Patent ID: 9703428
Date: 2017-07-11
CPC Classifications: G06F

Claim:
1. A touch detecting method for a touch panel, wherein the touch panel comprises a plurality of driving electrodes and a plurality of sensing electrodes, the touch detecting method comprising: driving the plurality of driving electrodes simultaneously, and detecting a first change in a coupling capacitance between one said driving electrode and one said sensing electrode, wherein the first change is used to determine a first-type of sensing electrodes associated with a touch position and a second-type of sensing electrodes not associated with a touch position; multiplexing the first-type of sensing electrodes associated with the touch position to be generated driving electrodes, and multiplexing each of the plurality of driving electrodes to be a generated sensing electrode, wherein the second-type of sensing electrodes not associated with the touch position are not multiplexed to be generated driving electrodes, wherein a number of the generated driving electrodes is smaller than a number of the generated sensing electrodes; driving all the generated driving electrodes simultaneously, and detecting a second change in the coupling capacitance between each pair of one said generated driving electrode and one said generated sensing electrode to determine a first-type of drive electrodes associated with the touch position and a second-type of drive electrodes not associated with the touch position; and sequentially driving the first-type of driving electrodes associated with the touch position, and detecting a third change in coupling capacitance between each pair of one said first-type of driving electrodes and one said first-type of sensing electrodes to determine the touch position, wherein a number of the first-type of driving electrodes is smaller than a number of the plurality of driving electrodes, and wherein a number of the first-type of sensing electrodes is smaller than a number of the plurality of sensing electrodes.