Patent ID: 8730193
Filing Date: 2014-05-20
Classification: G06F

Abstract:
1. A detection method for a capacitive touch screen for detecting touches or approaches of external conductive objects, comprising: providing a capacitive touch screen in the shape of a rectangle with two opposing long sides and two opposing short sides, the capacitive touch screen including: providing at least one of the first conductive strips with the driving signal from one of the long sides, and receiving the mutual capacitive coupling signals from the second conductive strips at one of the short sides when the at least one first conductive strip is being provided with the driving signal; and generating N−2 dual differential values based on the mutual capacitive coupling signals, where each dual differential value is obtained by subtracting between a difference between the mutual capacitive coupling signals of the first two second conductive strips among three adjacent second conductive strips and a difference between the mutual capacitive coupling signals of the last two second conductive strips among the three adjacent second conductive strips.