Method and apparatus for determining touch position of capacitive screen

An apparatus for determining a touch position of a capacitive screen, comprising:

• a signal demodulating module, configured to acquire an output signal of each capacitor node, and orthogonally demodulate the output signal of each capacitor node to acquire a corresponding orthogonal component Q;
• a touch judging module, configured to judge whether there are a portion of capacitor nodes whose corresponding orthogonal components Q increase relative to a reference orthogonal component Q in an underwater mode, and whether there are a portion of capacitor nodes whose corresponding orthogonal components Q decrease relative to the reference orthogonal component Q in the underwater mode;
• and
• a position determining module, configured to determine that the capacitive screen is touched, and determine the touch position according to coordinates of the capacitor node whose orthogonal component Q decreases if it is judged that the capacitive screen is touched.

A non-volatile computer storage medium, storing a computer-executable instruction, wherein the computer-executable instruction, when being executed, is configured to cause a computing device to perform a method comprising:

• acquiring an output signal of each capacitor node of a capacitive screen, and orthogonally demodulating the output signal to acquire a corresponding orthogonal component Q;
• judging whether corresponding orthogonal components Q of some of the capacitor nodes increase relative to a reference orthogonal component Q in an underwater mode, and whether corresponding orthogonal components Q of some other capacitor nodes decrease relative to the reference orthogonal component Q in the underwater mode to obtain a positive result or a negative result;
• and
• determining that the capacitive screen is touched, and determining the touch position according to coordinates of the capacitor node whose orthogonal component Q decreases if the judgment indicates a positive result.