| 摘要 |
<p>The invention concerns control circuitry (100) for driving a liquid lens (102) with a required drive voltage (V OUTA , V OUTB ), the liquid lens comprising first and second immiscible liquids, an interface between the first and second liquids being moveable by electrowetting by application of said drive voltage, the control circuitry comprising:
signal generating means (148) arranged to generate a pulsed signal comprising pulses, each pulse having a width modulated based on said required drive voltage;
a filter (110) arranged to filter said pulsed signal to generate an analogue control voltage (V c );
and drive circuitry (104, 106, 108) arranged to generate said required drive voltage based on said control voltage.</p> |
