Molecular Crystals and Liquid Crystals, Vol.476, 443-458, 2007
Optimization of LCD pixel structure for continuous pinwheel alignment (CPA) mode
In this article, we report our theoretical study on the electro-optical properties of continuous pinwheel alignment (CPA) mode. We performed three-dimensional finite element method (3D-FEM) simulations on various CPA electrode patterns and compared our simulation results with the conventional vertical alignment (VA) mode. Each CPA pixel pattern was careffilly examined with respect to the transmission, dynamic response, and contrast ratio as well as viewing characteristics in an effort to optimize the electrode pattern. Our numerical study revealed that the optimum dimension for the thickness of the liquid crystal (Delta d) should be chosen as 2.9 mu m where CPA mode can exhibit superior performance on VA mode in terms of transmission as well as viewing characteristics. Further, our numerical simulation demonstrated that the transmittance of CPA mode can be improved over VA mode by 81% while the viewing angle characteristics can be improved by 22%.