Achromatic liquid crystal shutter for stereoscopic and other app

Details Achromatic liquid crystal shutter for stereoscopic and other app Achromatic liquid crystal shutter for stereoscopic and other app

1988-11-02

1989-12-05

Miller, Stanley D.

350331R, 350332, 350337, G02F 113

Patent

active

048848760

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 having time-averaged voltage substantially equal to zero, so that a simple, low power driving circuit suffices to drive the shutter. A pair of the inventive achromatic shutters may be employed in a wireless mode as a selection device for a field-sequential stereoscopic electronic display system.

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