主权项 |
1. A touch device, comprising:
a touch panel, comprising a plurality of horizontal electrode-lines and a plurality of vertical electrode-lines crossing each other, wherein the plurality of horizontal electrode-lines and the plurality of vertical electrode-lines are electrically insulated to each other; and a sensing circuit, the sensing circuit comprising:
a scan signal generator, for generating a plurality of scan signals to the plurality of horizontal electrode-lines in a predetermined duration;a plurality of sensing units, coupled to plurality of vertical electrode-lines respectively, for sensing a capacitance variation of the plurality of vertical electrode-lines, so as to output a first sensing voltage and a second sensing voltage; anda subtractor, coupled to the plurality of sensing units, for sensing a difference between the first sensing voltage and the second sensing voltage, so as to output a horizontal voltage difference or a vertical voltage difference respectively;wherein the first sensing voltage and the second sensing voltage are outputted by one of the plurality of sensing units or by two adjacent sensing units, when the first sensing voltage and the second sensing voltage are outputted by one of the plurality of sensing units, the subtractor outputs the horizontal voltage difference corresponding to the two adjacent horizontal electrode-lines, when the first sensing voltage and the second sensing voltage are outputted by the two adjacent sensing units respectively, the subtractor outputs the vertical voltage difference corresponding to two adjacent vertical electrode-lines. |