Patent ID: 7319600

Claim:
A power supplying apparatus, comprising: a first voltage converting means for converting a first alternating current voltage into a first direct current voltage, and for changing a voltage level of the first direct current voltage into a second direct current voltage having a higher voltage level than the voltage level of the first direct current voltage; a second voltage converting means for converting the second direct current voltage into a second alternating current voltage, and for changing a voltage level of the second alternating current voltage into a third alternating current voltage having a higher voltage level than the voltage level of the second alternating current voltage to provide the third alternating current voltage to a first load; and a current detector for detecting a current flowing through the first load, and for providing a current detecting signal to the first voltage converting means so that the first voltage converting means provides a constant direct current output voltage, wherein the power supplying apparatus includes an AC input section and a liquid crystal display (LCD) module section, wherein the first voltage converting means and the second voltage converting means are formed in the LCD module section, wherein the second voltage converting means comprises: a transformer including a primary coil and a secondary coil, the primary coil of the transformer being connected to an output terminal of the first voltage converting means, and the secondary coil of the transformer being connected the first load; a resonance capacitor, connected in parallel with the primary coil, for forming an LC resonance circuit; a first transistor, a base of the first transistor being connected to the output terminal of the first voltage converting means, a collector of the first transistor being connected to a first end of the resonance capacitor, and an emitter of the first transistor being connected to a ground, for driving the transformer; a second transistor, a base of the second transistor being connected to the output terminal of the first voltage converting means, a collector of the second transistor being connected to a second end of the resonance capacitor, and an emitter of the second transistor being connected to the ground, for driving the transformer.