Patents by Inventor Hiroshi Yaguma

Hiroshi Yaguma 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: 20240310854
    Abstract: An autonomous moving apparatus is an apparatus that autonomously moves toward a target object set in advance, and includes a plurality of radio wave receiving units that receive a radio wave transmitted from the autonomous moving apparatus or an external device, a radio wave prevention unit that blocks or absorbs a radio wave from a predetermined direction when viewed from the radio wave receiving units, a movement direction setting unit that sets a movement direction of the autonomous moving apparatus based on a measurement result by the plurality of radio wave receiving units, and an operation control unit that controls the autonomous moving apparatus to travel in the movement direction set by the movement direction setting unit.
    Type: Application
    Filed: May 29, 2024
    Publication date: September 19, 2024
    Inventors: Hiroshi YAGUMA, Masahiro YASUDA
  • Publication number: 20230384444
    Abstract: The autonomous movement device includes: an reception unit that is an antenna unit configured to receive output information; an angle estimation unit configured to estimate an arrival direction of the output information; a reception strength determination unit configured to determine a reception strength of the output information in the estimated arrival direction; an operation control unit configured generate movement direction information including a movement direction for moving an autonomous movement device, according to the estimated arrival direction and a magnitude of or a change in the reception strength; and a drive unit configured to generate drive information corresponding to the movement direction information.
    Type: Application
    Filed: August 10, 2023
    Publication date: November 30, 2023
    Applicant: ROHM CO., LTD.
    Inventors: Hiroshi YAGUMA, Masahiro YASUDA
  • Publication number: 20230042935
    Abstract: Disclosed is a transmission element imaging device capturing an image of a transmission element that transmits a signal, including a reception element group including a plurality of reception elements each receiving the signal transmitted from the transmission element, a direction detection unit detecting a direction of the transmission element on a basis of the signal received by each of the plurality of reception elements, a camera whose relative positional relation with the reception element group is determined and which captures an image in the direction of the transmission element, and an image processing unit generating an image in which a marker indicating the direction of the transmission element is added to the image captured by the camera.
    Type: Application
    Filed: August 3, 2022
    Publication date: February 9, 2023
    Inventors: Hiroshi Yaguma, Mashiro Yasuda
  • Publication number: 20220402605
    Abstract: Provided is a flight control apparatus including a pair of sensors that are spaced apart in a vertical direction on a surface of a flying object which uses motive power of a power source powered by a battery to fly and that detect a physical quantity corresponding to a state of an airflow, and a control unit that controls a flight state of the flying object on the basis of a difference between outputs of the pair of sensors.
    Type: Application
    Filed: June 15, 2022
    Publication date: December 22, 2022
    Inventors: Hiroshi Yaguma, Shinsuke Akasaka
  • Patent number: 8970460
    Abstract: A voltage amplifier circuit (300) comprises: an input voltage generating unit (302) that generates an input voltage (VL1) based on a set value (SL); an operational amplifier (303) that amplifies the input voltage (VL1) such that the input voltage (VL1) becomes equal to a feedback voltage (VL3), thereby generating an output voltage (VL2); a feedback resistor unit (304) that performs a voltage division between the output voltage (VL2) applied to one end of the feedback resistor unit and a reference voltage (VL4) applied to the other end of the feedback resistor unit, thereby generating the feedback voltage (VL3); a selector control unit (305) that generates a selector control signal (SS) based on the set value (SL); and a selector (306) that selects, based on the selector control signal SS, the reference voltage (VL4) from a plurality of candidates (GND/VR).
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: March 3, 2015
    Assignee: Rohm Co., Ltd.
