SYSTEMS AND METHODS FOR DETECTING AND IDENTIFYING A WIRELESS POWER DEVICE
First Claim
1. An apparatus for detecting an object within a power delivery region of a wireless power transmitter configured to transfer power to a device having a wireless power receiver, the apparatus comprising:
- a driver configured to generate a driving signal to drive a circuit to output a wireless power field;
a sensor configured to sense an amount of power drawn by the driver to generate a sensing signal;
a communication unit configured to receive, from the wireless power receiver, a signal indicative of a change in power received by the wireless power receiver; and
a controller configured to monitor a change in a power drawn by the driver based on the sensing signal and identify the type of object based on at least one of the monitored change in the power drawn and the received signal.
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Accused Products
Abstract
Embodiments are directed to detecting and identifying a type of a wireless power device in a wireless power transfer field. According to one aspect, systems and methods are disclosed which describe limiting power transfer to non-compliant devices and detection of undesired power absorbers, such as metal objects, in a wireless power system. A method may include detecting one or more non-compliant devices and/or undesired wireless power absorbers positioned within a charging region of a wireless power transmitter. The method may further include limiting an amount of power transmitted by a transmitter in response to the detection, or reducing the amount of power received by the non-compliant device.
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Citations
27 Claims
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1. An apparatus for detecting an object within a power delivery region of a wireless power transmitter configured to transfer power to a device having a wireless power receiver, the apparatus comprising:
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a driver configured to generate a driving signal to drive a circuit to output a wireless power field; a sensor configured to sense an amount of power drawn by the driver to generate a sensing signal; a communication unit configured to receive, from the wireless power receiver, a signal indicative of a change in power received by the wireless power receiver; and a controller configured to monitor a change in a power drawn by the driver based on the sensing signal and identify the type of object based on at least one of the monitored change in the power drawn and the received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of identifying a type of an object within a power transfer region of a wireless power transmitter configured to transfer power to a device including a wireless power receiver, the method comprising:
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monitoring a change in a power drawn by the wireless power transmitter; receiving, from the wireless power receiver, a signal indicative of a change in power received by the wireless power receiver; and identifying the type of the object based on the monitored change in the power drawn and the received signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An apparatus for identifying a type of an object within a power transfer region of a wireless power transmitter configured to transfer power to a device including a wireless power receiver, the apparatus comprising:
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means for monitoring a change in a power drawn by the wireless power transmitter; means for receiving, from the wireless power receiver, a signal indicative of a change in power received by the wireless power receiver; and means for identifying the type of the object based on the monitored change in the power drawn and the received signal. - View Dependent Claims (27)
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Specification