发明名称 |
METHOD FOR SCANNING PROJECTIVE CAPACITIVE TOUCH PANEL |
摘要 |
<p>The present invention relates to a method for scanning a projective capacitive touch panel. The method includes the following steps: scanning the mutual capacitance that are divided into at least two groups by applying different frequency excitation signals to different mutual capacitance groups, wherein a frequency of a excitation signal applied to a mutual capacitance group with greater RC constant is lower than that of a excitation signal applied to a mutual capacitance group with smaller RC constant; obtaining a first current voltage of each mutual capacitance; comparing the first current voltage with a first reference voltage to obtain candidate mutual capacitance whose first current voltage exceed the first reference voltage by a first threshold value; scanning the candidate mutual capacitance by applying a low frequency excitation signal; obtaining a second current voltage of each candidate mutual capacitance; comparing the second current voltage of each candidate mutual capacitance with a corresponding second reference voltage to obtain touched mutual capacitance whose second current voltage exceed the corresponding second reference voltage by a second threshold value.</p> |
申请公布号 |
EP2526472(A1) |
申请公布日期 |
2012.11.28 |
申请号 |
EP20100843721 |
申请日期 |
2010.09.07 |
申请人 |
TPK TOUCH SOLUTIONS (XIAMEN) INC.;TPK TOUCH SOLUTIONS (XIAMEN) INC. |
发明人 |
WANG, WANQIU;LIN, CHUN-JI |
分类号 |
G06F3/044;G06F3/041 |
主分类号 |
G06F3/044 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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