Inductive powering surface for powering portable devices

Details Inductive powering surface for powering portable devices Inductive powering surface for powering portable devices

2007-08-28

2007-08-28

Lee, Benjamin C. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S568100, C340S645000, C340S568800, C336S118000, C336S130000

Reexamination Certificate

active

11128510

ABSTRACT:
An inductive powering device provides power to a portable device via inductive coupling between primary coils in the surface of the powering device and a secondary coil in the portable device. The portable device includes a passive locator device, such as an RFID device, to allow the primary coils of the inductive powering surface to detect the presence and location of the secondary coil, and only primary coils adjacent the secondary coil are energized for power transfer. A cost-effective driving configuration that arranges the primary coils into a matrix with drive circuits switchably connected to the row and columns is used to energize the primary coils.

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