Abstract: A user-customized skin care method according to an embodiment of the present disclosure is capable of facilitating care for skin improvement by providing a user with customized skin care instructions through an analysis of a user skin condition by estimation models. In the customized skin care method, operation of a skin care device of a user is controlled according to skin care instructions estimated on the basis of personal information and skin condition information of the user, so that the user is provided with optimum customized skin care.

Abstract: A portable skin condition measuring apparatus according to an embodiment of the present disclosure is capable of complexly measuring and analyzing various skin condition indexes of a user by coming into contact with a user's face, body, or scalp. The portable skin condition measuring apparatus may solve inconvenience in measuring a user's skin condition and improve efficiency of measurement, determination, and care of the user's skin condition by measuring and analyzing various skin condition indexes of the user in a non-face-to-face manner.

Abstract: A skin measuring apparatus measures a skin moisture level using a voltage application electrode and a current detection electrode. The skin measuring apparatus includes an electrode driving module applying sinusoidal wave voltage to skin of a user through the voltage application electrode so that an amount of current is output from the skin through the current detection electrode, a signal detecting unit detecting the amount of current from the skin through the current detection electrode to calculate at least one of an impedance signal and an admittance signal, and a skin information determination unit analyzing the at least one of the impedance signal and the admittance signal to calculate the skin moisture level and a sweat production rate of the user, thereby analyzing the skin moisture level and the sweat generation rate more precisely without distortion.

Abstract: A skin measuring apparatus measures a skin moisture level using a voltage application electrode and a current detection electrode. The skin measuring apparatus includes an electrode driving module applying sinusoidal wave voltage to skin of a user through the voltage application electrode so that an amount of current is output from the skin through the current detection electrode, a signal detecting unit detecting the amount of current from the skin through the current detection electrode to calculate at least one of an impedance signal and an admittance signal, and a skin information determination unit analyzing the at least one of the impedance signal and the admittance signal to calculate the skin moisture level and a sweat production rate of the user, thereby analyzing the skin moisture level and the sweat generation rate more precisely without distortion.

Abstract: A transepidermal water loss measurement device includes a cylindrical closed chamber having a closed end and an open end to come into contact with the skin at a position at which a rate of water loss is to be measured and a transepidermal water loss measurement unit that measures a rate of transepidermal water loss of the skin by detecting levels of humidity and changes in humidity level in the closed chamber.