Patent ID: 8976143
Filing Date: 2015-03-10
Classification: G06F

Abstract:
1. A touch detecting method applied into a flat display device with an in-cell touch panel, the flat display device comprising a plurality of gate lines, a plurality of data lines, a plurality of sense units and a plurality of readout lines, the gate lines being arranged crossing over with the data lines and thereby dividing the flat display device into a plurality of pixel regions, the sense units being disposed into some of the pixel regions, each of the sense units being electrically coupled to a corresponding one of the gate lines and thereby being driven by a gate signal on the corresponding gate line, and each of the sense units being further electrically coupled to a corresponding one of the readout lines so as to electrically couple to a readout unit, and the touch detecting method comprising: enabling a sample signal during a period between driving the nearest gate line and driving the second nearest gate line preceding the corresponding gate line of one of the sense units, and sampling a readout signal by the readout unit on the corresponding readout line of the sense unit during a sample period corresponding to the sample signal being enabled, wherein the nearest gate line and the second nearest gate line preceding the corresponding gate line of one of the sense units are not connected to any one of the sense units; using the readout signal sampled by the readout unit during the sample period as a sample reference signal; enabling a sense readout signal during another period between driving the corresponding gate line and the nearest gate line succeeding the corresponding gate line of the sense unit, and reading out the readout signal by the readout unit on the corresponding readout line during a sense readout period corresponding to the sense readout signal being enabled, wherein the nearest gate line succeeding the corresponding gate line of the sense unit is not connected to any one of the sense units; using the readout signal read out by the readout unit during the sense readout period as a sense signal; and determining whether the sense unit is touched according to the sample reference signal and the sense signal; wherein a capacitance-coupling influence caused by inputted gate signals of gate line driving in the sample reference signal has a polarity same to that of another capacitance-coupling influence caused by inputted gate signals of gate line driving in the sense signal when displaying a specific pattern, resulting from the sample signal being enabled during the period between driving the nearest gate line and driving the second nearest gate line preceding the corresponding gate line of one of the sense units, and the sense readout signal being enabled during the another period between driving the corresponding gate line and the nearest gate line succeeding the corresponding gate line of the sense unit.