Patent ID: 7417197
Filing Date: 2008-08-26
Classification: H02J,H05K

Abstract:
1. A power transfer pad, comprising: a non-conductive board having a top and a bottom; a plurality of conductive substrate sections disposed across the top of the non-conductive board; at least one conducting element disposed on each of the conductive substrate sections wherein the conducting elements define an exposed top surface of the power transfer pad for temporary placement of an electrical device having a positive contact and a negative contact for charging the electrical device; a plurality of electrical contacts on the bottom of the non-conductive board, wherein each of the electrical contacts on the bottom of the non-conductive board are in electrical communication with one of the conductive substrate sections on the top of the non-conductive board; and logic circuitry configured to identify the positive contact and the negative contact of the electrical device when the electrical device is placed on the power transfer pad, wherein the positive and negative contacts are identified by determining that a first one of the conductive substrate sections is electrically coupled to the positive contact and a second one of the conductive substrate sections is electrically coupled to the negative contact, the logic circuitry being further configured to cause the plurality of electrical contacts to supply a positive charge to the positive contact via the first one of the conductive substrate sections and to supply a negative charge to the negative contact via the second one of the conductive substrate sections.