| 摘要 |
<p>Disclosed are a circuit and a method for selecting coordinates in a differential touch sensing system which detects changes in capacitance according to touches in a differential mode. The circuit includes a first detecting unit which converts differential values of a portion, where a change in a differential signal is detected, into accumulated values, and which outputs a first detection information according to the accumulated values; a second detecting unit which outputs a second detection information according to the differential values; a water sensing unit which compares the first detection information with the second detection information and which outputs a selection signal as the result by determining the detection of water; and a coordinate selecting unit which selects one of first coordinates corresponding to the accumulated values and second coordinates corresponding to the differential values by the selection signal, and which outputs the selected one as coordinates corresponding to the touch.</p> |
