Multi-Dimensional Liquid Crystal Alignment Effect of Polymer Wall on Vertically Aligned Liquid Crystal Cell

Abstract

This paper investigates the multi-dimensional liquid crystal (LC) alignment effect of a polymer wall. The polymer wall is formed on the pixel boundary by an anisotropic phase separation method, which affects the nearby LC orientation. Vertically aligned (VA) LC cells are fabricated in order to show the effect of the polymer wall on LC displays. The electro-optic characteristics of the LC cell are affected by the shape and orientation of the molecules that form the polymer wall. The VA LC cell that has a polymer wall formed by vertically-aligned anisotropic-molecules on the pixel boundary shows much faster turn-on and turn-off times than the conventional LC cell without polymer wall, as well as no loss of transmittance within its pixel area.

Study on the Effect of Monoacrylic Monomers on the Polymer Network Morphology and Electro-Optical Performance of Reverse-Mode Polymer Stabilized Liquid Crystal Devices

“…Taking advantage of the anchoring effect of the polymer interface on small LC molecules, small LC molecules were aligned in a specific direction in a PWSLC film. A PWSLC film has the characteristics of flexible folding and compression resistance by reason of the existence of polymer walls, making its mechanical properties improved compared to those of PSLC film [24][25][26][27][28][29]. Confronted with real scenarios, lower V th , quicker response time, and a stabilized polymer network are preferred.…”

Photo-Polymerization in Chiral Dopant Liquid Crystal Cells via Holographic Exposure to Fabricate Polarization-Independent Phase Modulator with Fast Optical Response

“…After photo exposure processes, the generated polymer networks provide a constrained force for LC molecules to speed up reorientation time during electrical operation. In addition, some research studies have demonstrated various electro-optical devices that are based on LC/polymer composited cells, which have achieved improved optical response times [ 12 , 13 ]. However, these devices are also polarization-dependent.…”

Structure control of lattice-patterned liquid crystals–polymer composites prepared by polarization-selective UV-curing through the addition of a fluorinated acrylate monomer

“…In particular, flexible displays based on LC-polymer composites have been extensively studied and widely used for display applications because of their higher mechanical stability [7]. From many types of LC-polymer composites, micro-wall structure of LC-polymer composite is one of the most promising fabrication methods for flexible display devices [8][9][10][11][12][13][14][15]. In this structure, LC molecules are isolated in pixels surrounded by inter-pixel vertical micro-scale polymer walls.…”