| 摘要 |
Disclosed is an apparatus and a method for differentially driving a piezoelectric actuator (56) in a "smooth pixel" DLP projector (40). Actuator (56) is driven differentially in order to obtain a drive level (VM) that is larger than the available supply voltage (74). Drive is by anti-phase signals (S5,S6), one of which (S5) is DC offset to avoid a negative drive across actuator (56).
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