Wireless Charging System Capable of Outputting Charging Information of Transmitter by Receiver

摘要

According to the present invention, a wireless charging system (1) capable of outputting charging information of a transmission unit from a reception unit includes: the transmission unit (10) including a primary coil (11) connected to a power source, a transmission control unit (12) for controlling power transmission of the primary coil (11), a transmission-side AD conversion unit (13) for converting the charging information generated from the transmission control unit (12) into a digital signal, a frequency modulation unit (14) for modulating the digital signal of the transmission-side AD conversion unit (13) into a corresponding frequency signal, an amplification unit (15) for amplifying the modulated frequency signal, and a speaker (16) for outputting the amplified frequency signal as a sound wave; and the reception unit including a secondary coil (21) for receiving electric power from the primary coil (11), a microphone unit (22) for receiving the sound wave of the speaker (16) to generate an electric signal, a reception-side AD conversion unit (23) for converting the electric signal generated from the microphone (22) into a corresponding digital signal, a CPU (24) for generating the charge information corresponding to the digital signal obtained from the reception-side AD conversion unit (23), and an output unit (25) for visually or audibly outputting the charging information obtained from the CPU (24).