Patents by Inventor Yoshinobu Nakayama
Yoshinobu Nakayama 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).
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Patent number: 8541925Abstract: A transformer T1 receives a sinusoidal signal on the primary side. The transformer T1 is provided with a terminal 3, a terminal 5, and a center tap 4 on the secondary side. The center tap 4 is connected to the anode of a diode D1. The cathode of the diode D1 is connected to the cathode of a diode D2 and one electrode of a capacitor C1. The other electrode of the capacitor C1 is connected to the anode of a diode D3 and a connection point of the second electrode of a piezoelectric element C2 and the first electrode of a piezoelectric element C3. The second electrode of the piezoelectric element C3 is connected to the terminal 3. The first electrode of the piezoelectric element C2 is connected to the cathode of the diode D3, the anode of the diode D2, and the terminal 5.Type: GrantFiled: March 2, 2011Date of Patent: September 24, 2013Assignee: Ricoh Company, LimitedInventors: Yoshinobu Nakayama, Takahiro Imai
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Publication number: 20110223044Abstract: A transformer T1 receives a sinusoidal signal on the primary side. The transformer T1 is provided with a terminal 3, a terminal 5, and a center tap 4 on the secondary side. The center tap 4 is connected to the anode of a diode D1. The cathode of the diode D1 is connected to the cathode of a diode D2 and one electrode of a capacitor C1. The other electrode of the capacitor C1 is connected to the anode of a diode D3 and a connection point of the second electrode of a piezoelectric element C2 and the first electrode of a piezoelectric element C3. The second electrode of the piezoelectric element C3 is connected to the terminal 3. The first electrode of the piezoelectric element C2 is connected to the cathode of the diode D3, the anode of the diode D2, and the terminal 5.Type: ApplicationFiled: March 2, 2011Publication date: September 15, 2011Inventors: Yoshinobu Nakayama, Takahiro Imai
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Patent number: 7768001Abstract: An off-current is reduced in an organic transistor, with which an organic transistor array is formed. A display apparatus is constructed using the organic transistor array. The organic transistor includes a substrate, a gate electrode, a separating electrode, a gate insulating film, a source electrode, a drain electrode, and an organic semiconductor layer. The organic transistor has a region in which the separating electrode and the organic semiconductor layer are laminated. A power supply is connected to the separating electrode.Type: GrantFiled: June 9, 2008Date of Patent: August 3, 2010Assignee: Ricoh Company, Ltd.Inventors: Takumi Yamaga, Ikue Kawashima, Yoshinobu Nakayama
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Patent number: 7550554Abstract: An aryl amine polymer is provided which contains a specific repeat unit, its use in preparing an organic semiconductor material which contains the aryl amine polymer and an additional specific compound and in the preparation of organic light emitting devices (OLED), organic thin film transistors (TFT) and so on, along with an organic TFT including a substrate, an organic semiconductor layer which contains the organic semiconductor material and is located overlying the substrate, an electrode pair of a source electrode and a drain electrode; and a third electrode.Type: GrantFiled: December 5, 2006Date of Patent: June 23, 2009Assignee: Ricoh Company, Ltd.Inventors: Toshiya Sagisaka, Masaomi Sasaki, Masafumi Torii, Shinichi Kawamura, Takashi Okada, Yoshinobu Nakayama, Yoshikazu Akiyama, Hitoshi Kondoh, Hidenori Tomono, Takumi Yamaga
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Publication number: 20090014715Abstract: An off-current is reduced in an organic transistor, with which an organic transistor array is formed. A display apparatus is constructed using the organic transistor array. The organic transistor includes a substrate, a gate electrode, a separating electrode, a gate insulating film, a source electrode, a drain electrode, and an organic semiconductor layer. The organic transistor has a region in which the separating electrode and the organic semiconductor layer are laminated. A power supply is connected to the separating electrode.Type: ApplicationFiled: June 9, 2008Publication date: January 15, 2009Inventors: Takumi YAMAGA, Ikue Kawashima, Yoshinobu Nakayama
