side from a light source; measuring a distance from the first principal plane of the substrate to a liquid surface of the raw material solution by applying light from the light source; and adjusting a position of the substrate in a height direction on the basis of a measurement result obtained at the measuring.
    Type: Application
    Filed: July 11, 2011
    Publication date: February 2, 2012
    Inventors: Masahiro YAGI, Eiichi Ohta, Yoshikazu Akiyama, Ryoh Tashiro, Osamu Machida
  • Patent number: 8086141
    Abstract: An electric charging apparatus charges a surface of a charging object. The electric charging apparatus includes an electric field forming device including two electrodes facing each other that form an electric field therebetween. An electron discharging member is provided at a portion of one of the two electrodes that faces the other electrode and discharges electrons into the electric field. The electric charging apparatus also includes a voltage applying controller that controls a voltage applied to the two electrodes. The voltage applying controller selects two or more nonzero intensities of the electric field.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: December 27, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukimichi Someya, Eiichi Ohta, Naomi Sugimoto, Takuro Sekiya, Yasuo Katano, Shohji Tanaka, Yoshihiko Iijima, Toshihiro Ishii
  • Publication number: 20110123728
    Abstract: A thin film manufacturing method includes the steps of a) placing a substrate including a first main surface inside a reaction container filled with a raw material solution, and b) forming a thin film by irradiating a light in the direction of the first main surface of the substrate.
    Type: Application
    Filed: November 23, 2010
    Publication date: May 26, 2011
    Applicant: RICOH COMPANY, LTD.
    Inventors: Eiichi OHTA, Masahiro Yagi
  • Publication number: 20100302323
    Abstract: A fluid discharge head includes a fluid chamber filled with ink; a discharge opening configured to discharge a droplet of ink from the fluid chamber; a plurality of piezoelectric elements configured as displacement generating units to provide kinetic energy to the ink for the discharge of the ink droplet; and a vibrating plate forming a part of the fluid chamber and connected to the piezoelectric elements, the vibrating plate being configured to transmit a displacement generated by the piezoelectric elements to the ink in the fluid chamber. The vibrating plate includes vibrating portions for the respective the piezoelectric elements. The vibrating portions are configured to be independently displaced for the corresponding piezoelectric elements, and at least one of the piezoelectric elements is configured as a pressure detecting unit to detect an ink pressure in the fluid chamber.
    Type: Application
    Filed: April 22, 2010
    Publication date: December 2, 2010
    Inventors: Masahiro YAGI, Kenji Asuwa, Dongsik Jang, Yoshikazu Akiyama, Eiichi Ohta, Yukitoshi Tajima, Takeshi Takemoto
  • Publication number: 20100231659
    Abstract: A thin-film actuator that deforms a diaphragm to generate force includes a lower electrode disposed on the diaphragm, a first piezoelectric layer disposed on the lower electrode, an intermediate electrode disposed on the first piezoelectric layer, a second piezoelectric layer disposed on the intermediate electrode, and an upper electrode disposed on the second piezoelectric layer.
    Type: Application
    Filed: March 12, 2010
    Publication date: September 16, 2010
    Inventor: Eiichi OHTA
  • Patent number: 7728503
    Abstract: An electron emission element according to the present invention is compact, thin and low cost, and has a structure and constitution in which deterioration of the electron emission material itself is low. In the electron emission element, boron nitride material is used as the electron emission material, and a metal material or a semiconductor material is used as a substrate for forming the boron nitride material. In this way it is possible to obtain good quality boron nitride material on the substrate. Also, a voltage can be applied to the material to emit electrons, also electrons can be supplied. Moreover, by using Sp3-bonded boron nitride as the boron nitride material, and using Sp3-bonded 5H—BN material or Sp3-bonded 6H—BN material as the Sp3-bonded boron nitride, a field electron emission element can be achieved for which high efficiency electron emission characteristics unprecedented in conventional art can be obtained.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: June 1, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Eiichi Ohta, Takuro Sekiya, Naomi Sugimoto, Yukimichi Someya, Shohji Tanaka, Yasuo Katano, Yoshihiko Iijima, Toshihiro Ishii
  • Patent number: 7715760
    Abstract: A charging device including an electron discharging device for forming a latent electrostatic image on an image bearing member and containing an sp3 bonding material and an electroconductive portion.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: May 11, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Naomi Sugimoto, Yukimichi Someya, Sadayuki Iwai, Katsufumi Kumano, Eiichi Ohta
  • Publication number: 20100073697
    Abstract: An electric charging apparatus and an image forming apparatus using the electric charging apparatus, capable of stably discharging electrons and reducing deterioration in an electron discharging member, which includes an electric field forming device including two electrodes facing each other to form electric field therebetween including an electron discharging member provided at a portion of one of the electrodes, where the portion faces the other electrode, to discharge electrons into the electric field, and a voltage applying controller to control voltage applied to the electrodes, wherein the voltage applying controller selects two or more intensities of the electric field.
