| 摘要 |
A method for overcoming optical artifacts which are an intrinsic part of the performance of twisted nematic liquid crystal shutter devices. When power is shut off from a conventional shutter device of this type, the device exhibits a brief periodic flickering called "bounce". When the power is turned on, the device exhibits a similar flickering effect, known as "stumble." When a pair of such devices are used as lenses in a stereoscopic selection apparatus, these artifacts, which contribute nothing to the device's performance, are obtrusive and disturbing to the user. By carefully controlling the voltage to each shutter in accordance with the invention while turning the shutter on or off, these artifacts are eliminated or substantially reduced.
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