APPARATUS AND METHOD FOR REDUCING NOISE OF A WIRELESS CHARGING DEVICE
First Claim
1. A method for reducing noise in a wireless charging device, comprising:
- outputting a pulse of a first voltage to a first coil in a first period and monitoring a variation in a response current according to feedback of the output pulse to check whether an object is located on the wireless charging device;
checking whether communication with the object is possible when the object is located on the wireless charging device; and
when communication with the object is not possible, outputting a pulse of a second voltage lower than the first voltage to the first coil in the first period to check whether the object is located on the wireless charging device.
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Accused Products
Abstract
The present disclosure relates to an apparatus and a method for reducing noise generated in a wireless charging device. A method for reducing noise in a wireless charging device may include: outputting a pulse of a first voltage to a first coil in a first period and monitoring a variation in a response current according to feedback of the output pulse to check whether an object is located on the wireless charging device; checking whether communication with the object is possible when the object is located on the wireless charging device; and, when communication with the object is not possible, outputting a pulse of a second voltage lower than the first voltage to the first coil in the first period to check whether the object is located on the wireless charging device. Accordingly, noise generated in the wireless charging device can be reduced.
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Citations
13 Claims
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1. A method for reducing noise in a wireless charging device, comprising:
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outputting a pulse of a first voltage to a first coil in a first period and monitoring a variation in a response current according to feedback of the output pulse to check whether an object is located on the wireless charging device; checking whether communication with the object is possible when the object is located on the wireless charging device; and when communication with the object is not possible, outputting a pulse of a second voltage lower than the first voltage to the first coil in the first period to check whether the object is located on the wireless charging device. - View Dependent Claims (2, 3, 4, 5, 6, 13)
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7. A wireless charging device, comprising:
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a controller configured to control a period and voltage of a pulse output to a first coil; an object recognition unit configured to check whether an object is located on the wireless charging device by monitoring a variation in a response current according to feedback of the output pulse; and a communication unit configured to perform communication with the object, wherein the controller is configured to control a second voltage lower than a first voltage of the pulse output to the first coil to be output when communication with the object is impossible. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification