针对电润湿显示器像素内流体运动机理及相应电光响应特性, 提出一种数值模拟计算方法来计算电润湿中流体间的界面变化及流体-液体-固体三相接触线在外部电场影响下的运动。该方法基于Matlab数值分析框架, 通过Young-Laplace方程计算界面形状变化及变化过程中三相接触角、界面接触面积等参数的变化, 并结合总体能量守恒方程求解像素的电光响应过程。实验结果表明, 该模型成功模拟电润湿显示器像素内电流体动力特性, 像素响应时间与油-水界面张力大小成正比。模拟结果与相同参考几何的实验数据具有良好的定性一致性, 可用来指导电润湿器件中流体参数的设计, 对实现高稳定的电润湿显示器具有重要意义。

Focused on the fluid motion mechanism and corresponding electro-optic response characteristics in the electrowetting display, a numerical simulation calculation method is proposed to calculate the interface change between the conductive fluid and the non-conductive fluid in electrowetting and the motion of the fluid-liquid-solid three-phase contact line under the influence of an externally applied electric field. The method is based on Matlab numerical analysis framework. The Young-Laplace equation is used to calculate the change of interface shape and the parameters such as three-phase contact angle and interface contact area during the change process. The electro-optical response process of the pixel is solved by overall energy balance equation. The experimental results show that, the model successfully simulates the electrohydrodynamic characteristics of the electrowetting display, and the pixel response time is proportional to the oil-water interfacial tension. The simulation results of the electro-optical response have good qualitative consistency with the experimental data of the same reference geometry, which can be used to guide the design of the fluid parameters in the electrowetting device, and it is important for realizing the display of highly stable electrowetting display.