Patents by Inventor Daisuke Hirono
Daisuke Hirono 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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Publication number: 20240080179Abstract: A signal determination device includes an identification unit which identifies a reference signal that serves as a reference to identify an abnormal signal among a plurality of signals detected in the communication network, a time interval estimation unit which estimates a time interval of signals that are to be input in series to the communication network based on detection timing of the plurality of signals detected in the communication network, a timing estimation unit which estimates timing at which a plurality of signals is to be detected in the communication network after the reference signal, and a determination unit which determines whether each of the plurality of signals detected in the communication network after the reference signal is a normal signal based on the timing estimated by the timing estimation unit and detection timing of the plurality of signals detected in the communication network after the reference signal.Type: ApplicationFiled: August 30, 2023Publication date: March 7, 2024Inventors: Daisuke SAITO, Yuki HIRONO, Yuichi OHTOMO, Yuta NAKATA
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Publication number: 20240080331Abstract: An abnormality determination apparatus that includes: a judgement unit which judges, based on detection timings of multiple signals in the communication network, whether each of the multiple signals is either a normal signal or an abnormal signal; and a determination unit which determines, if there is detected a signal judged as the abnormal signal, a type of abnormality having occurred in the communication network based on distribution of detection timings of multiple signals detected at a timing at which the signal judged as the abnormal signal is detected in the communication network or later. Here, each of the multiple signals is judged as the normal signal or the abnormal signal.Type: ApplicationFiled: August 30, 2023Publication date: March 7, 2024Inventors: Daisuke SAITO, Yuki HIRONO
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Publication number: 20230324768Abstract: [Problem] Provided are a lens drive module, an imaging module, an electronic device, and a lens unit that have a simple configuration and are advantageous in reducing power consumption. [Solution to Problem] The lens drive module includes: a lens unit that includes a plurality of lenses and a spacer that includes a ferromagnetic material provided between two adjacent lenses among the plurality of lenses; and a lens actuator that causes an electromagnetic force to act on the lens unit in response to energization.Type: ApplicationFiled: August 18, 2021Publication date: October 12, 2023Inventors: KATSUJI KIMURA, TAKAYUKI KUNIMITSU, KOHEI IMAYOSHI, TAKAHIRO TSURUTA, ISAO YAMAMOTO, HIDEAKI OKANO, DAISUKE HIRONO
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Patent number: 11566939Abstract: A measurement device according to an embodiment includes: a light receiving element (1000) that has flow of current caused by an avalanche multiplication caused according to a photon incidence while being charged to a predetermined potential and is returned to the charged state by a recharge current, a detection unit (1002) that is configured to detect the current and invert an output signal when the current crosses a threshold value, a delay unit (2101, 2102) that is configured to delay timing of the inversion detected by the detection unit, according to a clock, and a control unit (201a) that is configured to control an operation of the light receiving element, based on the timing of the inversion delayed by the delay unit.Type: GrantFiled: February 18, 2020Date of Patent: January 31, 2023Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATIONInventor: Daisuke Hirono
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Patent number: 11444622Abstract: A proximity sensor that detects the distance between two coils is disclosed. In one example, the proximity sensor includes a reference signal generation circuit, a first coil, a second coil, a clock signal generation circuit, and a switched capacitor circuit. The reference signal generation circuit applies a first alternating voltage to the first coil and transmits a reference signal synchronized with the first alternating voltage to the clock signal generation circuit. The second coil is coupled with the first coil by magnetic field coupling to generate a second alternating voltage correlated with a coupling coefficient. The clock signal generation circuit transmits clock signals corresponding to the reference signal to the switched capacitor circuit, and the switched capacitor circuit detects a distance between the first coil and the second coil by acquiring the second alternating voltage at a timing when each of the clock signals changes.Type: GrantFiled: December 18, 2019Date of Patent: September 13, 2022Assignee: Sony Semiconductor Solutions CorporationInventors: Daisuke Hirono, Katsuji Kimura, Yuki Urano
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Patent number: 11336213Abstract: Provided is a motor control device having a function for determining a rotor position of a synchronous motor, without use of a sensor, the device prevents obtaining an erroneous rotor position, to enable stable control of the synchronous motor based on the rotor position in both the normal-control region and the flux-weakening-control region.Type: GrantFiled: January 21, 2019Date of Patent: May 17, 2022Assignee: Sanden Automotive Components CorporationInventors: Masafumi Hotta, Daisuke Hirono
