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US 9,853,478 B2Granted
Low power detection of wireless power devices
AssigneeQUALCOMM Incorporated
InventorsKevin D Lee, Zhen Ning Low, Francesco Carobolante
Life of this patent
Estimating the term…
Abstract
Exemplary embodiments are directed to detection and validation of wirelessly chargeable devices positioned within a charging region of a wireless power transmitter. A device may include a wireless power transmitter configured detect a change in at least one parameter at the transmitter. The transmitter may further be configured to determine whether at least one valid chargeable device is positioned within a charging region of the transmitter upon detecting the change in the at least one parameter.
Claims24
A device, comprising:
- a wireless power transmitter comprising a controller, the wireless power transmitter being configured to operate in each of a first power state and a second separate power state, the transmitter transmitting at a lower power level in the first power state than in the second power state;
- and
- a detector circuit configured to detect a change in at least one parameter at the wireless power transmitter,
- wherein the controller is configured to attempt to establish wireless data communication with at least one valid chargeable device in response to the detector circuit detecting the change in the at least one parameter at the wireless power transmitter;
- wherein the controller is further configured to determine whether the at least one valid chargeable device is positioned within a charging region of the wireless power transmitter based at least in part on whether the controller successfully established a wireless data communication link with the at least one valid chargeable device, and
- wherein the transmitter is further configured to transition to the first power state in response to the controller determining that the charging region lacks any valid chargeable devices and transition to the second power state in response to the controller determining that the at least one valid chargeable device is positioned within the charging region of the wireless power transmitter.
3 more elements
A method, comprising:
- detecting a change in at least one parameter at a wireless power transmitter;
- attempting to establish wireless data communication with at least one valid chargeable device in response to detecting the change in the at least one parameter at the wireless power transmitter;
- determining whether the at least one valid chargeable device is positioned within an associated charging region of the wireless power transmitter based at least in part on whether the controller successfully established a wireless data communication link with the at least one valid chargeable device;
- operating the transmitter in one of at least a first power state or a second separate power state, the transmitter transmitting at a lower power level in the first power state than in the second power state;
- and
- transitioning the transmitter to the first power state in response to determining that the charging region lacks any valid chargeable devices or transitioning the transmitter to the second power state in response to the controller determining that the at least one valid chargeable device is positioned within the charging region of the wireless power transmitter.
3 more elements
A device, comprising:
- means for detecting a change in at least one parameter at a wireless power transmitter;
- means for attempting to establish a wireless data communication link with at least one valid chargeable device in response to the detection of the change in the at least one parameter;
- means for determining whether the at least one valid chargeable device is positioned within an associated charging region of the wireless power transmitter based at least in part on whether the means for attempting to establish a wireless data communication link successfully established the wireless data communication link with the at least one valid chargeable device prior;
- means for operating the transmitter in each of a first power state and a second separate power state, the transmitter transmitting at a lower power level in the first power state than in the second power state;
- means for transitioning the transmitter to the first power state in response to determining that the charging region lacks any valid chargeable devices;
- and
- means for transitioning the transmitter to the second state in response to determining that the at least one valid chargeable device is positioned within the charging region of the transmitter.
4 more elements
Dependencies are inferred from the claim text.