| 摘要 |
An apparatus for maintaining and supplying stable power to a skin care device comprising a DC-DC converting unit ( 20 ) for escalating the voltages from a charged battery power source ( 1 ), a skin-stimulating unit ( 50 ) with a supersonic element or an ion-inducting element, a switch unit ( 30 ) having a main switch (SW 1 ) and various functional switches, an LCD displayer ( 40 ) for indicating various operating modes, a CPU ( 2 ) for controlling each component, a main switch initiating unit having a function when the main switch (SW 1 ) is turned on, the CPS is activated by a switching signal inputted to an analogue input port from said CPU, the first switch unit ( 31 ) is activated by the CPU through an analogue output port, then the FET (D 4 ) is switched to supply battery power to the DC-DC converting unit ( 20 ), and a function of the PWM control signal, which prolongs the switching-on stage for gradually increasing the voltage up to the operating voltage during the step-up stage, and inversely shortens the switching-off stage for gradually decreasing the operating voltage during the step-down stage. A strength-adjusting switch (SW 3 ) for controlling the strength of output voltage of the DC-DC converting unit ( 20 ), and a mode switch (SW 2 ) for operating various modes of supersonic vibrations controlled by each vibrating frequency. An LED displayer being equipped with a minimum number of connecting pins for indicating various operating modes. Each LED is independently activated to turn on and off according to each signal of the input-output terminal from a controlling unit of the CPU.
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