Patents by Inventor Yuuki Ohta

Yuuki 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).

  • Publication number: 20110001732
    Abstract: In at least one embodiment, each of stages connected in cascade includes a first circuit which causes a predetermined section in a corresponding one of the stages to be connected to a low-potential power source, the first circuit being constituted by TFTs, a first type of clock signal being used as a signal which is transferred to an output terminal of each of the stages so as to be outputted as an output signal, a second type of clock signal being used as a signal which drives the first circuit. With the arrangement, it is possible to realize a shift register circuit that is capable of further suppressing a shift phenomenon of a threshold voltage in each of the TFTs.
    Type: Application
    Filed: October 22, 2008
    Publication date: January 6, 2011
    Inventors: Hideki Morii, Akihisa Iwamoto, Takayuki Mizunaga, Yuuki Ohta, Masahiro Hirokane, Shinya Tanaka, Hajime Imai, Tetsuo Kikuchi
  • Publication number: 20110001752
    Abstract: A display panel drive circuit including a shift register including unit circuits connected in cascade, each of the unit circuits outputting a signal line selection signal, is so configured that: each of the unit circuits receives a clock signal nd either a signal line selection signal outputted from another-stage unit circuit or a start pulse signal, and the clock signal has a returned portion following an activation portion thereof, the returned portion including a first region that is sloped and a second region that is sloped more steeply than the first region. With the configuration, it is possible to realize a display panel drive circuit and a display panel driving method each of which (i) restrains an occurrence of a poor gate-on pulse signal, (ii) improves a pixel charging rate, and (iii) allows a clock signal to have higher frequency.
    Type: Application
    Filed: December 4, 2008
    Publication date: January 6, 2011
    Inventors: Yuuki Ohta, Hideki Morii, Akihisa Iwamoto, Takayuki Mizunaga, Masahiro Hirokane
  • Publication number: 20100325466
    Abstract: In at least one embodiment, a display panel drive circuit including a shift register including unit circuits connected in cascade, each of the unit circuits outputting a signal line selection signal, is configured such that: each of the unit circuits receives a clock signal and either a signal line selection signal outputted from another-stage unit circuit or a start pulse signal; and the clock signal has a rising portion which is caused by activation of the clock signal and which is sloped or a falling portion which is caused by activation of the clock signal and which is sloped. With the configuration, it is possible to realize a display panel drive circuit and a display panel driving method each of which hardly causes a poor gate-on pulse signal (which causes unevenness in electric potential during inactivation, for example.
    Type: Application
    Filed: December 4, 2008
    Publication date: December 23, 2010
    Inventors: Yuuki Ohta, Hideki Morii, Akihisa Iwamoto, Takayuki Mizunaga, Masahiro Hirokane
  • Publication number: 20100321372
    Abstract: Each stage of first and second shift registers outputs a scan pulse by transferring a clock pulse of a clock signal supplied through a first clock input terminal. A first transistor is provided in at least one embodiment so as to connect and disconnect a scan signal line corresponding to the individual stage to and from a low-level power source of the scan pulse, and the first transistor has a gate that receives a clock signal supplied through a second clock input terminal. Two clock signals supplied to the first shift register and two clock signals supplied to the second shift register are different from each other in timings of their clock pulses. This realizes a display device capable of curbing the phenomenon in which a threshold voltage of a sink-down transistor is shifted, while sinking the gate line voltage down.
    Type: Application
    Filed: October 20, 2008
    Publication date: December 23, 2010
    Inventors: Akihisa Iwamoto, Hideki Morii, Takayuki Mizunaga, Yuuki Ohta, Masahiro Hirokane
  • Publication number: 20100238156
    Abstract: A display device, in at least one embodiment, includes: a gate driver including a plurality of shift register stages each provided so as to correspond to each row, the gate driver outputting a gate signal for turning on switching elements in the each row; and a source driver outputting a data signal in accordance with an image to be displayed. For a row (first row) located at an outermost position from which scanning by use of the gate signal starts, a dummy line is provided. The dummy line is driven by a gate start pulse inputted into a shift register in the first row.
    Type: Application
    Filed: August 28, 2008
    Publication date: September 23, 2010
    Applicant: NISSHA PRINTING CO., LTD.
    Inventors: Akihisa Iwamoto, Hideki Morii, Takayuki Mizunaga, Masahiro Hirokane, Yuuki Ohta
  • Publication number: 20100053136
    Abstract: In one embodiment of the present invention, a gradation voltage correction system is provided in a liquid crystal display device that is configured to be capable of displaying a color image, and corrects gradation voltages to be supplied to a plurality of pixels. The gradation voltage correction system includes a color sensor (chromaticity change acquiring portion) for acquiring a change in chromaticity of illumination light from light-emitting diodes and a correction determining portion for determining correction values for each color of the red, green, and blue pixels based on the detection (acquisition) results of the color sensor.