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Patent number: 7239442Abstract: An optical frequency comb generator includes an oscillator (117) for oscillating modulating signals of a preset frequency, and an optical resonator (110) formed by an incident side reflecting mirror (112) and an outgoing side reflecting mirror (113), arranged parallel to each other. The optical resonator causes resonation in light incident via the incident side reflecting mirror (112). The optical frequency comb generator also includes an optical phase modulation unit (111) arranged between the incident side reflecting mirror (112) and the outgoing side reflecting mirror (113) for phase modulating the light, resonated by the optical resonator (110), by the modulating signals supplied from the oscillator (117), and for generating a plurality of sidebands centered about the frequency of the incident light at a frequency interval of the modulating signal. The outgoing side reflecting mirror (113) sets the transmittance from one frequency to another responsive to the light intensity of the generated sidebands.Type: GrantFiled: July 26, 2002Date of Patent: July 3, 2007Assignees: Japan Science and Technology AgencyInventors: Motonobu Kourogi, Widiyatmoko Bambang, Osamu Nakamoto, Shigeyoshi Misawa, Yoshinobu Nakayama
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Publication number: 20070092760Abstract: An aryl amine polymer is provided which contains a specific repeat unit, its use in preparing an organic semiconductor material which contains the aryl amine polymer and an additional specific compound and in the preparation of organic light emitting devices (OLED), organic thin film transistors (TFT) and so on, along with an organic TFT including a substrate, an organic semiconductor layer which contains the organic semiconductor material and is located overlying the substrate, an electrode pair of a source electrode and a drain electrode; and a third electrode.Type: ApplicationFiled: December 5, 2006Publication date: April 26, 2007Inventors: Toshiya Sagisaka, Masaomi Sasaki, Masafumi Torii, Shinichi Kawamura, Takashi Okada, Yoshinobu Nakayama, Yoshikazu Akiyama, Hitoshi Kondoh, Hidenori Tomono, Takumi Yamaga
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Patent number: 7166689Abstract: An aryl amine polymer is provided which contains a specific repeat unit, its use in preparing an organic semiconductor material which contains the aryl amine polymer and an additional specific compound and in the preparation of organic light emitting devices (OLED), organic thin film transistors (TFT) and so on, along with an organic TFT including a substrate, an organic semiconductor layer which contains the organic semiconductor material and is located overlying the substrate, an electrode pair of a source electrode and a drain electrode; and a third electrode.Type: GrantFiled: February 13, 2004Date of Patent: January 23, 2007Assignee: Ricoh Company, Ltd.Inventors: Toshiya Sagisaka, Masaomi Sasaki, Masafumi Torii, Shinichi Kawamura, Takashi Okada, Yoshinobu Nakayama, Yoshikazu Akiyama, Hitoshi Kondoh, Hidenori Tomono, Takumi Yamaga
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Publication number: 20050018276Abstract: An optical frequency comb generator includes an oscillator (117) for oscillating modulating signals of a preset frequency, and an optical resonator (110) formed by an incident side reflecting mirror (112) and an outgoing side reflecting mirror (113), arranged parallel to each other. The optical resonator causes resonation in light incident via the incident side reflecting mirror (112). The optical frequency comb generator also includes an optical phase modulation unit (111) arranged between the incident side reflecting mirror (112) and the outgoing side reflecting mirror (113) for phase modulating the light, resonated by the optical resonator (110), by the modulating signals supplied from the oscillator (117), and for generating a plurality of sidebands centered about the frequency of the incident light at a frequency interval of the modulating signal. The outgoing side reflecting mirror (113) sets the transmittance from one frequency to another responsive to the light intensity of the generated sidebands.Type: ApplicationFiled: July 26, 2002Publication date: January 27, 2005Inventors: Motonobu Kourogi, Widiyatmoko Bambang, Osamu Nakamoto, Shigeyoshi Misawa, Yoshinobu Nakayama