    Inventors: Hiroshi Yaguma, Motoya Kumagai, Takashi Nagai, Sukenori Itou
  • Patent number: 8368679
    Abstract: A power supply apparatus of the present invention comprises: a constant voltage generation section (first DAC (21), second DAC (22), resistor (R2), resistor (R3)) that generates a positive constant voltage (Va); a pulse voltage generation section (pulse oscillator (23), amplifier (24)) that generates a positive pulse voltage (Vb); a capacitor (C1) of which one end is connected to the output terminal of the pulse voltage generation section; and a diode (D1) of which an anode is connected to the other end of the capacitor (C1), and of which a cathode is connected to the output terminal of the constant voltage generation section. A positive-negative bipolar pulse voltage (Vc) is outputted from the other end of the capacitor (C1). Thus, it is possible to generate a positive-negative bipolar pulse voltage with a simple and small-scale circuit configuration.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: February 5, 2013
    Assignee: Rohm Co., Ltd.
    Inventors: Hiroshi Yaguma, Hiromitsu Nakaoka
  • Publication number: 20120113340
    Abstract: The liquid crystal display panel according to the present invention comprises a plurality of gate lines, a plurality of source lines, and a plurality of liquid crystal pixels, wherein the plurality of source lines and the plurality of liquid crystal pixels are laid out so that the polarity of voltage to be applied to the plurality of liquid crystal pixels is inverted for individual dots for the liquid crystal display panel overall, and so that the polarity of voltage to be applied to the plurality of source lines is not inverted for at least an entire row scan interval.
    Type: Application
    Filed: November 9, 2011
    Publication date: May 10, 2012
    Applicant: ROHM CO., LTD.
    Inventors: Hiroshi Yaguma, Makoto Kitagawa
  • Publication number: 20110141098
    Abstract: A voltage amplifier circuit (300) comprises: an input voltage generating unit (302) that generates an input voltage (VL1) based on a set value (SL); an operational amplifier (303) that amplifies the input voltage (VL1) such that the input voltage (VL1) becomes equal to a feedback voltage (VL3), thereby generating an output voltage (VL2); a feedback resistor unit (304) that performs a voltage division between the output voltage (VL2) applied to one end of the feedback resistor unit and a reference voltage (VL4) applied to the other end of the feedback resistor unit, thereby generating the feedback voltage (VL3); a selector control unit (305) that generates a selector control signal (SS) based on the set value (SL); and a selector (306) that selects, based on the selector control signal SS, the reference voltage (VL4) from a plurality of candidates (GND/VR).
    Type: Application
    Filed: March 31, 2010
    Publication date: June 16, 2011
    Applicant: Rohm Co., Ltd.
    Inventors: Hiroshi Yaguma, Motoya Kumagai, Takashi Nagai, Sukenori Itou
  • Publication number: 20100182296
    Abstract: A power supply apparatus of the present invention comprises: a constant voltage generation section (first DAC (21), second DAC (22), resistor (R2), resistor (R3)) that generates a positive constant voltage (Va); a pulse voltage generation section (pulse oscillator (23), amplifier (24)) that generates a positive pulse voltage (Vb); a capacitor (C1) of which one end is connected to the output terminal of the pulse voltage generation section; and a diode (D1) of which an anode is connected to the other end of the capacitor (C1), and of which a cathode is connected to the output terminal of the constant voltage generation section. A positive-negative bipolar pulse voltage (Vc) is outputted from the other end of the capacitor (C1). Thus, it is possible to generate a positive-negative bipolar pulse voltage with a simple and small-scale circuit configuration.
    Type: Application
    Filed: September 4, 2007
    Publication date: July 22, 2010
    Applicant: Rohm Co., Ltd.
    Inventors: Hiroshi Yaguma, Hiromitsu Nakaoka
  • Patent number: 7615932
    Abstract: An organic EL display device having an organic EL drive circuit has a reference current generation circuit that switches the column line drive in response to changing of the dot arrangement of R, G and B through changeover switch circuits. Three D/A converter blocks constituted by a plurality of switch circuits and a plurality of output side transistors of a current mirror circuit are provided to produce reference currents for R, G and B that are selectively switched by a first, a second and a third changeover switch circuit. As a result, the D/A converter blocks corresponding to the respective terminal pins dynamically produce drive currents for the respective terminal pins so as to correspond to the dot arrangement of R, G and B on the organic EL panel.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: November 10, 2009
    Assignee: Rohm Co., Ltd.
