Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Masatoshi Watanabe0
Tomoya Morinaga0
Date of Patent
May 14, 2019
0Patent Application Number
156969870
Date Filed
September 6, 2017
0Patent Citations
Patent Citations Received
Patent Primary Examiner
Patent abstract
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.
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