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Publication number: 20040212042Abstract: An aryl amine polymer is provided which contains a specific repeat unit, its use in preparing an organic semiconductor material which contains the aryl amine polymer and an additional specific compound and in the preparation of organic light emitting devices (OLED), organic thin film transistors (TFT) and so on, along with an organic TFT including a substrate, an organic semiconductor layer which contains the organic semiconductor material and is located overlying the substrate, an electrode pair of a source electrode and a drain electrode; and a third electrode.Type: ApplicationFiled: February 13, 2004Publication date: October 28, 2004Inventors: Toshiya Sagisaka, Masaomi Sasaki, Masafumi Torii, Shinichi Kawamura, Takashi Okada, Yoshinobu Nakayama, Yoshikazu Akiyama, Hitoshi Kondoh, Hidenori Tomono, Takumi Yamaga
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Patent number: 5703288Abstract: A thermally-sensitive type flow meter measures a flow rate with a high accuracy by eliminating a noise generated in a source voltage. The flow meter includes a sensor chip comprising a substrate carrying sensing elements. First and second resistors are provided on first and second bridges formed over a depression formed on the substrate. The first bridge is positioned on an upstream side and the second bridge is positioned on a downstream side. The first and second resistors generate a heat by the same voltage source. First and second temperature measuring resistors are provided adjacent to the first and second resistors, respectively, to measure a temperature of the first and second resistors. Third and fourth temperature measuring resistors are provided for measuring the temperature of the fluid. A temperature control unit, including the first, second, third and fourth temperature measuring resistors, controls a temperature of each of the first and second resistors to be constant.Type: GrantFiled: July 17, 1996Date of Patent: December 30, 1997Assignees: Ricoh Company, Ltd., Ricoh Elemex Corporation, Ricoh Seiki Company, Ltd.Inventors: Hiroyuki Horiguchi, Yoshinobu Nakayama
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Patent number: 5208800Abstract: A magneto-optical signal detection device comprising a thin film type optical waveguide unit having a substrate on which a waveguide is formed. The unit has a coupling portion for coupling two polarization components simultaneously in a same plane of the waveguide as a TE mode and a TM mode. The modes TE and TM are included in reflection light reflected from a magneto-optical recording medium and perpendicular to each other. The unit also has a TE-TM mode separating portion having a taper boundary. A waveguide layer is gradually thinned in the taper boundary toward an outer end thereof.Type: GrantFiled: April 11, 1991Date of Patent: May 4, 1993Assignee: Ricoh Company, Ltd.Inventors: Tami Isobe, Shigeyoshi Misawa, Kiyoshi Yokomori, Syunsuke Fujita, Magane Aoki, Yoshinobu Nakayama, Hiroyoshi Funato
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Patent number: 5119452Abstract: A high efficiency prism coupling device that comprises a substrate, an optical waveguide layer disposed on the substrate, a gap adjuster layer disposed on the waveguide layer and a prism secured to the gap adjuster layer through a dielectric adhesive agent. The gap adjuster layer has a refractive index which is lower than that of the waveguide layer. The gap adjuster layer has a recess formed therein for guiding an incident beam to the waveguide layer through a bottom portion thereof. The adhesive agent is disposed in and around the recess and has a refractive index which is higher than that of the waveguide layer. The prism is made from a dielectric material and disposed above the recess of the gap adjuster layer through the adhesive agent. The prism has a refractive index which is higher than that of the waveguide layer. The incident beam is introduced from outside through the prism, the adhesive agent and the bottom portion of the recess to the waveguide layer.Type: GrantFiled: June 7, 1990Date of Patent: June 2, 1992Assignee: Ricoh Company, Ltd.Inventors: Kiyoshi Yokomori, Yoshinobu Nakayama, Shigeyoshi Misawa, Tami Isobe, Syunsuke Fujita, Hiroyoshi Funato, Magane Aoki