结构参数对电容触摸屏线性度的影响  

Effects of Structure Parameter on the Linearity of Capacitive Touch Panel

作　　者：朱维安[1] 郑寿云[1] 陈莉[1] 

机构地区：[1]汕头大学理学院物理系,广东汕头515063

出　　处：《汕头大学学报（自然科学版）》2009年第3期41-47,共7页Journal of Shantou University：Natural Science Edition

摘　　要：用ANSYS软件对二维电容触摸屏的结构参数进行计算和分析,讨论了结构参数对位置线性度的影响,并通过测试实验进行了验证.结果表明:触摸面电阻率与电极电阻率的比值γ会影响矩形电极结构电容触摸屏的线性度,γ越大,电容触摸屏的线性度越好,其合适的取值范围是γ>100;调整电容触摸屏位置坐标换算式中的参数κ能改善电容触摸屏的线性度;由负载电阻、电极结构和不均匀触摸面所引起的位置误差不可忽略.The two-dimensional capacitive touch panel is calculated and analyzed by ANSYS, and the influences of the capacitive touch panel construction, electrical parameters and the load on the device linearity are discussed. The conclusions are as following： It is the ratio（γ） of the touching-surface resistance to the electrode resistance that influenced the linearity of the square bordered capacitive touch panel, and the higher the ratio, the better the linearity. The appropriate value is γ 〉 100. The optimal factor r in the position formula effect on the linearity of capacitive touch panel, and the load, structure and the flatness of capacitive touch panel will cause additional position error.

关 键 词：电容触摸屏 结构参数 有限元分析 位置误差 

分 类 号：TP334.2[自动化与计算机技术—计算机系统结构] TP391.7[自动化与计算机技术—计算机科学与技术]