    Type: Application
    Filed: July 6, 2007
    Publication date: March 4, 2010
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Yuuki Ohta, Tetsuya Hamada
  • Publication number: 20090231513
    Abstract: An illuminating device achieves higher brightness by improving the utilization efficiency of light from a light source in an illuminating device for emitting plane-shaped light. The backlight device includes a light guide member, and LED units facing side surfaces of the light guide member, and propagates light that is emitted by the LEDs and made incident to the side surfaces in the light guide member so as to emit plane-shaped light from a first main surface of the light guide member. The backlight device includes an insulating reflective member placed outside a second main surface of the light guide member facing the first main surface, and a metal reflective sheet laminated on the insulating reflective sheet on the side opposite to the light guide member.
    Type: Application
    Filed: July 19, 2006
    Publication date: September 17, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yuuki Ohta, Tetsuya Hamada, Noriyuki Ohashi
  • Patent number: 7501786
    Abstract: In a stabilizer control apparatus for transmitting a power through a speed reducing mechanism, a rolling motion of a vehicle body is restrained smoothly and rapidly, without being affected by transmitting efficiency of the speed reducing mechanism. As for a stabilizer (SBf) including a pair of stabilizer bars (SBfr, SBfl) disposed between a right wheel and a left wheel, and a stabilizer actuator (FT) driven by an electric motor disposed between them, the electric motor M is controlled in response to a turning state of a vehicle, to control a torsional rigidity of the stabilizer. Furthermore, the apparatus comprises relative position detection means for detecting the relative position of the pair of stabilizer bars (for example, obtained from a relationship between a rotational angle of the electric motor and a reducing speed ratio), and it is so constituted that the electric motor is controlled in response to the detected result.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: March 10, 2009
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Yoshiyuki Yasui, Yuuki Ohta, Daisuke Yamada
  • Patent number: 7384047
    Abstract: In a stabilizer control apparatus for a vehicle, a stabilizer includes a pair of stabilizer bars disposed between a right wheel and a left wheel of the vehicle, and an actuator having an electric motor disposed between the stabilizer bars. A turning determination device is provided for determining a turning operation of the vehicle. And, a controller is provided for controlling the electric motor in response to the result determined by the turning determination device. The electric motor is substantially prohibited from being fed with electric current, when the turning operation of the vehicle is being decreased.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: June 10, 2008
    Assignees: Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshiyuki Yasui, Yuuki Ohta, Daisuke Yamada, Shuuichi Buma, Masaaki Kawashima
  • Publication number: 20070119644
    Abstract: In a stabilizer control apparatus for transmitting a power through a speed reducing mechanism, a rolling motion of a vehicle body is restrained smoothly and rapidly, without being affected by transmitting efficiency of the speed reducing mechanism. As for a stabilizer (SBf) including a pair of stabilizer bars (SBfr, SBfl) disposed between a right wheel and a left wheel, and a stabilizer actuator (FT) driven by an electric motor disposed between them, the electric motor M is controlled in response to a turning state of a vehicle, to control a torsional rigidity of the stabilizer. Furthermore, the apparatus comprises relative position detection means for detecting the relative position of the pair of stabilizer bars (for example, obtained from a relationship between a rotational angle of the electric motor and a reducing speed ratio), and it is so constituted that the electric motor is controlled in response to the detected result.
    Type: Application
    Filed: February 10, 2005
    Publication date: May 31, 2007
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Yoshiyuki Yasui, Yuuki Ohta, Daisuke Yamada
  • Patent number: 7220216
    Abstract: A lock-up clutch control device for controlling a lock-up clutch mechanism provided to a torque converter is including an estimator means for estimating a contact timing of a friction material included in the lock-up clutch mechanism during a driven state based on an engine rotational speed change when condition of the lock-up clutch mechanism is changed from a disengaging state to an engaging state.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: May 22, 2007
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventor: Yuuki Ohta
  • Publication number: 20050206100
    Abstract: In a stabilizer control apparatus for a vehicle, a stabilizer includes a pair of stabilizer bars disposed between a right wheel and a left wheel of the vehicle, and an actuator having an electric motor and a speed reducing mechanism disposed between the stabilizer bars. A desired torque for the electric motor is calculated on the basis of a vehicle behavior and a steering operation of a vehicle driver, and estimated is a torsional torque created on each end portion of each of the stabilizer bars mounted on the vehicle. According to a feedback controller, the electric motor is controlled in response to the result compared between the desired torque and the estimated torsional torque.
    Type: Application
    Filed: March 17, 2005
    Publication date: September 22, 2005
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Yuuki Ohta, Hiroaki Kato
  • Publication number: 20050179220
    Abstract: In a stabilizer control apparatus for a vehicle, a stabilizer includes a pair of stabilizer bars disposed between a right wheel and a left wheel of the vehicle, and an actuator having an electric motor disposed between the stabilizer bars. A turning determination device is provided for determining a turning operation of the vehicle. And, a controller is provided for controlling the electric motor in response to the result determined by the turning determination device. The electric motor is substantially prohibited from being fed with electric current, when the turning operation of the vehicle is being decreased.
