Controlling method and touch panel using the same

A touch panel, comprising:

• a panel capacitor;
• a first circuit coupled to a first terminal of the panel capacitor, and configured to transmit a scan signal to the panel capacitor;
• a first capacitor, wherein a first terminal of the first capacitor is coupled to a second terminal of the panel capacitor;
• a second circuit coupled to a second terminal of the first capacitor, and configured to transmit an inverting signal to the first capacitor, wherein the inverting signal is synchronized with the scan signal, a frequency of the inverting signal is identical to a frequency of the scan signal, and the inverting signal is phase-inverted from the scan signal;
• and
• a controlling circuit coupled to the second terminal of the panel capacitor, and configured to output a touch signal in response to a voltage at the second terminal of the panel capacitor, wherein the touch signal is configured to estimate a capacitance of the panel capacitor.