Patent ID: 8614684

Claim:
A detection method for a capacitive touch screen, comprising: providing a capacitive touch screen, including: a conductive strip pattern having a plurality of conductive strips exposed from each other, the conductive strip pattern including: a plurality of first conductive strips operatively provided with a driving signal during mutual capacitive detection; and a plurality of second conductive strips providing mutual capacitive coupling signals, the first conductive strips and the second conductive strips being exposed and separated from each other; and a guarding pattern, the guarding pattern and the conductive strip pattern being exposed from each other, wherein when the driving signal is not provided and at least a part of skin of a human body approaches or touches the guarding pattern, a skin stimulated signal is provided to the guarding pattern such that the part of skin perceives the signal feedback of the capacitive touch sensor in the form of a slight electric shock sensation; 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.