FREE POSITIONING CHARGING PAD
First Claim
1. A charging device, comprising:
- a first printed circuit board;
a first plurality of charging cells provided on a metal layer of the first printed circuit board;
a second printed circuit board; and
a second plurality of charging cells provided on a metal layer of second printed circuit board,wherein the first printed circuit board and the second printed circuit board are mechanically or adhesively bonded to provide a charging surface,wherein each charging cell in the first plurality of charging cells and the second plurality of charging cells is energized independently of the other charging cells provided in the charging device.
4 Assignments
0 Petitions
Accused Products
Abstract
Systems, methods and apparatus for wireless charging are disclosed. An apparatus has a wireless charging apparatus has a battery charging power source coupled to a charging circuit, a plurality of charging cells configured to provide a charging surface, and a controller. The controller may be configured to provide a pulse to the charging circuit, detect a frequency of oscillation of the charging circuit responsive to the pulse or a rate of decay of the oscillation of the charging circuit, and determine that a chargeable device has been placed in proximity to a coil of the charging circuit based on changes in a characteristic of the charging circuit. The pulse may have a duration that is less than half the period of a nominal resonant frequency of the charging circuit.
26 Citations
19 Claims
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1. A charging device, comprising:
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a first printed circuit board; a first plurality of charging cells provided on a metal layer of the first printed circuit board; a second printed circuit board; and a second plurality of charging cells provided on a metal layer of second printed circuit board, wherein the first printed circuit board and the second printed circuit board are mechanically or adhesively bonded to provide a charging surface, wherein each charging cell in the first plurality of charging cells and the second plurality of charging cells is energized independently of the other charging cells provided in the charging device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification