Case Western Reserve University

Other

Rolfe G Petschek

Michael R Fisch

Charles Rosenblatt

Karl A Crandall

Donald J Taber

Daniel Harrison

The present invention consists of materials and a processing method for coating rigid-rod poly(ionomers) or salts thereof, in a solvent system, directionally on charged surfaces resulting in the formation of liquid crystal display surfaces with planar alignment and pretilt.

Buff-free liquid crystal alignment using poly(ionomer) coatings

A liquid crystal cell in which the electrodes are patterned with small scale non-conducting gaps so as to efficiently control the number, size and location of liquid crystal domains within which the liquid crystal exhibits an azimuthal orientation with predominantly the same sign and direction in a field-on condition. By patterning one or both of the electrodes with small scale non-conducting gaps, having widths less than about 2.5 times the cell gap t, that are disposed predominantly within the liquid crystal domains, or a combination of such gaps with gaps disposed primarily along the domain boundaries, one not only can obtain excellent control of the nature of the liquid crystal domains, but also the responsiveness of the cell.

Electrode patterns for liquid crystal cells

A liquid crystal cell including chiral nematic liquid material with negative dielectric anisotropy. The cell is placed between two orthogonal polarizers. In the absence of an applied field, the liquid crystal molecules assume a homeotropic alignment. The liquid crystal molecules assume a twisted pattern in the field-on state.

Cholesteric liquid crystal devices

Chiral nematic liquid crystal display with homeotropic alignment and

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Shaker Heights, OH, United States of America

Rolfe G Petschek