    Type: Application
    Filed: March 19, 2008
    Publication date: March 25, 2010
    Inventors: Yukimichi Someya, Eiichi Ohta, Naomi Sugimoto, Takuro Sekiya, Yasuo Katano, Shohji Tanaka, Yoshihiko Iijima, Toshihiro Ishii
  • Patent number: 7554574
    Abstract: In a state deciding apparatus, an information acquiring unit acquires pieces of information of different types related to a state of an image forming apparatus. An index value calculating unit calculates an index value based on the pieces of information acquired. A state change deciding unit decides a change in a subsequent state of the image forming apparatus, based on a temporal change in the index value calculated.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: June 30, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Hisashi Shoji, Katsuaki Miyawaki, Osamu Satoh, Masaaki Yamada, Shuji Hirai, Yoshinori Nakagawa, Eiichi Ohta, Takashi Seto, Satoshi Ouchi, Nekka Matsuura
  • Publication number: 20090116872
    Abstract: A charging device including an electron discharging device for forming a latent electrostatic image on an image bearing member and containing an sp3 bonding material and an electroconductive portion.
    Type: Application
    Filed: April 19, 2006
    Publication date: May 7, 2009
    Inventors: Naomi Sugimoto, Yukimichi Someya, Sadayuki Iwai, Katsufumi Kumano, Eiichi Ohta
  • Publication number: 20070231010
    Abstract: An electron emission element according to the present invention is compact, thin and low cost, and has a structure and constitution in which deterioration of the electron emission material itself is low. In the electron emission element, boron nitride material is used as the electron emission material, and a metal material or a semiconductor material is used as a substrate for forming the boron nitride material. In this way it is possible to obtain good quality boron nitride material on the substrate. Also, a voltage can be applied to the material to emit electrons, also electrons can be supplied. Moreover, by using Sp3-bonded boron nitride as the boron nitride material, and using Sp3-bonded 5H—BN material or Sp3-bonded 6H—BN material as the Sp3-bonded boron nitride, a field electron emission element can be achieved for which high efficiency electron emission characteristics unprecedented in conventional art can be obtained.
    Type: Application
    Filed: March 28, 2007
    Publication date: October 4, 2007
    Inventors: Eiichi Ohta, Takuro Sekiya, Naomi Sugimoto, Yukimichi Someya, Shohji Tanaka, Yasuo Katano, Yoshihiko Iijima, Toshihiro Ishii
  • Patent number: 7166486
    Abstract: A center beam which is formed out of a thin film constituted to be combined with a light reflection film provided on one surface of the center beam, which has both ends fixed and which is deformed by an electronic force; a substrate electrode which is opposed to the center beam through a gap formed on the other surface of the center beam; an opposed surface which is a surface of the substrate electrode opposed to the center beam modulating the incident light on the light reflection film, the opposed surface restricting deformation of the center beam due to application of a driving voltage to the substrate electrode by abutting on the center beam; and a substrate which has the substrate electrode having the opposed surface, formed in a concave section, and which holds a to-be-held section of the center beam, are provided.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: January 23, 2007
    Assignee: Ricoh Company, Ltd.
    Inventors: Kouichi Ohtaka, Seiichi Katoh, Takeshi Nanjyo, Masanori Horike, Eiichi Ohta
  • Publication number: 20050264866
    Abstract: A center beam which is formed out of a thin film constituted to be combined with a light reflection film provided on one surface of the center beam, which has both ends fixed and which is deformed by an electronic force; a substrate electrode which is opposed to the center beam through a gap formed on the other surface of the center beam; an opposed surface which is a surface of the substrate electrode opposed to the center beam modulating the incident light on the light reflection film, the opposed surface restricting deformation of the center beam due to application of a driving voltage to the substrate electrode by abutting on the center beam; and a substrate which has the substrate electrode having the opposed surface, formed in a concave section, and which holds a to-be-held section of the center beam, are provided.
    Type: Application
    Filed: August 3, 2005
    Publication date: December 1, 2005
    Inventors: Kouichi Ohtaka, Seiichi Katoh, Takeshi Nanjyo, Masanori Horike, Eiichi Ohta
  • Patent number: 6947195
    Abstract: A center beam which is formed out of a thin film constituted to be combined with a light reflection film provided on one surface of the center beam, which has both ends fixed and which is deformed by an electronic force; a substrate electrode which is opposed to the center beam through a gap formed on the other surface of the center beam; an opposed surface which is a surface of the substrate electrode opposed to the center beam modulating the incident light on the light reflection film, the opposed surface restricting deformation of the center beam due to application of a driving voltage to the substrate electrode by abutting on the center beam; and a substrate which has the substrate electrode having the opposed surface, formed in a concave section, and which holds a to-be-held section of the center beam, are provided.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: September 20, 2005
    Assignee: Ricoh Company, Ltd.
    Inventors: Kouichi Ohtaka, Seiichi Katoh, Takeshi Nanjyo, Masanori Horike, Eiichi Ohta