为了研究投射式电容触摸屏电极图形对灵敏度的影响, 实现从电极图形的设计上改进触摸屏的灵敏度, 采用有限元分析理论, 先对一些常见的电极图形进行仿真分析, 并在此基础上新设计几种类型的触摸屏电极, 通过对不同电极图形触摸屏的仿真, 验证了电极图形与灵敏度关系。实验结果表明: “十字”、“米字”、“雪花”电极分别比菱形电极的灵敏度增加了1.122%、4.149%、5.779%, 改进后效果最好的“新雪花”电极的灵敏度比菱形电极增加了12.481%, 且高灵敏度区域面积大大增加。研究得出的电极图形和触摸屏灵敏度之间的相互关系对高灵敏度触摸屏的设计具有重要的应用价值。

The finite element analysis theory was employed to simulate and analyze some common electrode patterns, in order to study the influence of projected capacitive touch panel electrode pattern on sensitivity, and improve the sensitivity of the touch panel from the design of the electrode pattern. Based on this analysis, several types of touch panel electrodes were designed, and the relationship between the electrode pattern and sensitivity was verified by the simulation of the touch panel with different electrodes. The experimental results show that the shape of "cross", "asterisk" and "snow" electrodes’ sensitivities increase by 1.122%, 4.149%, 5.779% respectively when compared with the sensitivity of the diamond electrode, and the improved "new snow" electrode’s sensitivity is 12.481% higher than that of diamond electrode, and the high sensitivity area is greatly increased. The relationship between the electrode pattern and the sensitivity of the touch panel has an important application value in the design of high-sensitivity touch panel.