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Publication number: 20220136896Abstract: A measurement device according to an embodiment includes: a light receiving element (1000) that has flow of current caused by an avalanche multiplication caused according to a photon incidence while being charged to a predetermined potential and is returned to the charged state by a recharge current, a detection unit (1002) that is configured to detect the current and invert an output signal when the current crosses a threshold value, a delay unit (2101, 2102) that is configured to delay timing of the inversion detected by the detection unit, according to a clock, and a control unit (201a) that is configured to control an operation of the light receiving element, based on the timing of the inversion delayed by the delay unit.Type: ApplicationFiled: February 18, 2020Publication date: May 5, 2022Inventor: DAISUKE HIRONO
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Publication number: 20220120898Abstract: A control circuit according to the present disclosure includes first wiring (10) to which a first power supply voltage (Vdd1) is applied, second wiring (20) to which a second power supply voltage (Vdd2) lower than the first power supply voltage (Vdd1) is applied, a current supply unit (20) configured to supply a predetermined current from the first wiring (10) to a SPAD element (6a), a first withstand voltage unit (40) configured to hold a lower voltage side of the current supply unit (20) at a voltage equal to or above the second power supply voltage (Vdd2), an inverter (60) connected to a cathode of the SPAD element (6a), and a second withstand voltage unit (50) that is configured to hold the inverter (60) at a voltage equal to or below the second power supply voltage (Vdd2), and includes an N-type first transistor that is provided between the cathode of the SPAD element (6a) and an input terminal of the inverter (60), and has a gate connected to the second wiring (11), and a P-type second transistor that iType: ApplicationFiled: December 17, 2019Publication date: April 21, 2022Inventors: HAYATO KAMIZURU, DAISUKE HIRONO
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Patent number: 11303234Abstract: Provided is a motor control device having a function for determining a rotor position of a synchronous motor, without use of a sensor, the device prevents obtaining an erroneous rotor position, to enable stable control of the synchronous motor based on the rotor position in both the normal-control region and the flux-weakening-control region.Type: GrantFiled: January 21, 2019Date of Patent: April 12, 2022Assignee: SANDEN AUTOMOTIVE COMPONENTS CORPORATIONInventors: Masafumi Hotta, Daisuke Hirono
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Publication number: 20220059716Abstract: The control circuit according to the present disclosure includes a passive circuit (10) and an active circuit (20). The passive circuit (10) is configured to: supply current to a Single Photon Avalanche Diode (SPAD) element (6a) from a supply path (Rp); and output a first pulse signal (P1) according to a signal Generated in the SPAD element (6a). The active circuit (20) is configured to: supply current to the SPAD element (6a) selectively from among a plurality of supply paths; and output a second pulse signal (P2) according to a signal generated in the SPAD element (6a).Type: ApplicationFiled: December 13, 2019Publication date: February 24, 2022Inventors: Hayato Kamizuru, Daisuke Hirono
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Publication number: 20220021386Abstract: A proximity sensor that detects the distance between two coils is disclosed. In one example, the proximity sensor includes a reference signal generation circuit, a first coil, a second coil, a clock signal generation circuit, and a switched capacitor circuit. The reference signal generation circuit applies a first alternating voltage to the first coil and transmits a reference signal synchronized with the first alternating voltage to the clock signal generation circuit. The second coil is coupled with the first coil by magnetic field coupling to generate a second alternating voltage correlated with a coupling coefficient. The clock signal generation circuit transmits clock signals corresponding to the reference signal to the switched capacitor circuit, and the switched capacitor circuit detects a distance between the first coil and the second coil by acquiring the second alternating voltage at a timing when each of the clock signals changes.Type: ApplicationFiled: December 18, 2019Publication date: January 20, 2022Inventors: Daisuke Hirono, Katsuji Kirnura, Yuki Urano
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Publication number: 20210293958Abstract: A time measurement device according to the present disclosure includes: a pixel that includes a light receiving element and a delay circuit having a variable delay time, is configured to output, as an output signal, a pulse signal that includes a received-light pulse having a pulse width corresponding to the delay time in a first operation mode, and is configured to have a ring oscillator with use of the delay circuit and configured to output, as the output signal, an oscillation signal in the ring oscillator in a second operation mode; and a time measurement section that is configured to perform time measurement processing on the basis of the output signal.Type: ApplicationFiled: June 12, 2019Publication date: September 23, 2021Inventor: DAISUKE HIRONO
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Publication number: 20200403540Abstract: Provided is a motor control device having a function for determining a rotor position of a synchronous motor, without use of a sensor, the device prevents obtaining an erroneous rotor position, to enable stable control of the synchronous motor based on the rotor position in both the normal-control region and the flux-weakening-control region.Type: ApplicationFiled: January 21, 2019Publication date: December 24, 2020Inventors: Masafumi HOTTA, Daisuke HIRONO
