Low-power wirelss chargeable device in a multi-node wireless power transmission system using wireless communication and wireless charging method thereof

摘要

The present invention uses a wakeup signal to communicate with and charge a wireless power supply device by supplying power when receiving a certain wakeup signal, wherein the power is usually off. According to the present invention, a wireless charging device, which receives wireless power from an external wireless power transmission device, comprises a receiving antenna; an antenna switch for controlling on/off of the receiving antenna; a matching circuit which is connected to the receiving antenna while interposing the antenna switch therebetween and tunes a resonance frequency between the wireless power supply device and the wireless charging device; a wakeup signal demodulator for processing a wakeup signal transferred through the matching circuit; a wakeup data analyzer for determining whether or not there is certain wakeup data from a signal demodulated by the wakeup signal demodulator; and a power controller which is connected to the wakeup data analyzer. [Reference numerals] (212) Antenna switch; (214) Matching circuit; (216) Wakeup signal demodulator; (218) Wakeup data analyzer; (220) Power controller; (222) Communication signal processor; (224) Central processing device; (226) Rectifier/Power supply; (228) Voltage check unit; (230) Amplifier; (232) Battery controller; (234) Battery