| 摘要 |
<p>in an electro-optic line printer having a light valve (12) comprising an electro-optic element with a plurality of individually addressable electrodes (18), sample and hold circuits (42) maintain the data samples for each line of an image on the electrodes for essentially a full line printing time to increase the exposure contrast. A multiplexer may be used to ripple the data samples of a serial data stream onto the electrodes, and the polarity of the data samples applied to the electrodes may be occasionally reversed to prevent optical damage to the electro-optic element. Moreover, a pair of longitudinally displaced and laterally staggered electrode arrays may be used in light valves which rely on fringe fields to avoid electrode aligned blind spots.</p> |
