Method for determining change of initial distance of sensing electrode

A method for determining a capacitive sensing electrode having a change in an initial distance among all capacitive sensing electrodes in a touch screen, the initial distance being a distance before the capacitive sensing electrode being pressed, the method comprising:

• calculating a real-time pressures output by each sensing electrode according to real-time feature data output by each sensing electrode in the touch screen when a pressure is applied on the touch screen and a corresponding relationship between the feature data and the pressures;
• rectifying the real-time pressures output by each sensing electrode according to prestored relative elastic coefficients at different press positions relative to each sensing electrode, to obtain rectified real-time pressures;
• and
• determining the sensing electrode having a change in the initial distance among all the sensing electrodes according to a discrete degree of the rectified real-time pressures output by different sensing electrodes.