We proposed a method to control the pretilt angle of liquid crystals by stacking of a vertical alignment layer on a planar alignment layer. The pretilt angle can be controlled over the full range (0°–90°) depending on the thickness of the vertical alignment layer. We also proposed a numerical model to describe the physical mechanism based on the anchoring competition between liquid crystal, planar, and vertical polyimide alignment layers.
Control of liquid crystal pretilt angle by anchoring competition of the stacked alignment layers
You-Jin Lee, Jin Seog Gwag, Young-Ki Kim, Soo In Jo, Seung-Gon Kang, Young Ran Park, Jae-Hoon Kim; Control of liquid crystal pretilt angle by anchoring competition of the stacked alignment layers. Appl. Phys. Lett. 26 January 2009; 94 (4): 041113. https://doi.org/10.1063/1.3068003
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