Patents by Inventor Misako Sato
Misako Sato 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: 11843259Abstract: A wireless power feed system with high transfer efficiency of electric power is disclosed. The wireless power feed system includes a power feeding device and a power receiving device, wherein the power feeding device includes a first electromagnetic coupling coil that is connected to an AC power source via a directional coupler; a first resonant coil; a switch connected to the opposite ends of the first resonant coil; a control circuit which conducts switching on/off of the switch based on a parameter of an amplitude of a reflective wave detected by the directional coupler; and an analog-digital converter provided between the first electromagnetic coupling coil and the control circuit; and the power receiving device includes a second resonant coil; and a second electromagnetic coupling coil, and wherein the first electromagnetic coupling coil is provided between the first resonant coil and the second resonant coil.Type: GrantFiled: August 12, 2022Date of Patent: December 12, 2023Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Koichiro Kamata, Misako Sato, Shuhei Maeda
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Publication number: 20220385108Abstract: A wireless power feed system with high transfer efficiency of electric power is disclosed. The wireless power feed system includes a power feeding device and a power receiving device, wherein the power feeding device includes a first electromagnetic coupling coil that is connected to an AC power source via a directional coupler; a first resonant coil; a switch connected to the opposite ends of the first resonant coil; a control circuit which conducts switching on/off of the switch based on a parameter of an amplitude of a reflective wave detected by the directional coupler; and an analog-digital converter provided between the first electromagnetic coupling coil and the control circuit; and the power receiving device includes a second resonant coil; and a second electromagnetic coupling coil, and wherein the first electromagnetic coupling coil is provided between the first resonant coil and the second resonant coil.Type: ApplicationFiled: August 12, 2022Publication date: December 1, 2022Inventors: Koichiro KAMATA, Misako SATO, Shuhei MAEDA
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Patent number: 11424622Abstract: A wireless power feed system with high transfer efficiency of electric power is disclosed. The wireless power feed system includes a power feeding device and a power receiving device, wherein the power feeding device includes a first electromagnetic coupling coil that is connected to an AC power source via a directional coupler; a first resonant coil; a switch connected to the opposite ends of the first resonant coil; a control circuit which conducts switching on/off of the switch based on a parameter of an amplitude of a reflective wave detected by the directional coupler; and an analog-digital converter provided between the first electromagnetic coupling coil and the control circuit; and the power receiving device includes a second resonant coil; and a second electromagnetic coupling coil, and wherein the first electromagnetic coupling coil is provided between the first resonant coil and the second resonant coil.Type: GrantFiled: February 9, 2018Date of Patent: August 23, 2022Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Koichiro Kamata, Misako Sato, Shuhei Maeda
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Patent number: 10491183Abstract: A resonant power feeding system that can provide high power transmission efficiency between a power feeding device and a power reception device without dynamically controlling the oscillation frequency in accordance with the distance between the power feeding device and the power reception device. High power transmission efficiency between the power feeding device and the power reception device is obtained by addition of a structure for adjusting the matching condition to both the power reception device and the power feeding device. Specifically, a transmission-reception circuit and a matching circuit are provided in both the power reception device and the power feeding device, and wireless signals for adjusting the matching circuit are transmitted and received through a resonant coil. Thus, the power feeding device can efficiently supply power to the power reception device without adjusting the oscillation frequency.Type: GrantFiled: November 29, 2017Date of Patent: November 26, 2019Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Koichiro Kamata, Shinya Okano, Misako Sato, Shuhei Maeda
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Patent number: 10110068Abstract: An object is to provide a power feeding system and a power feeding method which are more convenient for a power feeding user at the power receiving end, without causing increases in complexity and size of devices. An object is to provide a power feeding system and a power feeding method which also allow a power feeding provider (a company) which feeds power (at the power transmitting end) to supply power without waste. A power feeding device which wirelessly supplies power to a power receiver detects the position and the resonant frequency of the power receiver by receiving a position and resonant frequency detection signal using a plurality of sub-carriers having different frequencies from the power receiver, and controls the frequency of a power signal to be transmitted to the power receiver on the basis of the information. An efficient power feeding service can be offered by transmitting a power signal to the power receiver at an optimum frequency for high power transmission efficiency.Type: GrantFiled: August 11, 2014Date of Patent: October 23, 2018Assignee: Semiconductor Energy Laboratories Co., Ltd.Inventors: Yutaka Shionoiri, Koichiro Kamata, Misako Sato, Shuhei Maeda
