Wireless power transmission device and control method therefor
摘要
說明書
On the other hand, the wireless power transmitter 100 in the selection state 610 may detect an object by at least any one of the detection methods using the inductive coupling method and resonance coupling method. The wireless power transmitter 100 may perform an object detection process according to each power transmission method, and subsequently select a method of detecting the object from the coupling methods for contactless power transfer to advance to other states 620, 630, 640.
On the other hand, for the wireless power transmitter 100, a wireless power signal formed to detect an object in the selection state 610 and a wireless power signal formed to perform digital detection, identification, configuration and power transmission in the subsequent states 620, 630, 640 may have a different characteristic in the frequency, strength, and the like. It is because the selection state 610 of the wireless power transmitter 100 corresponds to an idle state for detecting an object, thereby allowing the wireless power transmitter 100 to reduce consumption power in the idle state or generate a specialized signal for effectively detecting an object.
2) Ping State
The wireless power transmitter 100 in the ping state 620 performs a process of detecting the wireless power receiver 200 existing within the detection area through a power control message. Compared to the detection process of the wireless power receiver 200 using a characteristic of the wireless power signal and the like in the selection state 610, the detection process in the ping state 620 may be referred to as a digital ping process.
