| 电容触摸屏的坐标定位分析 |
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| 引用本文： | 朱维安,郑寿云,陈莉. 电容触摸屏的坐标定位分析[J]. 电子测量技术, 2009, 32(5): 13-16 |
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| 作者姓名： | 朱维安 郑寿云 陈莉 |
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| 作者单位： | 汕头大学物理系,汕头,515063;汕头大学物理系,汕头,515063;汕头大学物理系,汕头,515063 |
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| 摘 要： | 描述了电容触摸屏直边形电极、直角形电极和矩形框电极的坐标定位算法。在忽略电极的电阻时,构建二维电容触摸屏的等效电路,推导了三种电极输出的触摸电流,用MATLAB计算电容触摸屏的坐标值,绘制了计算的坐标点图和位置误差图。结果表明：直边形电极、直角形电极和矩形框电极电容触摸屏的最大线性度分别是11.27%、23.91%和0.03%;线性度小于或等于1%的触摸面积分别是1mm2、9mm2和2500mm2;与实际的实验结果对比表明,电极是影响电容触摸屏坐标定位的重要因素。
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| 关 键 词： | 电容触摸屏 电极形状 坐标定位 位置误差 线性度 |
Analysis on coordinate positioning of capacitive touch panel |
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| Zhu Weian,Zheng Shoyun,Chen Li. Analysis on coordinate positioning of capacitive touch panel[J]. Electronic Measurement Technology, 2009, 32(5): 13-16 |
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| Authors: | Zhu Weian Zheng Shoyun Chen Li |
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| Affiliation: | Physical Department of Shantou University;Shantou 515063 |
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| Abstract: | Methods for coordinate positioning are given and described in the tetragon,the right-angle and the square electrode of the capacitive touch panel.When electrode-resistance was ignored,touching current output formula was analyzed by analyzing two dimensional equivalent circuits on capacitive touch panel.Coordinate calculation,coordinate-map and error-map of the capacitive touch panel was solved by MATLAB.The maximum linearity of them are 11.27%,23.91% and 0.03%,the area of the linearity within 1% are 1 mm2,9... |
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| Keywords: | capacitive touch panel electrode structure coordinate positioning position error linearity |
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