Patent ID: 8614686
Filing Date: 2013-12-24
Classification: G06F

Abstract:
1. A detection method for a capacitive touch screen, comprising: providing a capacitive touch screen, including: simultaneously and continuously providing the driving signal to at least one first conductive strip, and providing a DC signal to first conductive strips not driven by the driving signal; and generating sensing information based on the mutual capacitive coupling signals provided by the second conductive strips each time the driving signal being provided, wherein each value of the sensing information is the difference between a pair of second conductive strips or the difference between signal differences of two pairs of conductive strips among three conductive strips, and the difference suppresses noise coming from a display, wherein this conductive strip pattern allows that, when a touch area of each external conductive object on the capacitive touch screen is larger than a predetermined condition, the exposed area of the guarding pattern covered by each touch area is larger than the exposed area of the second conductive strips covered by the touch area or larger than the exposed area of the conductive strip pattern covered by the touch area.