Patent ID: 7898302

Claim:
A liquid lens system comprising: a liquid lens a logic interface for receiving liquid lens focusing signals from an external processor; an output peak regulation circuit coupled to the logic interface for receiving the liquid lens focusing signals from the logic interface; a controllable charge pump for boosting the voltage of a power supply to the liquid lens focusing voltage responsive to the control of the output peak regulation circuit, the charge pump having a first charge pump and a plurality of cascaded second charge pumps, the first charge pump pumping from a voltage difference between an input power supply and a circuit ground, and the plurality of cascaded second charge pumps pumping between a voltage difference equal to the output of the first charge pump and the circuit ground; an oscillator; an H-bridge circuit coupled to an output of the controllable charge pump and driven by the oscillator circuit for providing a balanced wave to the liquid lens responsive to the output of the controllable charge pump.