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 detects an input signal provided from the primary coil to generate an output signal in the form of a pulse, and compares the level of the generated output signal with a reference voltage to generate a detection signal for determining the presence or absence of the reception device.
1 Assignment
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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 detects an input signal provided from the primary coil to generate an output signal in the form of a pulse, and compares the level of the generated output signal with a reference voltage to generate a detection signal for determining the presence or absence of the reception device. The wireless charging system does not require an analog-to-digital converter (ADC), eliminating the necessity of using an ADC chip or a high-priced control circuit including an ADC block, thus reducing a material cost of the system. In addition, since the wireless charging system does not require a software algorithm for processing an ADC signal, the performance can be improved.
32 Citations
11 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 detects an input signal provided from the primary coil to generate an output signal in the form of a pulse, and compares the level of the generated output signal with a reference voltage to generate a detection signal for determining the presence or absence of the reception device.
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7. 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 detecting an input signal provided from the primary coil to generate an output signal in the form of a pulse, and compares the level of the generated output signal with a reference voltage to generate a detection signal for determining the presence or absence of the reception device; and a controller generating a control signal for driving the PA driving unit in response to the detection signal provided from the detection unit. - View Dependent Claims (8, 9, 10, 11)
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Specification