Patent ID: 8169430

Claim:
A display system, comprising: a low drop-out voltage regulator (LDO) for receiving an input voltage and providing an output voltage, said LDO comprising: a regulating circuit, comprising a regulating circuit input for receiving said input voltage, a regulating circuit output for outputting said output voltage, and a regulating circuit control terminal; a first switch, disposed between said regulating circuit input and said regulating circuit control terminal, wherein said regulating circuit control terminal selectively receives said input voltage according to ON/OFF of said first switch; a current source circuit for providing fixed current to said regulating circuit control terminal and said regulating circuit output; and an inverting circuit, comprising an inverting circuit input and an inverting circuit output, said inverting circuit input being coupled to said regulating circuit output, said inverting circuit output being coupled to said regulating circuit control terminal, said inverting circuit being provided for inverting said output voltage from said regulating circuit output so as to provide a control voltage to said regulating circuit control terminal, said control voltage having an opposite level with respect to said output voltage; wherein said regulating circuit control terminal adjusts said output voltage in accordance with said control voltage received from said inverting circuit output.