Skin care device using multiple composite laser pulses and method thereof

1 . A skin care device using a multiple composite laser pulse, comprising:

a laser generating unit including an energy portion configured to supply energy, a light emitting portion configured to generate light by absorbing the energy supplied from the energy portion, a first mirror and a second mirror configured to form a resonance path in which the light generated from the light emitting portion is amplified, a polarizing portion disposed on an optical resonant path between the first mirror and the second mirror and configured to polarize the light, and a first switch and a second switch configured to convert a polarization component of an incident polarized light; and

a control unit configured to control the energy portion, the first switch, and the second switch to output drive signals that are independently set for each of the first switch and the second switch such that the laser generating unit operates in a single laser pulse mode or a multiple laser pulse mode to output a composite multiple laser pulse,

wherein the second switch operates to generate a laser pulse having a time width of several microseconds (μs) to several hundreds of microseconds (μs), and the first switch operates one or more times during a period in which the second switch is operating to generate one or more laser pulses having a time width of several nanoseconds (ns) to several tens of nanoseconds (ns).

2 . The device of claim 1 , wherein the control unit controls the first switch and the second switch such that at least one of a multiple laser pulse having a first time width or a multiple laser pulse having a second time width different from the first time width is generated in the multiple laser pulse mode.

3 . The device of claim 1 , wherein the polarization component of the incident polarized light polarized by the polarizing portion is not converted into another polarization component, when no electrical signal is applied to the first switch or the second switch.

4 . The device of claim 1 , wherein the polarization component of the incident polarized light polarized by the polarizing portion is converted into another polarization component, when an electrical signal is applied to the first switch or the second switch.

5 . The device of claim 1 , wherein the laser pulse outputted from the laser generating unit has a time width that is identical to a time of generating light by the light emitting portion, when no electrical signal is applied to the first switch or the second switch.

6 . The device of claim 1 , wherein, when an electrical signal is applied to the first switch or the second switch, the laser pulse outputted from the laser generating unit has a time width that is identical to a time width of the electrical signal that is applied.

7 . The device of claim 1 , wherein the laser pulse is not outputted from the laser generating unit, when an electrical signal is applied to one of the first switch and the second switch, and not applied to the other.

8 . The device of claim 1 , wherein the laser pulse generated by the second switch ranges from 10 μs to 500 μs in width.

9 . A skin care method using a multiple composite laser pulse, comprising:

generating laser pulse using a laser generating unit including an energy portion for supplying energy, a light emitting portion for generating light by absorbing the energy supplied from the energy portion, a first mirror and a second mirror that form a resonance path in which the light generated from the light emitting portion is amplified, a polarizing portion disposed on an optical resonant path between the first mirror and the second mirror to polarize the light, and a first switch and a second switch for converting a polarization component of an incident polarized light; and

controlling the energy portion, the first switch, and the second switch to output drive signals that are independently set for each of the first switch and the second switch such that the laser generating unit operates in a single laser pulse mode or a multiple laser pulse mode to output a composite multiple laser pulse,

wherein the second switch operates to generate a laser pulse having a time width of several microseconds (μs) to several hundreds of microseconds (μs), and the first switch operates one or more times during a period in which the second switch is operating to generate one or more laser pulses having a time width of several nanoseconds (ns) to several tens of nanoseconds (ns).

10 . The method of claim 9 , wherein the first switch and the second switch are controlled such that at least one of a multiple laser pulse having a first time width or a multiple laser pulse having a second time width different from the first time width is generated in the multiple laser pulse mode.

11 . The method of claim 9 , wherein the first switch and the second switch operate while the energy portion supplies energy of a first period, and wherein the first switch and the second switch do not operate while the energy portion supplies energy of a second period.

12 . The method of claim 9 , wherein the first switch and the second switch operate while the energy portion supplies energy of a first period, and wherein the first switch and the second switch operate while the energy portion supplies energy of a second period.

13 . The method of claim 9 , wherein the first switch and the second switch do not operate while the energy portion supplies energy of a first period, and wherein the first switch and the second switch operate while the energy portion supplies energy of a second period.

14 . The method of claim 9 , wherein the first switch and the second switch do not operate while the energy portion supplies energy of a first period, and wherein the first switch and the second switch do not operate while the energy portion supplies energy of a second period.

15 . The method of claim 9 , wherein the laser pulse generated by the second switch ranges from 10 μs to 500 μs in width.