WIRELESS CHARGING SYSTEM
First Claim
1. A wireless charging system that includes a transmission device including a primary coil and a reception device including a secondary coil,wherein the transmission device determines the presence or absence of the reception device upon receiving a feedback remaining amount of a current supplied from the primary coil to the secondary coil, and controls a voltage input to the primary coil based on the determination results.
2 Assignments
0 Petitions
Accused Products
Abstract
Disclosed herein is a wireless charging system that includes a transmission device including a primary coil and a reception device including a secondary coil, wherein the transmission device determines the presence or absence of the reception device upon receiving the remaining amount of current supplied from the primary coil to the secondary coil, and controls a voltage input to the primary coil based on the determination results. The wireless charging system can generate a sensing signal for determining the presence and absence of the reception device by measuring the amount of current applied from the transmitter coil to the receiver coil through the detection unit. Thus, the receiver controller of the wireless charging system can accurately determine whether to transmit power by comparing the sensing signal provided from the detection unit with a reference signal, thus reducing power consumption.
8 Citations
18 Claims
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1. A wireless charging system that includes a transmission device including a primary coil and a reception device including a secondary coil,
wherein the transmission device determines the presence or absence of the reception device upon receiving a feedback remaining amount of a current supplied from the primary coil to the secondary coil, and controls a voltage input to the primary coil based on the determination results.
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5. A wireless charging system that includes a transmission device including a primary coil and a reception device including a secondary coil,
wherein the transmission device includes: -
a power source unit generating charging power by using an external power source; a power amplifier (PA) driving unit amplifying a high frequency from the charging power generated by the power source unit; a detection unit electrically connected with the primary coil and generating a sensing signal upon receiving a feedback remaining amount of a current supplied from the primary coil to the secondary coil; and a controller comparing the sensing signal provided from the detection unit with a reference signal and generating a control signal for driving the PA driving unit based on the comparison results. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A charging method of a wireless charging system including a transmission device including a primary coil and a reception device including a secondary coil, the method comprising:
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generating a sensing signal upon receiving a feedback remaining amount of a current supplied from the primary coil to the secondary coil and; comparing the sensing signal with a pre-set reference signal; and controlling a voltage input to the primary coil based on the comparison results. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification