Abstract: A transcranial direct current stimulation (tDCS) apparatus includes a stimulation unit, a control unit, and an input/output (I/O) unit. The stimulation unit includes a power-supply unit to supply power for electrical stimulation corresponding to a control signal received from the control unit, and a plurality of stimulation electrodes, each of which has a hydrogel patch, to provide electrical stimulation to a living body upon receiving the power from the power-supply unit. The control unit is configured to control an on/off function of the power-supply unit such that the power-supply unit is turned on or off according to the amount of power applied to the stimulation electrodes and a time period during which the power is supplied or not supplied.

Abstract: Provided is a dry electrode for detecting a bio-signal, comprising a body part; a protrusion part formed on one surface of the body part; and a coating part formed on an end surface of the protrusion part, wherein the body part and the protrusion part comprise a conductive silicone, and the coating part comprises Ag, AgCl, and, optionally, 3-aminopropyltriethoxysilane.

Abstract: Provided is an electrical stimulation device. The electrical stimulation device includes a first electrode that contacts a first portion of the head of a user to apply a current to the head of the user, a second electrode that contacts a second portion that is different from the first portion of the head of the user to apply a current to the head of the user, a controller that performs a control such that polarities of the first electrode and the second electrode can be changed based on a reference comprising at least one of a reference time, a reference pH index, and a reference number of uses.

Abstract: An electrical stimulation and bio-potential measurement device is provided. The electrical stimulation and bio-potential measurement device comprises at least one electrode module which comes into contact with the scalp of a user, a current supply unit, connected to the at least one electrode module, for supplying a current to the at least one electrode module so that the at least one electrode module can apply electrical stimulation to the user, and a signal processing unit, connected to the at least one electrode module, for processing bio-potential signals detected by the at least one electrode module, wherein the current supply unit comprises at least one switch which is arranged between the at least one electrode module and a voltage source for supplying the current.

Abstract: A transcranial direct current stimulation (tDCS) apparatus includes a stimulation unit, a control unit, and an input/output (I/O) unit. The stimulation unit includes a power-supply unit to supply power for electrical stimulation corresponding to a control signal received from the control unit, and a plurality of stimulation electrodes, each of which has a hydrogel patch, to provide electrical stimulation to a living body upon receiving the power from the power-supply unit. The control unit is configured to control an on/off function of the power-supply unit such that the power-supply unit is turned on or off according to the amount of power applied to the stimulation electrodes and a time period during which the power is supplied or not supplied.

Abstract: Provided is a dry electrode for detecting a bio-signal, comprising a body part; a protrusion part formed on one surface of the body part; and a coating part formed on an end surface of the protrusion part, wherein the body part and the protrusion part comprise a conductive silicone, and the coating part comprises Ag, AgCl, and, optionally, 3-aminopropyltriethoxysilane.

Abstract: An electrical stimulation and bio-potential measurement device is provided. The electrical stimulation and bio-potential measurement device comprises at least one electrode module which comes into contact with the scalp of a user, a current supply unit, connected to the at least one electrode module, for supplying a current to the at least one electrode module so that the at least one electrode module can apply electrical stimulation to the user, and a signal processing unit, connected to the at least one electrode module, for processing bio-potential signals detected by the at least one electrode module, wherein the current supply unit comprises at least one switch which is arranged between the at least one electrode module and a voltage source for supplying the current.

Abstract: Provided are an ancillary device for an electrical stimulation device and an electrical stimulation device. The ancillary device is usable for an electrical stimulation device including at least one electrode that contacts the head of a user to apply a current to the head of a user, and includes a reverse current supplier that contacts the at least one electrode of the electrical stimulation device, and a controller that controls the reverse current supplier such that a reverse current is supplied to the at least one electrode to neutralize the at least one electrode.

Abstract: Provided is an electrical stimulation device. The electrical stimulation device includes a first electrode that contacts a first portion of the head of a user to apply a current to the head of the user, a second electrode that contacts a second portion that is different from the first portion of the head of the user to apply a current to the head of the user, a controller that performs a control such that polarities of the first electrode and the second electrode can be changed based on a reference comprising at least one of a reference time, a reference pH index, and a reference number of uses.

Abstract: Disclosed is an electrical stimulation device. The electrical stimulation device includes at least one electrode unit that contacts the head of a user to apply a current to the head of the user, and a current providing module that provides a current to the at least one electrode unit, wherein the current providing module includes a plurality of pads disposed on a path for providing the current to the at least one electrode unit to be spaced apart from each other, and wherein the current providing module provides the current to the at least one electrode unit if the plurality of pads are connected to each other by a conductive material.

Abstract: Provided are an ancillary device for an electrical stimulation device and an electrical stimulation device. The ancillary device is usable for an electrical stimulation device including at least one electrode that contacts the head of a user to apply a current to the head of a user, and includes a reverse current supplier that contacts the at least one electrode of the electrical stimulation device, and a controller that controls the reverse current supplier such that a reverse current is supplied to the at least one electrode to neutralize the at least one electrode.