Patent ID: 8624873
Filing Date: 2014-01-07
Classification: G06F

Abstract:
1. A method for detecting a touch spot of a touch panel, the touch panel comprising a conductive film and a plurality of electrode pairs, the conductive film defining a first impedance direction and a second impedance direction substantially perpendicular to the first impedance direction, the plurality of electrode pairs being arranged along the first impedance direction, each of the plurality of electrode pairs comprising a first driving electrode and a second driving electrode separately located on two opposite sides of the conductive film, the method comprising: scanning the plurality of electrode pairs along the first impedance direction to obtain a plurality of electrical signals for determining a first coordinate of the touch spot; selecting a plurality of electrode pairs near the first coordinate to obtain an electrode pair signal P scanning first driving electrodes of the plurality of selected electrode pairs to obtain a first signal M scanning second driving electrodes of the plurality of selected electrode pairs to obtain a second signal N determining a second coordinate of the touch spot according to the electrode pair signal P determining a second coordinate by a formula when P sum >abs(N sum −M sum ) and N sum ≧M sum ; and determining a second coordinate by a formula when P sum >abs(N sum −M sum ) and N sum <M sum , wherein abs represents an absolute value, and y represents a distance between the two opposite sides along the second impedance direction.