WIRELESS CHARGING PAD AND METHOD

• US 20140266020A1
• Filed: 03/14/2013
• Published: 09/18/2014
• Est. Priority Date: 03/14/2013
• Status: Abandoned Application

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: van Lammeren, Johannes Petrus Maria, Brink, Klaas, Sedzin, Aliaksei Vladimirovich
• Application Number:
  US13/802,909
• Publication Number:
  US 20140266020A1
• Time in Patent Office: Days
• US Class Current: 320/108
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A wireless charging pad is illustratively disclosed. In an embodiment, the pad includes an NFC tag which is capable of receiving an NFC signal from the receiver and thereby turning on the pad'"'"'s power supply to commence charging of the receiver.

Claims

1. A wireless charging pad comprising:

a power supply;

a switch connected to said power supply and capable of turning said power supply on;

an NFC tag positioned proximate said switch and capable of turning said switch on in response to an NFC signal.

2. The charging pad of claim 1 in which said switch is a transistor.

3. The charging pad of claim 1 in which said NFC tag is responsive to information about a receiver placed in proximity to said pad.

4. The charging pad of claim 1 further including a coil connected to said power supply and capable of being energized by said power supply.

5. A method of charging a receiver comprising:

providing a charging pad having a power supply;

a coil connected to said power supply;

a switch connected to said power supply and capable of turning said power supply on;

an NFC tag positioned proximate said switch and capable of turning said switch on in response to an NFC signal;

whereby if a receiver having NFC transmitting capability is positioned proximate said pad and said receiver transmits an NFC signal, said transistor will turn on said power supply which will energize said coil and charge said receiver.