Patent ID: 8773391
Filing Date: 2014-07-08
Classification: G06F

Abstract:
1. A resistive multi-touch device, comprising: a multi-wire resistive touch panel; a matrix, coupled to the multi-wire resistive touch panel, the matrix comprising: a scanning circuit, for detecting which column of the m pairs of first electrodes is touched to generate a first selecting signal and for detecting which row of the n pairs of second electrodes is touched to generate a second selecting signal according to a predetermined scanning mode; a first multiplexer, coupled to the m first positive electrodes or the m first negative electrodes and the scanning circuit, for selecting a first signal of the touched first positive electrode or the touched first negative electrode from signals transmitted on the m pairs of first electrodes according to the first selecting signal; a second multiplexer, coupled to the n second positive electrodes or the n second negative electrodes and the scanning circuit, for selecting a second signal of the touched second positive electrode or the touched second negative electrode from signals transmitted on the n pairs of second electrodes according to the second selecting signal; and a touch controller, coupled to the first multiplexer and the second multiplexer, for receiving the first signal and the second signal, and for calculating a coordinate value of a touched point according to the first signal and the second signal; wherein the predetermined scanning mode is a matrix scanning mode, and the scanning circuit detects which column of the m pairs of first electrodes is touched and detects which row of the n pairs of second electrodes is touched according to a second matrix; the second matrix is generated according to the touched columns of the m pairs of first electrodes and the touched rows of the n pairs of second electrodes; and the scanning circuit sequentially detects which point of the second matrix is touched one-by-one from a left-up corner to a right-down corner of the second matrix.