A Video Projector Using a PLZT Light Shutter Array

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Abstract
A new light-valve video projector using a PLZT light shutter linear array has been developed. A beam from a Xenon light source passes through the PLZT linear array and the resulting modulated beam is scanned vertically by a movable mirror and projected on the screen. PLZT shutters in the array are modulated with analog signals sampled from the video signal. Each shutter maintains its light intensity for the horizontal scanning period of 63.5 microseconds. The floating driving method can be used to maintain the driving voltage at the specified level because the PLZT light shutters have a memory effect similar to a capacitor. The PLZT shutters are separated from each other to eliminate crosstalk caused by stray capacity. The shutter array is made using the cutting method, which is described in detail.

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