Patent ID: 7619830

Claim:
A liquid-filled lens driver for receiving a lens driver control signal from an image signal processor and driving a liquid-filled lens, comprising: an input/output interface unit exchanging the lens driver control signal and status information of the liquid-filled lens with the image signal processor according to a certain signal transmission protocol; a system clock generation unit for generating a system clock; a high voltage generation unit for generating high voltage, which can drive the liquid-filled lens, using low voltage of a battery of a mobile information terminal; a voltage generation unit for providing reference voltage and bias voltage for operating the liquid-filled lens driver; a drive signal generation unit for generating a final drive signal for the liquid-filled lens by generating a low level differential waveform for driving the liquid-filled lens and boosting the low level differential waveform to a high voltage level generated by the high voltage generation unit; and a control unit for controlling the function units so that they can drive the liquid-filled lens.