Abstract: An electronic device includes an element body. The element body includes a first internal electrode layer, a second internal electrode layer, and a dielectric layer laminated between the first internal electrode layer and the second internal electrode layer. Ni oxide particles exist at a first boundary between the first internal electrode layer and the dielectric layer. The dielectric layer includes a dielectric large particle in contact with both of the Ni oxide particles at the first boundary and the second internal electrode layer.

Abstract: A bridge circuit (30) alternately applies a first voltage and a second voltage having mutually different polarities to a capacitor (200). A diode (41) is connected to one end of the capacitor (200). A diode (42) is connected to another end of the capacitor (200). A capacitor (50) is connected to the diode (41) and the diode (42). A control circuit (60) controls a plurality of switch elements included in the bridge circuit (30) in such a way that electric charge stored in the capacitor (200) moves to the capacitor (50) via the diode (41) when a voltage applied to the capacitor (200) transitions from the first voltage to the second voltage and electric charge stored in the capacitor (200) moves to the capacitor (50) via the diode (42) when a voltage applied to the capacitor (200)transitions from the second voltage to the first voltage.

Abstract: Provided is an input device capable of facilitating an operation for inputting, a command such as characters. The input device includes an operation unit of which an operation amount is variable and a control unit. The control unit selects one command group among a plurality of command groups and decides on a command on the basis of the command group selected and the operation amount of the operation unit. The control unit switches the command group selected when the operation amount of the operation unit is in a prescribed range.

Abstract: A metallic foreign object detector is used in a wireless power transmission system that transmits power by wireless from a feeding coil to a receiving coil and includes an antenna coil, a capacitor that forms a resonance circuit together with the antenna coil, a vibration detection circuit configured to detect generation of a vibration signal in the resonance circuit, and a determination circuit that detects the presence/absence of a metallic foreign object according to the vibration signal. The vibration detection circuit is configured to output a detection state signal indicating the detection state of generation of the vibration signal. The determination circuit is configured to execute an operation of detecting the presence/absence of a metallic foreign object according to the detection state signal.

Abstract: An object of the present invention is to suppress deterioration in detection accuracy during power feeding in the detection of the metallic foreign object using the antenna coil. A metallic foreign object detector includes: an antenna coil; a capacitor that constitutes a resonance circuit RC together with the antenna coil; a power supply that applies voltage to the resonance circuit to generate a vibration signal in the resonance circuit; a determination circuit that determines the presence/absence of a metallic foreign object based on the waveform of the vibration signal; a resonance capacitor switch inserted into the resonance circuit; and a control circuit that controls the open/close state of the resonance capacitor switch. The control circuit brings the resonance capacitor switch into a closed state responding to the power supply starting application of voltage to the resonance circuit.

Abstract: Disclosed herein is a leakage detector provided in a device having a conversion circuit that converts a DC voltage and an AC voltage from one to the other and a grounded metal member. The leakage detector comprises: an average voltage detection circuit that detects the average voltage of voltages corresponding to a potential difference between a high-voltage-side terminal or a low-voltage-side terminal on the DC side of the conversion circuit and the metal member; and a leakage detection circuit that detects the presence/absence of a leakage based on the average voltage detected by the average voltage detection circuit.

Abstract: An object of the present invention is to improve the accuracy of detection of the metallic foreign object. A metallic foreign object detector includes a sensor part having at least one antenna coil that receives a magnetic field or current to generate a vibration signal, an integration circuit that acquires the integral value of a waveform of a signal corresponding to the vibration signal, and a determination circuit that determines the presence/absence of a metallic foreign object approaching the antenna coil based on the integral value and a criterion integral value which is the integral value obtained in the absence of the approaching metallic foreign object. The integral value and the criterion integral value are obtained by integrating the waveform having the same wavenumber.

