Charging system that detects receiver standard and adjusts charging with switches and selection of capacitors
First Claim
1. A wireless power transmitter configured to transfer power to a wireless power receiver in a wireless manner, the transmitter comprising:
- a coil configured to transmit power to the wireless power receiver in different frequency bands of a first communication standard and a second communication standard;
a circuit unit having a plurality of capacitors electrically connected to the coil, and configured to support each of a plurality of frequencies by changing the electric connection of the capacitors; and
a wireless charging unit configured to;
apply an input voltage to the coil to detect whether the wireless power receiver supports the first communication standard,detect a communication standard which the wireless power receiver complies with based on whether a signal from the wireless power receiver is received, andcontrol the electric connection of the capacitors to be charged such that the circuit unit operates at a frequency corresponding to the detected communication standard.
1 Assignment
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Accused Products
Abstract
The present disclosure relates to a wireless power transfer method, a wireless power transmitter and a wireless charging system in a wireless power transfer field. That is, a wireless power transmitter configured to transfer power to a wireless power receiver in a wireless manner includes a power transfer unit configured to transmit power to the wireless power receiver in the wireless manner, a circuit unit having a plurality of capacitors electrically connected to the power transfer unit, and configured to support each of a plurality of frequencies by changing the electric connection of the capacitors, and a controller configured to detect a communication standard that the wireless power receiver supports, and control the electric connection of the capacitors such that the circuit unit operates at a frequency corresponding to the detected communication standard.
46 Citations
20 Claims
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1. A wireless power transmitter configured to transfer power to a wireless power receiver in a wireless manner, the transmitter comprising:
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a coil configured to transmit power to the wireless power receiver in different frequency bands of a first communication standard and a second communication standard; a circuit unit having a plurality of capacitors electrically connected to the coil, and configured to support each of a plurality of frequencies by changing the electric connection of the capacitors; and a wireless charging unit configured to; apply an input voltage to the coil to detect whether the wireless power receiver supports the first communication standard, detect a communication standard which the wireless power receiver complies with based on whether a signal from the wireless power receiver is received, and control the electric connection of the capacitors to be charged such that the circuit unit operates at a frequency corresponding to the detected communication standard. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wireless power transfer method configured to transmit power to a wireless power receiver in a wireless manner, the method comprising:
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generating a first signal complying with a first communication standard and a second signal complying with a second communication standard in a sequential manner, so as to detect a communication standard that the wireless power receiver supports; applying the first signal with an input voltage to a coil to detect whether the wireless power receiver supports the first communication standard; determining a communication standard that the wireless power receiver supports from the first and second communication standards, using a response of the receiver to the first signal; boosting the input voltage to support the second communication standard if the response is not received; and controlling an electric connection of a plurality of capacitors to be charged such that power is transferred in the wireless manner at one of a plurality of frequency bands according to the determined communication standard. - View Dependent Claims (14, 15, 16)
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17. A wireless charging system comprising:
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a wireless power transmitter configured to transmit power in a wireless manner; and a wireless power receiver configured to receive power from the transmitter in a wireless manner, wherein the wireless power transmitter comprises; a coil configured to transmit power to the wireless power receiver in different frequency bands of a first communication standard and a second communication standard; a circuit unit having a plurality of capacitors electrically connected to the coil, and configured to support each of a plurality of frequencies by changing the electric connection of the capacitors; and a wireless charging unit configured to apply an input voltage to the coil to detect whether the wireless power receiver supports the first communication standard, detect a communication standard which the wireless power receiver complies with based on whether a signal from the wireless power receiver is received, and control the electric connection of the capacitors to be charged such that the circuit unit operates at a frequency corresponding to the detected communication standard. - View Dependent Claims (18, 19, 20)
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Specification