Patents by Inventor Tomoya Morinaga
Tomoya Morinaga 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: 10509115Abstract: A position estimation method includes: acquiring, from plural receivers that receive a plural received signal strengths of radio waves transmitted from a transmitter and transmit the plural received signal strengths, the plural received signal strengths; and in a case in which a plural distances between the transmitter and the plural receivers are calculated based on the plural received signal strengths, and a position of the transmitter is estimated by using the plural distances, and in a case in which a distance among the plural distances is smaller than a predetermined threshold, performing a first correction processing by estimating a position of a receiver corresponding to the distance smaller than the threshold as a position of the transmitter.Type: GrantFiled: April 19, 2018Date of Patent: December 17, 2019Assignee: LAPIS SEMICONDUCTOR CO., LTD.Inventor: Tomoya Morinaga
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Patent number: 10291078Abstract: A transmission antenna includes a resonance capacitor and a transmission coil coupled in series. A driver includes a bridge circuit that applies a driving voltage to the transmission antenna. A current sensor detects a current IS that flows through the bridge circuit. A foreign object detector detects the current IS that flows through the bridge circuit while changing the switching frequency applied to the bridge circuit. The foreign object detector judges the presence or absence of a foreign object based on the detection result.Type: GrantFiled: September 6, 2017Date of Patent: May 14, 2019Assignee: ROHM CO., LTD.Inventors: Masatoshi Watanabe, Tomoya Morinaga
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Publication number: 20180306910Abstract: A position estimation method includes: acquiring, from plural receivers that receive a plural received signal strengths of radio waves transmitted from a transmitter and transmit the plural received signal strengths, the plural received signal strengths; and in a case in which a plural distances between the transmitter and the plural receivers are calculated based on the plural received signal strengths, and a position of the transmitter is estimated by using the plural distances, and in a case in which a distance among the plural distances is smaller than a predetermined threshold, performing a first correction processing by estimating a position of a receiver corresponding to the distance smaller than the threshold as a position of the transmitter.Type: ApplicationFiled: April 19, 2018Publication date: October 25, 2018Inventor: TOMOYA MORINAGA
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Patent number: 10110066Abstract: A wireless power transmitter transmitting a power signal to a wireless power receiver, includes: a transmission antenna; an inverter circuit applying an AC driving signal to the transmission antenna; and a control circuit controlling the inverter circuit. The control circuit includes: a demodulator demodulating a control signal received by the transmission antenna from the wireless power receiver; a transmission power measurement part measuring transmission power to generate transmission power data; and a logic circuit that controls the inverter circuit based on power control data included in the control signal to change the transmission power, control the inverter circuit based on the control signal to be transmitted to the wireless power receiver to modulate the power signal, and perform foreign object detection by a power loss method based on transmission power data and reception power data included in the control signal. The logic circuit is configured to perform a calibration sequence.Type: GrantFiled: September 26, 2016Date of Patent: October 23, 2018Assignee: ROHM CO., LTD.Inventors: Masatoshi Watanabe, Tomoya Morinaga
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Patent number: 9929604Abstract: A transmission antenna includes a transmission coil, and transmits an electric power signal. A driver applies a driving signal to the transmission antenna. A first temperature sensor measures the temperature of the transmission coil, and generates a first temperature signal. A second temperature sensor measures the temperature of an interface surface on which an electronic device mounting a wireless power receiving apparatus is to be placed, and generates a second temperature signal. A control circuit controls the electric power signal according to the difference between the first temperature signal S11 and the second temperature signal.Type: GrantFiled: December 28, 2015Date of Patent: March 27, 2018Assignee: ROHM CO., LTD.Inventors: Masatoshi Watanabe, Tomoya Morinaga
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Patent number: 9893568Abstract: A wireless power transmitter for transmitting a power signal to a wireless power receiver is disclosed. The transmitter includes a transmission antenna, an inverter circuit including a plurality of switches; and a control circuit configured to demodulate a control signal received by the transmission antenna from the transmitter and control the inverter circuit based on power control data included in the control signal. The control circuit is configured to select among a first, second and third mode. For example, in the first mode in which a first pair including first and second switches and a second pair including third and fourth switches are both complementarily switched at a duty ratio of 50%, and a phase difference of the first pair and the second pair is changed between a minimum value and a maximum value depending on a transmission power, and the inverter circuit performs a full-bridge operation.Type: GrantFiled: October 11, 2016Date of Patent: February 13, 2018Assignee: Rohm Co., Ltd.Inventors: Masatoshi Watanabe, Tomoya Morinaga
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Publication number: 20170366048Abstract: A transmission antenna includes a resonance capacitor and a transmission coil coupled in series. A driver includes a bridge circuit that applies a driving voltage to the transmission antenna. A current sensor detects a current IS that flows through the bridge circuit. A foreign object detector detects the current IS that flows through the bridge circuit while changing the switching frequency applied to the bridge circuit. The foreign object detector judges the presence or absence of a foreign object based on the detection result.Type: ApplicationFiled: September 6, 2017Publication date: December 21, 2017Inventors: Masatoshi WATANABE, Tomoya MORINAGA
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Publication number: 20170104370Abstract: A wireless power transmitter for transmitting a power signal to a wireless power receiver is disclosed. The transmitter includes a transmission antenna, an inverter circuit including a plurality of switches; and a control circuit configured to demodulate a control signal received by the transmission antenna from the transmitter and control the inverter circuit based on power control data included in the control signal. The control circuit is configured to select among a first, second and third mode. For example, in the first mode in which a first pair including first and second switches and a second pair including third and fourth switches are both complementarily switched at a duty ratio of 50%, and a phase difference of the first pair and the second pair is changed between a minimum value and a maximum value depending on a transmission power, and the inverter circuit performs a full-bridge operation.Type: ApplicationFiled: October 11, 2016Publication date: April 13, 2017Inventors: Masatoshi Watanabe, Tomoya Morinaga
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Publication number: 20170093214Abstract: A wireless power transmitter transmitting a power signal to a wireless power receiver, includes: a transmission antenna; an inverter circuit applying an AC driving signal to the transmission antenna; and a control circuit controlling the inverter circuit. The control circuit includes: a demodulator demodulating a control signal received by the transmission antenna from the wireless power receiver; a transmission power measurement part measuring transmission power to generate transmission power data; and a logic circuit that controls the inverter circuit based on power control data included in the control signal to change the transmission power, control the inverter circuit based on the control signal to be transmitted to the wireless power receiver to modulate the power signal, and perform foreign object detection by a power loss method based on transmission power data and reception power data included in the control signal. The logic circuit is configured to perform a calibration sequence.Type: ApplicationFiled: September 26, 2016Publication date: March 30, 2017Inventors: Masatoshi WATANABE, Tomoya MORINAGA
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Patent number: 9577474Abstract: A demodulator is mounted on a wireless power transmitter that conforms to the Qi standard, and demodulates an amplitude modulated signal superimposed on a coil current ICOIL that flows through a primary coil of a transmission antenna, or otherwise on a coil voltage across both ends of the primary coil. Multiple demodulating units are each configured to have respectively different configurations, to operate in parallel, to extract a demodulated component from the coil current ICOIL or otherwise from the coil voltage, and to generate baseband signals as demodulated signals. A signal processing unit employs a baseband signal that is correctly received, from among the multiple baseband signals generated by the multiple demodulating units, based on an error detection result obtained using a checksum.Type: GrantFiled: June 18, 2014Date of Patent: February 21, 2017Assignee: ROHM CO., LTD.Inventors: Masatoshi Watanabe, Manabu Miyata, Tatsuya Iwasaki, Tomoya Morinaga
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Publication number: 20160134129Abstract: A transmission antenna includes a transmission coil, and transmits an electric power signal. A driver applies a driving signal to the transmission antenna. A first temperature sensor measures the temperature of the transmission coil, and generates a first temperature signal. A second temperature sensor measures the temperature of an interface surface on which an electronic device mounting a wireless power receiving apparatus is to be placed, and generates a second temperature signal. A control circuit controls the electric power signal according to the difference between the first temperature signal S11 and the second temperature signal.Type: ApplicationFiled: December 28, 2015Publication date: May 12, 2016Inventors: Masatoshi WATANABE, Tomoya MORINAGA
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Publication number: 20150069849Abstract: A demodulator is mounted on a wireless power transmitter that conforms to the Qi standard, and demodulates an amplitude modulated signal superimposed on a coil current ICOIL that flows through a primary coil of a transmission antenna, or otherwise on a coil voltage across both ends of the primary coil. Multiple demodulating units are each configured to have respectively different configurations, to operate in parallel, to extract a demodulated component from the coil current ICOIL or otherwise from the coil voltage, and to generate baseband signals as demodulated signals. A signal processing unit employs a baseband signal that is correctly received, from among the multiple baseband signals generated by the multiple demodulating units, based on an error detection result obtained using a checksum.Type: ApplicationFiled: June 18, 2014Publication date: March 12, 2015Inventors: Masatoshi WATANABE, Manabu MIYATA, Tatsuya IWASAKI, Tomoya MORINAGA
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Patent number: 7664024Abstract: In a VoIP network system, when a host terminal detects a link with a network, a connection-time determiner determines the time required for reconnection from a disconnection time when a link with the network was disconnected before to an establishment time when a link with the network is reestablished. If the time required for connection is shorter than a predetermined period of time, the connection-time determiner determines that address information is not to be transmitted since the time required for connection is too short to transmit the address information. Otherwise, the connection-time determiner determines that the address information is to be transmitted. According to a result of the determination, self-address information is transmitted by multicast communication to other terminals.Type: GrantFiled: June 8, 2007Date of Patent: February 16, 2010Assignee: Oki Semiconductor Co., Ltd.Inventor: Tomoya Morinaga
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Publication number: 20070291769Abstract: In a VoIP network system, when a host terminal detects a link with a network, a connection-time determiner determines the time required for reconnection from a disconnection time when a link with the network was disconnected before to an establishment time when a link with the network is reestablished. If the time required for connection is shorter than a predetermined period of time, the connection-time determiner determines that address information is not to be transmitted since the time required for connection is too short to transmit the address information. Otherwise, the connection-time determiner determines that the address information is to be transmitted. According to a result of the determination, self-address information is transmitted by multicast communication to other terminals.Type: ApplicationFiled: June 8, 2007Publication date: December 20, 2007Inventor: Tomoya Morinaga