Phase and magnitude control for wireless power transmitters
First Claim
1. An apparatus for wireless charging, comprising:
- a plurality of inductive elements; and
signal generation circuitry coupled to the plurality of inductive elements, the signal generation circuitry being configured to;
generate a plurality of signals, at least two signals of the plurality of signals having different magnitudes; and
drive the plurality of inductive elements using the plurality of signals, at least one first inductive element of the plurality of inductive elements being driven using at least one first signal of the plurality of signals having a first phase and at least one second inductive element of the plurality of inductive elements being driven using at least one second signal of the plurality of signals having a second phase different from the first phase, wherein;
at least one third inductive element of the plurality of inductive elements is located in a center portion of an arrangement of the plurality of inductive elements;
at least one fourth inductive element of the plurality of inductive elements is located at an outer portion of the arrangement; and
the at least one third inductive element is driven using at least one third signal of the plurality of signals having a different magnitude than at least one fourth signal of the plurality of signals used to drive the at least one fourth inductive element.
1 Assignment
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Accused Products
Abstract
Certain aspects of the present disclosure are generally directed to apparatus and techniques for wireless charging. One example apparatus generally includes a plurality of inductive elements and signal generation circuitry coupled to the plurality of inductive elements and configured to generate a plurality of signals, where at least two signals of the plurality of signals have different magnitudes. In certain aspects, the signal generation circuitry is configured to drive the plurality of inductive elements using the plurality of signals, where at least one first inductive element of the plurality of inductive elements is driven using at least one first signal of the plurality of signals having a first phase and at least one second inductive element of the plurality of inductive elements is driven using at least one second signal of the plurality of signals having a second phase different from the first phase.
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Citations
27 Claims
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1. An apparatus for wireless charging, comprising:
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a plurality of inductive elements; and signal generation circuitry coupled to the plurality of inductive elements, the signal generation circuitry being configured to; generate a plurality of signals, at least two signals of the plurality of signals having different magnitudes; and drive the plurality of inductive elements using the plurality of signals, at least one first inductive element of the plurality of inductive elements being driven using at least one first signal of the plurality of signals having a first phase and at least one second inductive element of the plurality of inductive elements being driven using at least one second signal of the plurality of signals having a second phase different from the first phase, wherein; at least one third inductive element of the plurality of inductive elements is located in a center portion of an arrangement of the plurality of inductive elements; at least one fourth inductive element of the plurality of inductive elements is located at an outer portion of the arrangement; and the at least one third inductive element is driven using at least one third signal of the plurality of signals having a different magnitude than at least one fourth signal of the plurality of signals used to drive the at least one fourth inductive element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for wireless charging, comprising:
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a plurality of inductive elements, wherein at least one first inductive element of the plurality of inductive elements is located at a center portion of an arrangement of the plurality of inductive elements, and wherein at least one second inductive element of the plurality of inductive elements is located at an outer portion of the arrangement; a controller configured to receive an indication of whether a power receiving unit (PRU) is receiving sufficient charge and generate at least one control signal based on the indication; and signal generation circuitry coupled to the plurality of inductive elements and configured to; generate a plurality of signals based on the control signal, at least one phase of the plurality of signals being set by the control signal based on the indication; and drive the plurality of inductive elements using the plurality of signals, wherein the signal generation circuitry is configured to generate the plurality of signals by generating at least one first signal to drive the at least one first inductive element and at least one second signal to drive the second inductive element, the first signal having a higher magnitude than the second signal. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method for wireless charging, comprising:
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generating a plurality of signals via signal generation circuitry, at least two signals of the plurality of signals having different magnitudes; and driving a plurality of inductive elements using the plurality of signals generated via the signal generation circuitry, the plurality of inductive elements being coupled to the signal generation circuitry, at least one first inductive element of the plurality of inductive elements being driven using at least one first signal of the plurality of signals having a first phase, and at least one second inductive element of the plurality of inductive elements being driven using at least one second signal of the plurality of signals having a second phase different from the first phase, wherein; at least one third inductive element of the plurality of inductive elements is located in a center portion of an arrangement of the plurality of inductive elements; at least one fourth inductive element of the plurality of inductive elements is located at an outer portion of the arrangement; and driving the plurality of inductive elements comprises driving the at least one third inductive element using at least one third signal of the plurality of signals having a different magnitude than at least one fourth signal of the plurality of signals used to drive the at least one fourth inductive element. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A method for wireless charging, comprising:
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receiving an indication of whether a power receiving unit (PRU) is receiving sufficient charge; generating at least one control signal based on the indication; generating a plurality of signals based on the control signal via signal generation circuitry, at least one phase of the plurality of signals being set by the control signal based on the indication; and driving a plurality of inductive elements using the plurality of signals, the plurality of inductive elements being coupled to the signal generation circuitry, wherein; at least one first inductive element of the plurality of inductive elements is located at a center portion of an arrangement of the plurality of inductive elements; at least one second inductive element of the plurality of inductive elements is located at an outer portion of the arrangement; and the generating of the plurality of signals comprises generating at least one first signal to drive the at least one first inductive element and generating at least one second signal to drive the at least one second inductive element, the first signal having a higher magnitude than the second signal. - View Dependent Claims (26, 27)
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Specification