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Power feeding device, wireless power feeding system using the same and wireless power feeding method
Patent number: 10044224Abstract: An object is to provide a power feeding device, a power feeding system, and a power feeding method which are more convenient for a power feeding user at the power receiving end. The power feeding device includes a means of controlling a frequency of a power signal transmitted to a power receiver, based on a proportion of signals, among power signals output to an antenna circuit, that return from the power receiver to the antenna circuit without feeding power to the power receiver.Type: GrantFiled: June 15, 2016Date of Patent: August 7, 2018Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Koichiro Kamata, Misako Sato, Shuhei Maeda -
Publication number: 20180166885Abstract: A wireless power feed system with high transfer efficiency of electric power is disclosed. The wireless power feed system includes a power feeding device and a power receiving device, wherein the power feeding device includes a first electromagnetic coupling coil that is connected to an AC power source via a directional coupler; a first resonant coil; a switch connected to the opposite ends of the first resonant coil; a control circuit which conducts switching on/off of the switch based on a parameter of an amplitude of a reflective wave detected by the directional coupler; and an analog-digital converter provided between the first electromagnetic coupling coil and the control circuit; and the power receiving device includes a second resonant coil; and a second electromagnetic coupling coil, and wherein the first electromagnetic coupling coil is provided between the first resonant coil and the second resonant coil.Type: ApplicationFiled: February 9, 2018Publication date: June 14, 2018Inventors: Koichiro KAMATA, Misako SATO, Shuhei MAEDA
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Publication number: 20180091113Abstract: A resonant power feeding system that can provide high power transmission efficiency between a power feeding device and a power reception device without dynamically controlling the oscillation frequency in accordance with the distance between the power feeding device and the power reception device. High power transmission efficiency between the power feeding device and the power reception device is obtained by addition of a structure for adjusting the matching condition to both the power reception device and the power feeding device. Specifically, a transmission-reception circuit and a matching circuit are provided in both the power reception device and the power feeding device, and wireless signals for adjusting the matching circuit are transmitted and received through a resonant coil. Thus, the power feeding device can efficiently supply power to the power reception device without adjusting the oscillation frequency.Type: ApplicationFiled: November 29, 2017Publication date: March 29, 2018Inventors: Koichiro KAMATA, Shinya OKANO, Misako SATO, Shuhei MAEDA
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Patent number: 9912170Abstract: A wireless power feed system with high transfer efficiency of electric power is disclosed. The wireless power feed system includes a power feeding device and a power receiving device, wherein the power feeding device includes a first electromagnetic coupling coil that is connected to an AC power source via a directional coupler; a first resonant coil; a switch connected to the opposite ends of the first resonant coil; a control circuit which conducts switching on/off of the switch based on a parameter of an amplitude of a reflective wave detected by the directional coupler; and an analog-digital converter provided between the first electromagnetic coupling coil and the control circuit; and the power receiving device includes a second resonant coil; and a second electromagnetic coupling coil, and wherein the first electromagnetic coupling coil is provided between the first resonant coil and the second resonant coil.Type: GrantFiled: June 5, 2015Date of Patent: March 6, 2018Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Koichiro Kamata, Misako Sato, Shuhei Maeda
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Patent number: 9837977Abstract: A resonant power feeding system that can provide high power transmission efficiency between a power feeding device and a power reception device without dynamically controlling the oscillation frequency in accordance with the distance between the power feeding device and the power reception device. High power transmission efficiency between the power feeding device and the power reception device is obtained by addition of a structure for adjusting the matching condition to both the power reception device and the power feeding device. Specifically, a transmission-reception circuit and a matching circuit are provided in both the power reception device and the power feeding device, and wireless signals for adjusting the matching circuit are transmitted and received through a resonant coil. Thus, the power feeding device can efficiently supply power to the power reception device without adjusting the oscillation frequency.Type: GrantFiled: April 7, 2015Date of Patent: December 5, 2017Assignee: Semiconductor Energy Laboratory Co., LTD.Inventors: Koichiro Kamata, Shinya Okano, Misako Sato, Shuhei Maeda