    Inventors: Shinichi Abe, Hiroshi Yaguma
  • Patent number: 7586469
    Abstract: A current inputted from a first input terminal and a reference current generated by an internal reference current generator circuit, which are in phase, are inputted to a reference current selector circuit by which either the inputted current or the reference current is selected. The selected current is temporarily phase-inverted by a current inverter circuit and drives a current mirror circuit of a current distributor circuit (or a reference current regulator circuit) for duplicating the reference current and distributing them. Currents, each of which is in phase with the reference current or the inputted current and has same current value as that of the reference current or the inputted current, can be generated in the output side transistors of the current mirror circuit.
    Type: Grant
    Filed: May 12, 2005
    Date of Patent: September 8, 2009
    Assignee: Rohm Co., Ltd.
    Inventors: Masanori Fujisawa, Shinichi Abe, Hiroshi Yaguma
  • Publication number: 20090219307
    Abstract: A liquid crystal driver performs inversion driving of a plurality of data lines of a liquid crystal panel. A source driver generates a driving voltage in accordance with the brightness data indicating the brightness of a pixel, and supplies the driving voltage to the corresponding data line. A common electrode driver supplies an alternating-current common voltage to a common electrode of the liquid crystal panel. A reference voltage generating circuit includes a plurality of resistors that are connected in series between a power supply terminal and a ground terminal, and generates a plurality of reference voltages that are generated at a plurality of taps disposed at connection points of adjacent resistors. The source driver generates the driving voltage by using any one voltage selected from the plurality of reference voltages. The common electrode driver generates the common voltage by using any one voltage selected from the plurality of reference voltages.
    Type: Application
    Filed: December 29, 2008
    Publication date: September 3, 2009
    Applicant: ROHM CO., LTD.
    Inventors: Hiroshi Yaguma, Kousuke Itani
  • Publication number: 20090213104
    Abstract: A plurality of source amplifiers, arranged for each of a plurality of data lines, generate a drive voltage corresponding to brightness data indicating pixel brightness, to supply corresponding data lines. An output terminal of each source amplifier is connected to a corresponding data line. A high side transistor is arranged between a power supply line and the output terminal, and a low side transistor is arranged between a ground line and the output terminal. A first capacitor is arranged between the output terminal and a gate of the high side transistor, and a second capacitor is arranged between the output terminal and a gate of the low side transistor. Respective pads that function as the output terminal of each of the source amplifiers are disposed along one side of a semiconductor substrate in which a source driver is integrated. The first capacitor and the second capacitor are disposed along one side, at positions adjacent to the pads.
    Type: Application
    Filed: December 29, 2008
    Publication date: August 27, 2009
    Applicant: ROHM CO., LTD.
    Inventors: Hiroshi Yaguma, Akio Kamimurai
  • Patent number: 7580013
    Abstract: An organic EL drive circuit includes a reset voltage generator circuit for generating a predetermined constant voltage for constant voltage resetting, reset switches provided between an output of the reset voltage generator circuit and terminal pins of an organic EL display panel and ON/OFF controlled by one of the timing control signal, a reset control signal similar to the timing control signal, a reset pulse, other pulse generated in the reset period in synchronism with these signal, and the pulse and an output terminal for outputting the predetermined constant voltage to other organic EL drive circuits, which have identical circuit constructions to that of the organic EL drive circuit and arranged adjacently to the organic EL drive circuit, as a voltage for constant voltage resetting.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: August 25, 2009
    Assignee: Rohm Co., Ltd.
    Inventors: Hiroshi Yaguma, Shinichi Abe, Masato Kobayashi
  • Patent number: 7570234
    Abstract: A first input terminal and a second input terminal of an organic EL drive circuit IC are arranged on both sides of the organic EL drive circuit IC, which are contiguous to sides of a plurality of IC's having identical circuit constructions to the organic EL drive circuit IC and arranged contiguously to the organic EL drive circuit IC, and a first output terminal and a second output terminal of the organic EL drive circuit IC are provided similarly.