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Publication number: 20200373862Abstract: Provided is a motor control device having a function for determining a rotor position of a synchronous motor, without use of a sensor, the device prevents obtaining an erroneous rotor position, to enable stable control of the synchronous motor based on the rotor position in both the normal-control region and the flux-weakening-control region.Type: ApplicationFiled: January 21, 2019Publication date: November 26, 2020Inventors: Masafumi HOTTA, Daisuke HIRONO
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Patent number: 10778129Abstract: In a motor control device, a voltage phase detecting unit sets a voltage phase of applied voltage to be applied to a motor based on a deviation between a target d-axis current set by a target d-axis current setting unit and an actual d-axis current detected by a rotor position detecting unit and an actual rotational speed detected by a rotational speed detecting unit. Here, a correction amount calculating unit determines whether or not a rotor has rotated by one period of mechanical angle based on the rotor position detected by the rotor position detecting unit and calculates an average value of deviations between target d-axis current and actual d-axis current in each period of mechanical angle as a correction amount, and a second addition/subtraction unit corrects a target d-axis current by a correction amount.Type: GrantFiled: January 12, 2017Date of Patent: September 15, 2020Assignee: SANDEN AUTOMOTIVE COMPONENTS CORPORATIONInventors: Masafumi Hotta, Daisuke Hirono
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Publication number: 20200204098Abstract: In a motor control device, a voltage phase detecting unit sets a voltage phase of applied voltage to be applied to a motor based on a deviation between a target d-axis current set by a target d-axis current setting unit and an actual d-axis current detected by a rotor position detecting unit and an actual rotational speed detected by a rotational speed detecting unit. Here, a correction amount calculating unit determines whether or not a rotor has rotated by one period of mechanical angle based on the rotor position detected by the rotor position detecting unit and calculates an average value of deviations between target d-axis current and actual d-axis current in each period of mechanical angle as a correction amount, and a second addition/subtraction unit corrects a target d-axis current by a correction amount.Type: ApplicationFiled: January 12, 2017Publication date: June 25, 2020Inventors: Masafumi HOTTA, Daisuke HIRONO
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Patent number: 10686460Abstract: The present invention aims to reduce power consumption in an ADC that performs AD conversion of a single-ended signal. A pair of sampling capacitors samples the single-ended signal. After the single-ended signal has been sampled, the connection control unit performs positive-side connection control of connecting both ends of one of the pair of sampling capacitors across a positive-side signal line and a predetermined ground potential and performs negative-side connection control of connecting both ends of the other of the pair of sampling capacitors across a negative-side signal line and the predetermined ground potential. A conversion unit converts a differential signals from the positive-side signal line and the negative-side signal line that have respectively undergone the positive-side connection control and the negative-side connection control into a digital signal.Type: GrantFiled: July 7, 2017Date of Patent: June 16, 2020Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATIONInventors: Taiki Iguchi, Shinichirou Etou, Yosuke Ueno, Daisuke Hirono
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Publication number: 20200186011Abstract: An abnormality detecting device for a current sensor detecting whether a single current sensor provided in an inverter which supplies electric power to a motor driving a compressor is abnormal detects phase currents of the motor based on an output signal of the current sensor, estimates an estimated phase current value of the phase currents of the motor based on at least one of a discharge pressure and a suction pressure of the compressor and a rotational speed of the motor, compares detected values of the phase currents with an estimated phase current value of the phase currents, and then detects whether the current sensor is abnormal based on the comparison result.Type: ApplicationFiled: January 12, 2017Publication date: June 11, 2020Inventors: Takeo TSUKAMOTO, Daisuke HIRONO
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Patent number: 10516354Abstract: To provide a motor control device capable of determining a rotor position with high accuracy not only in normal control but also in flux-weakening control.Type: GrantFiled: February 24, 2017Date of Patent: December 24, 2019Assignee: Sanden Automotive Components CorporationInventors: Takeo Tsukamoto, Masafumi Hotta, Daisuke Hirono
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Publication number: 20190207508Abstract: An inverter device that generates an AC voltage from a DC voltage and drives an electric motor 2 includes: smoothing capacitors 3 for reducing the ripple voltage superimposed on the DC voltage; an inverter circuit 4 having a plurality of switching elements 40u to 40w, 41u to 41w; and a control unit 5 for controlling operation of the plurality of switching elements 40u to 40w, 41u to 41w of the inverter circuit 4. When an open fault has occurred in the smoothing capacitors 3, the control unit 5 limits the electric current flowing through the electric motor 2 by controlling the operation of the plurality of switching elements 40u to 40w, 41u to 41w.Type: ApplicationFiled: November 29, 2016Publication date: July 4, 2019Inventors: Takeo TSUKAMOTO, Daisuke HIRONO