Apparatus for influencing the presentation of visual information

Details Apparatus for influencing the presentation of visual information Apparatus for influencing the presentation of visual information

1983-08-26

1987-10-06

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 88, 340784, 350331R, 350332, 350350R, H04N 1300

Patent

active

046986685

ABSTRACT:
An electro-optical device for influencing the presentation of visual information when placed before the eyes of an observer, comprising one or more cholesteric liquid crystal cells which, under the control of an electric driving signal, can be rapidly switched, by means of the cholesteric-nematic phase change effect, between a clear, transparent texture and a cloudy, scattering texture. The invention is particularly suited for applications as a spectacle-mounted stroboscope, tachistoscope or stereoscopic viewer, wherein special features are the absence of color distortion, the continued illumination of the eye during visual occlusion and the very high switching speeds.

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"Liquid Crystal Reflection Cell with Improved Response Times", Hasker et al., Applied Optics, Oct. '80, vol. 19, #19, pp. 3257-3259.

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