| 摘要 |
A display apparatus includes a power supply comprising a commercial AC power supplying part, a transformer having a primary coil and a secondary coil and supplying an AC voltage to driving circuits, and a feedback voltage sensing part sensing a load of the secondary coil. The power supply further includes a power mode information part outputting information for determining a normal mode or a power saving mode according to an input of a synchronous signal. The power supply also includes a power driving part including a power driver generating a power regulating signal according to a synchronous signal on the basis of a feedback voltage sensed by the feedback voltage sensing part at the normal mode, and an idle power driver generating a power saving voltage on the basis of a synchronous signal which is made by synthesizing different frequency signals at the power saving mode; an idle switching part turning on/off the idle power driver. In addition, the power supply includes a control part cutting off the feedback voltage applied to the power driver and controlling the idle switching part so as to operate the idle power driver in the power saving mode. In the power saving mode, power consumption is minimized by driving a power driving part with a synthetic synchronous signal, securing a stable operation of a control part and the power driving part.
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