Charging apparatus

Abstract

A charging apparatus is provided that avoids a reduction in the strength of radio waves or a magnetic field used by a charging target device having a wireless communication function and reduces an influence on the radio waves or magnetic field. In this apparatus, position detection section ( 201 ) detects a position of power reception coil ( 251 ) of charging target device ( 150 ) placed on charging table ( 101 ). Power transmission coil ( 208 ) is made close to power reception coil ( 251 ) and transmits electric power. Coil moving mechanism ( 207 ) brings power transmission coil ( 208 ) close to the position of power reception coil ( 251 ) that is detected by position detection section ( 201 ).

1 . A charging apparatus that transmits electrical power to a charging target device by electromagnetic induction to charge a secondary battery of the charging target device, the charging apparatus comprising:
 a power transmission coil;   a position detection section that detects a position of a power reception coil of the charging target device placed on the charging apparatus, the position detection section includes a plurality of coils disposed separately from the power transmission coil; and   a near field communication antenna that enables near field communication with the charging target device by electromagnetic induction, wherein   the near field communication antenna is any one of the plurality of coils of the position detection section.   
     
     
         2 . The charging apparatus according to  claim 1 , further comprising:
 a near field communication control section that is to be connected to the near field communication antenna and that executes near field communication with the charging target device; and   a switching section that switches operation between the position detection section and the near field communication control section.   
     
     
         3 . The charging apparatus according to  claim 1 , further comprising:
 a charging table in which the coils of the position detection section are disposed on an inner surface side of the charging table, and on which the charging target device is to be placed, wherein   a length in a short-side direction of the charging table is greater than a length in a short-side direction of the charging target device and is less than a sum of the length in the short-side direction of the charging target device and an interval of the near field communication antenna.   
     
     
         4 . The charging apparatus according to  claim 3 , wherein the coils of the position detection section are disposed at predetermined intervals in a plurality of rows in a longitudinal direction and a transverse direction of the charging table, and the coil of the position detection section that is the near field communication antenna is disposed at a center in the short-side direction among the plurality of rows of coils of the position detection section.