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Patent number: 9472974Abstract: An object is to provide a power feeding system and a power feeding method which are more convenient for a power feeding user at the power receiving end. An object is to provide a power feeding system and a power feeding method which also allow a power feeding provider (a company) which feeds power (at the power transmitting end) to supply power without waste. A power feeding device which wirelessly supplies power to a power receiver detects the position and the resonant frequency of the power receiver to be supplied with power, and controls the frequency of a power signal to be transmitted to the power receiver on the basis of the information. An efficient power feeding service can be offered by transmitting a power signal to the power receiver at an optimum frequency for high power transmission efficiency.Type: GrantFiled: September 9, 2014Date of Patent: October 18, 2016Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Yutaka Shionoiri, Koichiro Kamata, Misako Sato, Shuhei Maeda
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POWER FEEDING DEVICE, WIRELESS POWER FEEDING SYSTEM USING THE SAME AND WIRELESS POWER FEEDING METHOD
Publication number: 20160301254Abstract: An object is to provide a power feeding device, a power feeding system, and a power feeding method which are more convenient for a power feeding user at the power receiving end. The power feeding device includes a means of controlling a frequency of a power signal transmitted to a power receiver, based on a proportion of signals, among power signals output to an antenna circuit, that return from the power receiver to the antenna circuit without feeding power to the power receiver.Type: ApplicationFiled: June 15, 2016Publication date: October 13, 2016Inventors: Koichiro KAMATA, Misako SATO, Shuhei MAEDA -
Power feeding device, wireless power feeding system using the same and wireless power feeding method
Patent number: 9391476Abstract: An object is to provide a power feeding device, a power feeding system, and a power feeding method which are more convenient for a power feeding user at the power receiving end. The power feeding device includes a means of controlling a frequency of a power signal transmitted to a power receiver, based on a proportion of signals, among power signals output to an antenna circuit, that return from the power receiver to the antenna circuit without feeding power to the power receiver.Type: GrantFiled: August 22, 2011Date of Patent: July 12, 2016Assignee: Semiconductor Energy Laboratory Co., LTD.Inventors: Koichiro Kamata, Misako Sato, Shuhei Maeda -
Publication number: 20150270723Abstract: A wireless power feed system with high transfer efficiency of electric power is disclosed. The wireless power feed system includes a power feeding device and a power receiving device, wherein the power feeding device includes a first electromagnetic coupling coil that is connected to an AC power source via a directional coupler; a first resonant coil; a switch connected to the opposite ends of the first resonant coil; a control circuit which conducts switching on/off of the switch based on a parameter of an amplitude of a reflective wave detected by the directional coupler; and an analog-digital converter provided between the first electromagnetic coupling coil and the control circuit; and the power receiving device includes a second resonant coil; and a second electromagnetic coupling coil, and wherein the first electromagnetic coupling coil is provided between the first resonant coil and the second resonant coil.Type: ApplicationFiled: June 5, 2015Publication date: September 24, 2015Inventors: Koichiro KAMATA, Misako SATO, Shuhei MAEDA
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Publication number: 20150214918Abstract: A resonant power feeding system that can provide high power transmission efficiency between a power feeding device and a power reception device without dynamically controlling the oscillation frequency in accordance with the distance between the power feeding device and the power reception device. High power transmission efficiency between the power feeding device and the power reception device is obtained by addition of a structure for adjusting the matching condition to both the power reception device and the power feeding device. Specifically, a transmission-reception circuit and a matching circuit are provided in both the power reception device and the power feeding device, and wireless signals for adjusting the matching circuit are transmitted and received through a resonant coil. Thus, the power feeding device can efficiently supply power to the power reception device without adjusting the oscillation frequency.Type: ApplicationFiled: April 7, 2015Publication date: July 30, 2015Inventors: Koichiro KAMATA, Shinya OKANO, Misako SATO, Shuhei MAEDA
