Capacitive touch screen

摘要

The present invention provides a mutual capacitive multi-touch screen. The conductive strip pattern allows that, when a touch range of each external conductive object on the mutual capacitive multi-touch screen is larger than a predetermined condition, capacitive coupling between each external conductive object and first conductive strip is greater than capacitive coupling between each external conductive object and second conductive strip, such that the proportion of a driving signal flowing out of the first conductive strip via at least one first external conductive object in the external conductive objects and into the second conductive strip via at least one second external conductive object in the external conductive objects decreases as the number of second external conductive objects increases.

主权项

1. A detecting circuit, applied to a touch system including a touch panel and a display, wherein the touch panel includes a plurality of electrodes facing each other, and the electrodes including a plurality of first electrodes operatively provided with a driving signal during mutual capacitive detection and a plurality of second electrodes providing mutual capacitive coupling signals, wherein the second electrodes includes a first detecting electrode, a second detecting electrode and a third electrode parallelized continuously, and the detecting circuit executes the following operations:
detecting signals of the second electrodes to generate a plurality of differences comprising a first difference and a second difference, wherein the first difference is the difference between the signals of the first detecting electrode and the second detecting electrode, and the second difference is the difference between the signals of the second detecting electrode and the third detecting electrode, wherein when the display updates frames during detection by the detecting circuit, the signals of the second electrodes comprises the mutual capacitive coupling signals and noises from the display, and the differences suppresses the noises.