Vertical alignment liquid crystal cell with optically compensated splay configuration of the liquid crystal

Lee, S.H.; Kim, S.J.; Kim, J.C.
March 2004
Applied Physics Letters;3/1/2004, Vol. 84 Issue 9, p1465
Academic Journal
We have observed a phenomenon associated with a transition from vertical alignment to an optically compensated splay structure. With rubbed homeotropic alignment in parallel directions, the device shows vertical alignment but the liquid crystals (LCs) are twisted 180° in the absence of an electric field. Depending on the voltage applied, two different configurations of LCs are possible. After applying a critical voltage, the LC configuration becomes splayed such that the middirector lies parallel to the substrate and around it, and a hybrid structure forms symmetrically. A method for obtaining the transition and the electro-optic characteristics of the device is discussed. © 2004 American Institute of Physics.


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