电子科技大学学报2016，Vol.45Issue(5)：763-766,4.DOI:10.3969/j.issn.1001-0548.2016.05.009
投射式电容触摸屏高精度驱动与检测方法
A High Precision Drive and Detection Method for Projected Capacitive Touch Panel
摘要
Abstract
Anti-noise performance is a key issue for the implementation of the projected capacitive touch-panel detection circuit. Based on an analysis of driving and sensing methods, a high-precision drive and detection method for projected capacitive touch panel is presented in this paper. Combining both the multiple electrode drive and the IQ(in-phase quadrature) demodulation method for touch sensing, an appropriately selected driving matrix can be designed to significantly reduce the noise aroused by the touch sensor system. In addition, the IQ demodulation method can be used to eliminate completely the phase delays caused by transmission paths. The results indicate that the proposed method can be used to design a high-performance controller chip for capacitive touch-panel detection circuit with a low cost.关键词
抗噪声技术/集成电路设计/IQ正交解调/多电极驱动/投射式电容触摸屏Key words
anti-noise/IC design/IQ demodulation/multiple electrode drive/projected capacitive touch panel分类
信息技术与安全科学引用本文复制引用
张晋芳,陈后金,张利达..投射式电容触摸屏高精度驱动与检测方法[J].电子科技大学学报,2016,45(5):763-766,4.基金项目
北京市科技计划课题项目(D151100000415002) （D151100000415002）
