ACHROMATIC LIQUID CRYSTAL SHUTTER FOR STEREOSCOPIC AND OTHER APPLICATIONS
Number of patents in Portfolio can not be more than 2000
United States of America
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Apr 11, 1989
Issued Date -
N/A
app pub date -
Oct 30, 1987
filing date -
Oct 30, 1987
priority date (Note) -
Withdrawn
status (Latency Note)
Importance
Abstract
An achromatic liquid-crystal shutter with high dynamic range, good transmission, and high speed. The inventive shutter reduces the phenomenon of ''ghosting'' (image doubling) that typically occurs in conventional plano-stereoscopic CRT displays due to the low dynamic range of surface mode liquid crystal electro-optical shutters included within such displays. The inventive shutter reduces crosstalk, thus allowing comfortable fusion to take place. In one preferred embodiment, the inventive shutter system is driven by a carrier-less voltage signal (5) having time-averaged voltage substantially equal to zero, so that a simple, low power driving circuit (5, 6, 7) suffices to drive the shutter (4). A pair of the inventive achromatic shutters (1-4) may be employed in a wireless mode as a selection device for a field-sequential stereoscopic electronic display system.
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