In this letter the authors studied the method to control the position of the generated defect on the slit of the patterned vertical alignment liquid crystal (LC) cell with dynamic stability. The authors modeled the LC director field with a defect on the slit and proposed an advanced wing pattern with a defect trap to stick the defect outside the active area. This shape can prevent the generation of the defect on the slit in the active area even if the authors increase the operation voltage, so that the LC dynamics on the slit is very stable and optical transmittance becomes higher.

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In this research we study the motion of a defect in a homeotropic liquid crystal director with an inhomogeneous patterned electrode by using the fast Q tensor method, which can calculate the order parameter S in addition to the director orientation. An inhomogeneous solid surface with a step function is applied for modelling. The simulation includes defect nucleation, motions on the inhomogeneous surface, and the dependence of defect behavior on the shape of the electrode. In addition, we calculate the defect motion in the homeotropic in-plane switching liquid crystal cell. We believe that the calculated results using the fast Q-tensor method can provide a basic design rule of the electrode for better optical performance.

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