Abstract: The present disclosure provides a foldable display protective film having variable adhesive strength and a foldable display device including the same.

Abstract: The present disclosure provides a wireless power transmission system. Some embodiments of the present disclosure provide a power collecting device for a wireless power transmission system, including a secondary coil, an impedance matching unit and a rectifier circuit. The secondary coil is configured to generate an induction current from a power supply device for the wireless power transmission system by an electromagnetic field resonating at a predetermined frequency. The impedance matching unit is connected across the secondary coil and is configured to cooperate with the secondary coil for resonating at the predetermined frequency. The rectifier circuit is connected to output terminals of the impedance matching unit and is configured to rectify the induction current in the secondary coil into a direct current.

Abstract: The present invention relates to an electrode unit for scalp care and a high-frequency treatment apparatus for scalp care including an electrode unit for scalp care. The present invention includes an electrode unit for scalp care which maximally applies a high-frequency current to a scalp of a user to be treated through a plurality of protruding terminals and efficiently stimulates the scalp through the plurality of protruding terminals. The inventive electrode unit for scalp care supplies the high-frequency current to the scalp to be treated through a plurality of protruding terminals so that the protruding terminals and the scalp can be easily come into direct close contact with each other, and stimulates the scalp, thereby maximizing a hair and scalp care effect.