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Comparative electrooptic study of new orthoconic liquid crystals with fluorinated alkoxy terminal chains

Spadło A., Otón E., Dąbrowski R., Żurowska M., Otón J. M., Bennis N.

Opto-Electronics Review

2010

Vol. 18, No. 2

219-222

Electrooptical properties of several new orthoconic antiferroelectric liquid crystal mixtures with partially fluorinated alkoxyalkoxy terminal chains have been investigated in order to select the best mixture for display applications. Electrooptical studies have been performed on these orthoconic materials aiming at evaluating their static and dynamic performance under passive multiplexing conditions. A number of parameters have been evaluated, static and dynamic contrast, driving scheme for passive multiplexing, rise and fall response times, dynamic range, and dynamic greyscale.

Modifying electrooptics of orthoconic antiferroelectric liquid crystal cells by manufacturing procedures

Spadło A., Bennis N., Dąbrowski R., Quintana X., Otón J. M., Geday M. A.

Opto-Electronics Review

2007

Vol. 15, No. 1

60-65

Orthoconic antiferroelectric liquid crystals (AFLCs) having 45° tilt angle have been proposed to overcome the problem of reduced contrast usually exhibited by regular antifrerroelectric displays. However, the pitch of the helix induced by chrality is customarily short in existing orthoconic materials, making it difficult to achieve surface stabilized configurations when the material's pitch is amaller than the cell thickness.In this work, the influence of different manufacturing procedures on the electrooptical behaviour of orthoconic AFLCs is studied. Using the same arthoconic AFLC mixture, aligning surfaces and manufacturing protocol, we have observed two dissimilar responses, true orthoconic behaviour; and orthoconic V-shape response. The electrooptical response depends ultimately on the rubbing strategy adopted in either case.