Apparatus for influencing the presentation of visual...

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

G - Physics

09

F

345/8

G09F 9/35 (2006.01) G02F 1/133 (2006.01) G02F 1/137 (2006.01)

Patent

CA 1241419

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 colour distortion, the continued illumination of the eye during occlusion and the very high switching speeds.

461493

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