We describe a directed vertical alignment (VA) display mode based on a nematic liquid crystal (LC) doped with a chiral dopant and confined between two substrates, one of which is pretreated, say, by unidirectional rubbing or photoalignment. The design allows one to eliminate umbilical defects that appear during switching of the conventional VA cells and thus to obtain better contrast. Switching is similar to 30% faster than for VA cells when optimized concentration of a chiral dopant is added and LC molecules at one of the substrates are slightly tilted from the cell normal due to the unidirectional surface treatment.
Applied Physics Letters
Copyright 2006 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett. 88, 061110 (2006) and may be found at http://dx.doi.org/10.1063/1.2172299
Gu, Mingxia; Smalyukh, Ivan I.; Lavrentovich, Oleg (2006). Directed Vertical Alignment Liquid Crystal Display with Fast Switching. Applied Physics Letters 88(6) doi: 10.1063/1.2172299. Retrieved from https://oaks.kent.edu/cpippubs/185