Method and device for sensing control point on capacitive-type panel

A device for sensing a control point on a capacitive-type panel, where a conductive object approaches or contacts, the capacitive-type panel including M signal transmitting lines and N signal receiving lines defining M*N neighboring regions, the device comprising:

• a charge/discharge signal generator electrically connected to the M signal transmitting lines, the charge/discharge signal generator simultaneously inputting a first charge/discharge signal and a second charge/discharge signal respectively to two sets of signal transmitting lines selected from the M signal transmitting lines during a specified time period, wherein a rising edge of the first charge/discharge signal is aligned with a falling edge of the second charge/discharge signal, or a falling edge of the first charge/discharge signal is aligned with a rising edge of the second charge/discharge signal;
• and
• a voltage signal processor electrically connected to the N signal receiving lines, the voltage signal processor receiving a first voltage signal and a second voltage signal respectively from two sets of signal receiving lines selected from the N signal receiving lines during the specified time period wherein the specified time period is completely within a single charging period immediately after the rising edge of the first charge/discharge signal or the second charge/discharge signal, operating the first voltage signal and the second voltage signal to generate a characteristic value for a neighboring region defined by the two sets of signal transmitting lines and the two sets of signal receiving lines, wherein
• the above steps are repetitively performed so as to generate a plurality of characteristic values for a plurality of neighboring regions defined by different combinations of signal transmitting lines and signal receiving lines, and position information of at least one control point on the capacitive-type panel is estimated according to the characteristic values.

A method for sensing a control point on a capacitive-type panel, where a conductive object approaches or contacts, the capacitive-type panel including M signal transmitting lines and N signal receiving lines defining M*N neighboring regions, the method being executed by a sensing device and comprising steps of:

• simultaneously transmitting a charge signal and a discharge signal through two sets of signal transmitting lines selected from the M signal transmitting lines, respectively, wherein a rising edge of the charge signal is aligned with a falling edge of the discharge signal;
• receiving a first voltage signal and a second voltage signal through two sets of signal receiving lines selected from the N signal receiving lines in response to the charge signal and the discharge signal, respectively, wherein the receiving step is completely performed within a single charging period immediately after the rising edge of the charge signal;
• and
• operating the first voltage signal and the second voltage signal to generate a characteristic value for a neighboring region defined by the two sets of signal transmitting lines and the two sets of signal receiving lines,
• wherein the above steps are repetitively performed so as to generate a plurality of characteristic values for a plurality of neighboring regions defined by different combinations of signal transmitting lines and signal receiving lines, and position information of at least one control point on the capacitive-type panel is estimated according to the characteristic values.