Patent ID: 9437169
Filing Date: 2016-09-06
CPC Classification: G06F,G09G

Claim Text:
1. A touch panel control circuit configured to connect to a touch panel comprising a first plurality of electrodes arranged in a first direction and a second plurality of electrodes arranged in a second direction, wherein the first plurality of electrodes intersect the second plurality of electrodes to form a plurality of intersection capacitors, the touch panel control circuit comprising: a plurality of drive circuits configured to drive the first plurality of electrodes; and a plurality of detection circuits coupled to the second plurality of electrodes, each detection circuit of the plurality of detection circuits including a corresponding switched capacitor circuit and a corresponding integration circuit coupled to an output node of the corresponding switched capacitor circuit, wherein the detection circuits of the plurality of detection circuits are configured to detect a plurality of capacitance values of the plurality of intersection capacitors, wherein the drive circuits of the plurality of drive circuits are configured to apply a first number of pulses, the first number being at least two, to the first plurality of electrodes within a predetermined period, wherein each switched capacitor circuit is configured to receive an input signal from the second plurality of electrodes and to operate with a sampling frequency which is same or multiple times higher than a frequency of the pulses and in synchronization with the pulses, and wherein each integration circuit is configured to operate in synchronization with the pulses.