Abstract: An object of the present invention is to reduce the possibility of failure in the detection of metallic foreign object. A metallic foreign object detector includes a sensor part having at least one antenna coil that receives a magnetic field or current to generate a vibration signal a vibration time length measurement circuit that measures a vibration time length indicating the length of time required for the vibration of the vibration signal output from the sensor part corresponding to a predetermined wavenumber larger than 1, and a determination circuit that determines the presence/absence of a metallic foreign object approaching the antenna coil based on the vibration time length and a criterion vibration time length which is the vibration time length obtained in the absence of the approaching metallic foreign object.

Abstract: Disclosed herein is a wireless power receiving device that wirelessly receives power transmitted from a wireless power transmitting device. The wireless power receiving device comprises: a power receiving coil that receives an AC power through a magnetic field; a power-receiving-side capacitor that constitutes a resonance circuit together with the power receiving coil; a rectifying circuit that rectifies the AC power received by the power receiving coil by a plurality of bridge-connected semiconductor devices each having a rectifying function; and a short-circuit detection circuit that detects a short circuit in the rectifying circuit based on a first AC voltage which is a voltage between a one-side input line of the rectifying circuit and a stable potential and a second AC voltage which is a voltage between the other-side input line of the rectifying circuit and the stable potential.

Abstract: An object of the present invention is to improve detection accuracy of a metallic foreign object between a feeding coil and a receiving coil during wireless power feeding. A wireless power transmitting device is a device that performs power transmission by wireless using an alternating magnetic field vibrating at a predetermined power transmission frequency and includes a feeding coil, an antenna coil, a capacitor that constitutes a resonance circuit RC together with the antenna coil, a noise detection part that detects noise vibrating at a frequency higher than the power transmission frequency, and a foreign object detection part 140 that detects the presence/absence of a metallic foreign object based on a change in voltage or current generated in the resonance circuit RC and a noise detection result from the noise detection part.

Abstract: A metallic foreign object detector, used in a wireless power transmission system that transmits power using an alternating magnetic field, includes antenna coils that generate a vibration signal by receiving a magnetic field or current, one or more capacitors that constitute a resonance circuit together with each of the antenna coils, and a detection part that detects a metallic foreign object by sequentially using the antenna coils. The detection part has detection modes that detect the presence/absence of the metallic foreign object based on changes in mutually different characteristics of the resonance circuit. The detection part selects one mode from the detection modes in accordance with at least one of the power feeding state of the wireless power transmission system and the position of each of the plurality of antenna coils and performs the detection of the metallic foreign object in the selected detection mode.

Abstract: A wireless power reception device includes: a power receiving coil coupled to a transmitting coil; a first rectifier circuit rectifies AC voltage supplied from the receiving coil and outputs to a load; a first capacitor connected between 11th and 12th output terminals respectively on high and low potential sides among output terminals in the first rectifier circuit and the first rectifier circuit and the load; a second rectifier circuit connected to the receiving coil parallel to the first and rectifies AC voltage supplied from the receiving coil; a second capacitor connected between 21st and 22nd output terminals respectively on the high and low potential sides among second rectifier circuit output terminals; a second voltage detecting circuit detects voltage between the 21st and 22nd output terminals; and a position detecting circuit detects the receiving coil position relative to the power transmitting coil by voltage detected by the second voltage detecting circuit.

Abstract: A wireless power reception device detects a power receiving coil position relative to a power transmitting coil while curbing an increase in power loss. The wireless power reception device includes: a power receiving coil magnetically coupled to the power transmitting coil; a first rectification and smoothing circuit rectifying an AC voltage supplied from the power receiving coil and outputs the rectified AC voltage to a load; first and second capacitors respectively connected to first and second transmission lines; a first resistor having one terminal connected to the first capacitor and the other terminal is supplied with a predetermined reference potential; a second resistor having one terminal connected to the second capacitor and the other terminal is supplied with the reference potential; and a position detecting circuit detecting the power receiving coil position relative to the power transmitting coil on the basis of first and second junction point potentials.

