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Method and apparatus for using oscillation signals with different phases to detect capacitance values at capacitive sensing nodes of touch panel
Method and apparatus for using oscillation signals with different phases to detect capacitance values at capacitive sensing nodes of touch panel
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机译:使用具有不同相位的振荡信号来检测触摸面板的电容感测节点处的电容值的方法和装置
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摘要
A method for detecting capacitance values of a plurality of capacitive sensing nodes located at intersections of a plurality of drive lines and a sense line on a touch panel is provided. The method includes at least the following steps: obtaining a plurality of touch sense signals corresponding to the sense line during a plurality of time slots, respectively; demodulating the touch sense signals with a first oscillation signal to generate a plurality of first demodulated signals; demodulating the touch sense signals with a second oscillation signal to generate a plurality of second demodulated signals, wherein the second oscillation signal is different from the first oscillation signal; and determining the capacitance values according to at least the first demodulated signals and the second demodulated signals.
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