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Patent number: 9054544Abstract: A wireless power feed system with high transfer efficiency of electric power is disclosed. The wireless power feed system includes a power feeding device and a power receiving device, wherein the power feeding device includes a first electromagnetic coupling coil that is connected to an AC power source via a directional coupler; a first resonant coil; a switch connected to the opposite ends of the first resonant coil; a control circuit which conducts switching on/off of the switch based on a parameter of an amplitude of a reflective wave detected by the directional coupler; and an analog-digital converter provided between the first electromagnetic coupling coil and the control circuit; and the power receiving device includes a second resonant coil; and a second electromagnetic coupling coil, and wherein the first electromagnetic coupling coil is provided between the first resonant coil and the second resonant.Type: GrantFiled: December 6, 2011Date of Patent: June 9, 2015Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Koichiro Kamata, Misako Sato, Shuhei Maeda
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Patent number: 9024482Abstract: A resonant power feeding system that can provide high power transmission efficiency between a power feeding device and a power reception device without dynamically controlling the oscillation frequency in accordance with the distance between the power feeding device and the power reception device. High power transmission efficiency between the power feeding device and the power reception device is obtained by addition of a structure for adjusting the matching condition to both the power reception device and the power feeding device. Specifically, a transmission-reception circuit and a matching circuit are provided in both the power reception device and the power feeding device, and wireless signals for adjusting the matching circuit are transmitted and received through a resonant coil. Thus, the power feeding device can efficiently supply power to the power reception device without adjusting the oscillation frequency.Type: GrantFiled: January 18, 2012Date of Patent: May 5, 2015Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Koichiro Kamata, Shinya Okano, Misako Sato, Shuhei Maeda
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Publication number: 20150008758Abstract: An object is to provide a power feeding system and a power feeding method which are more convenient for a power feeding user at the power receiving end, without causing increases in complexity and size of devices. An object is to provide a power feeding system and a power feeding method which also allow a power feeding provider (a company) which feeds power (at the power transmitting end) to supply power without waste. A power feeding device which wirelessly supplies power to a power receiver detects the position and the resonant frequency of the power receiver by receiving a position and resonant frequency detection signal using a plurality of sub-carriers having different frequencies from the power receiver, and controls the frequency of a power signal to be transmitted to the power receiver on the basis of the information. An efficient power feeding service can be offered by transmitting a power signal to the power receiver at an optimum frequency for high power transmission efficiency.Type: ApplicationFiled: August 11, 2014Publication date: January 8, 2015Inventors: Yutaka SHIONOIRI, Koichiro KAMATA, Misako SATO, Shuhei MAEDA
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Publication number: 20140375263Abstract: An object is to provide a power feeding system and a power feeding method which are more convenient for a power feeding user at the power receiving end. An object is to provide a power feeding system and a power feeding method which also allow a power feeding provider (a company) which feeds power (at the power transmitting end) to supply power without waste. A power feeding device which wirelessly supplies power to a power receiver detects the position and the resonant frequency of the power receiver to be supplied with power, and controls the frequency of a power signal to be transmitted to the power receiver on the basis of the information. An efficient power feeding service can be offered by transmitting a power signal to the power receiver at an optimum frequency for high power transmission efficiency.Type: ApplicationFiled: September 9, 2014Publication date: December 25, 2014Inventors: Yutaka SHIONOIRI, Koichiro KAMATA, Misako SATO, Shuhei MAEDA
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Patent number: 8901777Abstract: A power feeding device which wirelessly supplies power to a power receiver receives a position and resonant frequency detection signal from the power receiver, detects the position and the resonant frequency of the power receiver, and controls the frequency of a power signal to be transmitted to the power receiver on the basis of the information. As the power signal for power transmission, two signals having different frequencies, which are generated using a mixer by mixing a base carrier (a first signal) with a conversion carrier (a second signal) generated on the basis of the resonant frequency, are used.Type: GrantFiled: July 25, 2011Date of Patent: December 2, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Koichiro Kamata, Misako Sato, Shuhei Maeda