| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio charger with a metal housing or a part of the housing made of metal and to provide a radio charging method using the same. <P>SOLUTION: A radio charger comprises: resonance capacitors each connected in series; a resonance circuit for resonating with frequency of external power transmitted by radio from outside, the circuit being composed of a resonance coil having a closed loop magnetic core, a part of whose sectional area where the magnetic core has no coil is smaller than a sectional area of coil part; and a secondary battery to be charged with the external power through the resonance circuit. A housing of the charger or a part of the housing is made of metal. As for the resonance capacitors, a reference resonance capacitor and one or more amendment resonance capacitors are prepared. The amendment resonance capacitors can be connected to the reference resonance capacitor and are used so that the resonance circuit resonates with the frequency of the external power. <P>COPYRIGHT: (C)2012,JPO&INPIT |
