Low-power wireless charging apparatus and method thereof
First Claim
1. A low-power wireless charging apparatus comprising:
- a plurality of primary coils;
a plurality of drivers configured to periodically and sequentially transmit receiver detect signals for detecting receivers connected to the plurality of primary coils, respectively;
a sensor configured to detect a current and a voltage according to a magnetic field changed by one or more of the plurality of primary coils by the receiver detect signals transmitted through the plurality of drivers;
a comparator configured to compare the current and voltage detected by the sensor with pre-set values;
a low-power auxiliary control device configured to generate a wake-up signal when one or more receivers are present; and
a main control device configured to turn on upon receiving the wake-up signal generated by the low-power auxiliary control unit, and controllable to generate a wireless power signal for charging a corresponding receiver and transmit the generated wireless power signal.
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Accused Products
Abstract
Disclosed herein is a low-power wireless charging apparatus including: a plurality of primary coils corresponding to a plurality of receivers, respectively; a plurality of drivers periodically and sequentially transmitting receiver detect signals; a sensing unit detecting a current and a voltage according to a magnetic field changed by one or more of the plurality of primary coils; a comparator comparing the detected current and voltage with pre-set values; a low-power auxiliary control unit generating a wake-up signal when one or more receivers are present; and a main control unit turned on upon receiving the wake-up signal, and controlled to generate a wireless power signal for charging a corresponding receiver and transmit, whereby unnecessary power consumption can be prevented and the burden of the main control unit can be lessened, thus increasing efficiency.
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Citations
11 Claims
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1. A low-power wireless charging apparatus comprising:
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a plurality of primary coils; a plurality of drivers configured to periodically and sequentially transmit receiver detect signals for detecting receivers connected to the plurality of primary coils, respectively; a sensor configured to detect a current and a voltage according to a magnetic field changed by one or more of the plurality of primary coils by the receiver detect signals transmitted through the plurality of drivers; a comparator configured to compare the current and voltage detected by the sensor with pre-set values; a low-power auxiliary control device configured to generate a wake-up signal when one or more receivers are present; and a main control device configured to turn on upon receiving the wake-up signal generated by the low-power auxiliary control unit, and controllable to generate a wireless power signal for charging a corresponding receiver and transmit the generated wireless power signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A low-power wireless charging method comprising:
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(A) generating, by a low-power auxiliary control device, receiver detect signals corresponding to a plurality of primary coils to determine whether or not a receiver is present, and generating a wake-up signal when one or more receivers are present; and (B) turning on a main control device by receiving the generated wake-up signal to generate a wireless power signal for charging a corresponding receiver and transmit the generated wireless power signal. - View Dependent Claims (9, 10, 11)
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Specification