    Type: Grant
    Filed: June 24, 2005
    Date of Patent: August 4, 2009
    Assignee: Rohm Co., Ltd.
    Inventor: Hiroshi Yaguma
  • Patent number: 7515124
    Abstract: An amplifier circuit for generating a predetermined constant voltage required for resetting organic EL elements or capacitors is provided and an operating current switching circuit switches the operating current of the amplifier circuit to an idling current in a display period and to a steady operation current required to performing a reset operation in a reset period, so that a shifting time of the amplifier circuit from the idling state to the steady operation state can be shortened and a constant control voltage for resetting the organic EL elements or the capacitors can be generated in an initial portion of the reset period.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: April 7, 2009
    Assignee: Rohm Co., Ltd.
    Inventors: Hiroshi Yaguma, Masato Kobayashi
  • Publication number: 20080272710
    Abstract: An organic EL display device having an organic EL drive circuit has a reference current generation circuit that switches the column line drive in response to changing of the dot arrangement of R, G and B through changeover switch circuits. Three D/A converter blocks constituted by a plurality of switch circuits and a plurality of output side transistors of a current mirror circuit are provided to produce reference currents for R, G and B that are selectively switched by a first, a second and a third changeover switch circuit. As a result, the D/A converter blocks corresponding to the respective terminal pins dynamically produce drive currents for the respective terminal pins so as to correspond to the dot arrangement of R, G and B on the organic EL panel.
    Type: Application
    Filed: November 16, 2005
    Publication date: November 6, 2008
    Inventors: Shinichi Abe, Hiroshi Yaguma
  • Patent number: 7372439
    Abstract: A first current mirror circuit including an input side transistor, an output transistor and passive elements respectively connected in series with said input side transistor and said output side transistor, temperature coefficients of said passive elements being opposite in characteristics and a second current mirror circuit provided as a load circuit of the first current mirror circuit, for feeding back an output current of the output side transistor to an input of the input side transistor are provided. A drive current is generated on a basis of a current corresponding to a current generated in the output side transistor as a reference current and an operating current ratio of the input side transistor and the output side transistor is selected such that luminance change of organic EL elements with respect to temperature change is restricted.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: May 13, 2008
    Assignee: Rohm Co., Ltd.
    Inventors: Hiroshi Yaguma, Masanori Fujisawa, Shinichi Abe
  • Patent number: 7321347
    Abstract: An organic EL drive circuit comprises a timing signal generator circuit for generating a plurality of second timing control signals sequentially delayed from a first timing control signal, a reset pulse generator circuit for selecting one of the plurality of the second timing control signals according to the predetermined data and generating a reset pulse having a front edge determined according to the selected second timing control signal and a rear edge determined by the first timing control signal and a switch circuit responsive to the reset pulse for connecting the terminal pins to a predetermined bias line to reset an organic EL element of an organic EL panel connected to the terminal pins. Luminance of the organic EL panel is regulated by regulating the display period according to the predetermined data.
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: January 22, 2008
    Assignee: Rohm Co., Ltd.
    Inventors: Hiroshi Yaguma, Shinichi Abe, Jun Maede, Akio Fujikawa
  • Publication number: 20070132672
    Abstract: [Problem]To provide an organic EL drive circuit and an organic EL display device, capable of restricting an area taken by gamma correction circuits provided correspondingly to terminal pins. [Means for Solving the Problem]An organic EL drive circuit includes switch circuits for connecting the terminal pins to a predetermined potential line according to a reset pulse, a correction data generator circuit for generating correction data for correcting a light emitting period of the organic EL element according to display data for gamma correction of luminance of the organic EL element and a reset pulse generator circuit for generating the reset pulse having pulse width corresponding to the gamma correction according to the first timing control signal and the correction data.
    Type: Application
    Filed: March 22, 2005
    Publication date: June 14, 2007
    Inventors: Jun Maede, Hiroshi Yaguma, Shinichi Abe, Akio Fujikawa