    Type: Application
    Filed: February 14, 2005
    Publication date: August 18, 2005
    Applicants: AISIN SEIKI KABUSHIKI KAISHA, TOYOYA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshiyuki Yasui, Yuuki Ohta, Daisuke Yamada, Shuuichi Buma, Masaaki Kawashima
  • Publication number: 20050096182
    Abstract: A lock-up clutch control device for controlling a lock-up clutch mechanism provided to a torque converter is including an estimation means for estimating a contact timing of a friction material included in the lock-up clutch mechanism during a driven state based on an engine rotational speed change when condition of the lock-up clutch mechanism is changed from a disengaging state to an engaging state.
    Type: Application
    Filed: October 26, 2004
    Publication date: May 5, 2005
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventor: Yuuki Ohta
  • Patent number: 6782984
    Abstract: A control method of a lockup clutch includes eliminating a loss stroke of a piston by a pre-charge of a supplied hydraulic pressure, increasing a force applied to the piston by further supply of the hydraulic pressure after the pre-charge, controlling a slip rotation speed between a pump impeller and a turbine runner in a torque converter connected to an automatic transmission, and determining a time for performing the pre-charge when a shift stage of the automatic transmission is under a neutral state and a vehicle is substantially stopped.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: August 31, 2004
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Kazutoshi Tsunekawa, Yuuki Ohta
  • Patent number: 6746369
    Abstract: A control device for a lock-up mechanism arranged parallel with a hydraulic type torque transmitting mechanism that transmits rotatory power of a pump impeller connected with an output shaft of an engine to a turbine impeller connected with a wheel side element. The lock-up mechanism controls a slip value between the rotational speeds of the pump and turbine impellers in response to supplied hydraulic pressure. The control device calculates a target slip value, detects an actual slip value based on the rotational speed difference of the pump and turbine impellers, sets an intermediate slip value between the actual and target slip values, controls the hydraulic pressure to the lock-up mechanism so that the actual and intermediate slip values coincide, and reduces the intermediate slip value to a renewed value closer to the target slip value than the intermediate slip value when the actual slip value reaches the intermediate slip value.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: June 8, 2004
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Kazutoshi Tsunekawa, Yuuki Ohta, Keisuke Kurokawa
  • Publication number: 20040029672
    Abstract: A control method of a lockup clutch includes eliminating a loss stroke of a piston by a pre-charge of a supplied hydraulic pressure, increasing a force applied to the piston by further supply of the hydraulic pressure after the pre-charge, controlling a slip rotation speed between a pump impeller and a turbine runner in a torque converter connected to an automatic transmission, and determining a time for performing the pre-charge when a shift stage of the automatic transmission is under a neutral state and a vehicle is substantially stopped.
    Type: Application
    Filed: March 13, 2003
    Publication date: February 12, 2004
    Applicant: Aisin Seiki Kabushiki Kaisha
    Inventors: Kazutoshi Tsunekawa, Yuuki Ohta
  • Patent number: 6577750
    Abstract: A clean garment is provided with inherent identification data. A measuring part measures the cleanliness of the clean garment and outputs the obtained measurement data. An identification data input part reads the identification data of the clean garment and outputs it as an identification data. At least the previous measurement data is stored in a data base in association with the identification data. A signal processing part receives the measurement data and identification data. In the signal processing part, the previous measurement data of the clean garment is read from the data base based on the received identification data C, to calculate the difference (increment) between the now obtained measurement data and the previous measurement data, and the obtained difference is referenced to a predetermined criterion, to judge the cleanliness of the clean garment. The cleanliness of clean garments can be managed per clean garment by a clean garment managing system.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: June 10, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yuuki Ohta, Michio Kuniya
  • Publication number: 20020040622
    Abstract: A control device for a lock-up mechanism arranged parallel with a hydraulic type torque transmitting mechanism that transmits rotatory power of a pump impeller connected with an output shaft of an engine to a turbine impeller connected with a wheel side element. The lock-up mechanism controls a slip value between the rotational speeds of the pump and turbine impellers in response to supplied hydraulic pressure. The control device calculates a target slip value, detects an actual slip value based on the rotational speed difference of the pump and turbine impellers, sets an intermediate slip value between the actual and target slip values, controls the hydraulic pressure to the lock-up mechanism so that the actual and intermediate slip values coincide, and reduces the intermediate slip value to a renewed value closer to the target slip value than the intermediate slip value when the actual slip value reaches the intermediate slip value.
    Type: Application
    Filed: October 1, 2001
    Publication date: April 11, 2002
    Inventors: Kazutoshi Tsunekawa, Yuuki Ohta, Keisuke Kurokawa