Skin care device and control method therefor
AssigneeAmosense Co., Ltd.
InventorsJong Min Lee, Jun Ho Park, Jin-Pyo Park, Won-San Na
Life of this patent
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Abstract
Disclosed are: a skin care device which determines whether, on the basis of a voltage fluctuation according to contact with the skin, the skin care device has been rubbed, and which blocks the output of current through an electrode when rubbing does not occur for at least a set time; and a control method therefor. The disclosed skin care device determines the state of the skin care device on the basis of sensing voltage corresponding to a change in current of a transformation module according to the outputting of alternating current into the skin through contact electrodes, and blocks the output of current of an electrode module if the skin care device is in a fixed state.
Claims13
A skin care device comprising:
- an electrode module which has at least a pair of contact electrodes configured for outputting an alternating current to a skin;
- a transformation module which amplifies an alternating current voltage to be applied to output the amplified alternating current voltage to the electrode module;
- a sensing module which senses a current signal of the transformation module, and converts a refined current signal with noise removed from the current signal into a sensed voltage signal to output the sensed voltage signal;
- and
- a control module which determines a state of the skin care device based on the sensed voltage signal output from the sensing module, and controls a current output of the electrode module based on the state of the skin care device,
- wherein the control module blocks a current output of the electrode module when the skin care device is in a fixed state,
- wherein the control module determines the state of the skin care device based on the sensed voltage signal when determining that the skin care device enters a rubbing sensing mode,
- determines that the skin care device is in a rubbed state when a fluctuation size of the sensed voltage signal is a set size or more, and
- determines that the skin care device is in a fixed state when the fluctuation size of the sensed voltage signal is smaller than the set size,
- wherein the control module determines whether the skin care device enters a rubbing sensing mode based on the sensed voltage signal, and
- determines that the skin care device enters the rubbing sensing mode when a slope of the sensed voltage signal is a minimum set slope or less, or an amplitude of the sensed voltage signal is smaller than a set amplitude during a set time, and
- wherein the control module determines that there is noise when the slope of the sensed voltage signal during the set time is a maximum set slope or more, and re-determines whether to enter the rubbing sensing mode based on a slope in a next section of the sensed voltage signal.
A method for controlling a skin care device, the method comprising:
- applying an alternating current to a skin through at least a pair of contact electrodes;
- sensing a voltage fluctuation according to the application of the alternating current;
- determining a state of a skin care device based on the voltage fluctuation;
- and
- blocking the alternating current applied to the skin, when it is determined that the skin care device is in a fixed state,
- wherein the determining of the state of the skin care device
- determines that the skin care device is in a rubbed state when the fluctuation size of the sensed voltage signal converted in the sensing of the voltage fluctuation is a set size or more, and
- determines that the skin care device is in a fixed state when the fluctuation size of the sensed voltage signal is smaller than the set size,
- wherein the determining of the state of the skin care device comprises determining whether to enter a rubbing sensing mode based on a sensed voltage signal according to the voltage fluctuation,
- wherein the determining of whether to enter the rubbing sensing mode determines that the skin care device enters the rubbing sensing mode when a slope of the sensed voltage signal is a minimum set slope or less, or an amplitude of the sensed voltage signal is smaller than a set amplitude during a set time, and
- wherein the determining of whether to enter the rubbing sensing mode determines that there is noise when the slope of the sensed voltage signal during the set time is a maximum set slope or more, and re-determines whether to enter the rubbing sensing mode based on a slope in a next section of the sensed voltage signal.
Dependencies are inferred from the claim text.