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Title:
Spherulitic liquid crystalline texture
Abstract:
Liquid crystalline compositions comprising dielectrically negative nematic liquid crystalline materials from about 0.4 percent by weight to about 3 percent by weight optically active materials, in contact with an aligning agent, and characterized by a helical pitch to layer thickness ratio of from about 1 to about 10 are transformed from an initially homeotropic or homogeneous texture into a novel stable spherulitic texture upon removal of an applied D.C. or low frequency A.C. electrical field. Erasure and imaging of the novel spherulitic texture are disclosed.
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Inventors:
Haas, Werner E. L. (Webster, NY, US) Adams, James E. (Bear Creek Harbor East, NY, US)
Application Number:
473598
Filing Date: 1974-05-28 Publication_date: 1976-02-17 Assignee:
Xerox Corporation (Stamford, CT)
Primary Class(es):
349/169
349/33, 349/168, 349/186
Other Classes:
US Patent Ref:
Other Refs:
Other References:
Hezlmeier et al. "A New Electric-Field-Controlled..." APL Vol. 13, No. 4 pp. 132-3, 15 Aug. 1968. |