Abstract: An object of the present invention is to reduce the possibility of failure in the detection of metallic foreign object. A metallic foreign object detector includes a sensor part having at least one antenna coil that receives a magnetic field or current to generate a vibration signal a vibration time length measurement circuit that measures a vibration time length indicating the length of time required for the vibration of the vibration signal output from the sensor part corresponding to a predetermined wavenumber larger than 1, and a determination circuit that determines the presence/absence of a metallic foreign object approaching the antenna coil based on the vibration time length and a criterion vibration time length which is the vibration time length obtained in the absence of the approaching metallic foreign object.

Abstract: A metallic foreign object detector, used in a wireless power transmission system that transmits power using an alternating magnetic field, includes antenna coils that generate a vibration signal by receiving a magnetic field or current, one or more capacitors that constitute a resonance circuit together with each of the antenna coils, and a detection part that detects a metallic foreign object by sequentially using the antenna coils. The detection part has detection modes that detect the presence/absence of the metallic foreign object based on changes in mutually different characteristics of the resonance circuit. The detection part selects one mode from the detection modes in accordance with at least one of the power feeding state of the wireless power transmission system and the position of each of the plurality of antenna coils and performs the detection of the metallic foreign object in the selected detection mode.

Abstract: A metallic foreign object detector is used in a wireless power transmission system that transmits power by wireless from a feeding coil to a receiving coil and includes an antenna coil, a capacitor that forms a resonance circuit together with the antenna coil, a vibration detection circuit configured to detect generation of a vibration signal in the resonance circuit, and a determination circuit that detects the presence/absence of a metallic foreign object according to the vibration signal. The vibration detection circuit is configured to output a detection state signal indicating the detection state of generation of the vibration signal. The determination circuit is configured to execute an operation of detecting the presence/absence of a metallic foreign object according to the detection state signal.

Abstract: An object of the present invention is to suppress deterioration in detection accuracy during power feeding in the detection of the metallic foreign object using the antenna coil. A metallic foreign object detector includes: an antenna coil; a capacitor that constitutes a resonance circuit RC together with the antenna coil; a power supply that applies voltage to the resonance circuit to generate a vibration signal in the resonance circuit; a determination circuit that determines the presence/absence of a metallic foreign object based on the waveform of the vibration signal; a resonance capacitor switch inserted into the resonance circuit; and a control circuit that controls the open/close state of the resonance capacitor switch. The control circuit brings the resonance capacitor switch into a closed state responding to the power supply starting application of voltage to the resonance circuit.

Abstract: An object of the present invention is to improve detection accuracy of a metallic foreign object between a feeding coil and a receiving coil during wireless power feeding. A wireless power transmitting device is a device that performs power transmission by wireless using an alternating magnetic field vibrating at a predetermined power transmission frequency and includes a feeding coil, an antenna coil, a capacitor that constitutes a resonance circuit RC together with the antenna coil, a noise detection part that detects noise vibrating at a frequency higher than the power transmission frequency, and a foreign object detection part 140 that detects the presence/absence of a metallic foreign object based on a change in voltage or current generated in the resonance circuit RC and a noise detection result from the noise detection part.

Abstract: An object of the present invention is to improve the accuracy of detection of the metallic foreign object. A metallic foreign object detector includes a sensor part having at least one antenna coil that receives a magnetic field or current to generate a vibration signal, an integration circuit that acquires the integral value of a waveform of a signal corresponding to the vibration signal, and a determination circuit that determines the presence/absence of a metallic foreign object approaching the antenna coil based on the integral value and a criterion integral value which is the integral value obtained in the absence of the approaching metallic foreign object. The integral value and the criterion integral value are obtained by integrating the waveform having the same wavenumber.

Abstract: A wireless power reception device that can detect a position of a power receiving coil relative to a power transmitting coil irrespective of a connection state of a load is provided.