Patent ID: 9329735
Filing Date: 2016-05-03
CPC Classification: G01D,G06F

Claim Text:
1. A touch circuit chip, comprising: a load adjustment unit configured to adjust a determined impedance value according to an impedance matching signal; and a first comparator having a first end, a second end and an output end, the first end of the first comparator being electrically coupled to a sensing electrode and from which to receive a sensing signal, the second end of the first comparator being electrically coupled to the load adjustment unit, and the load adjustment unit being coupled to a driving electrode, the second end of the first comparator receiving a reference signal from the driving electrode, the first comparator being configured to compare a voltage of the received sensing signal with a voltage of the received reference signal and accordingly output a comparison result via the output end thereof, the touch circuit chip being configured to determine whether there exists a change of a capacitance value of a coupling capacitor formed at an intersecting point resulted by the intersection of the sensing electrode and the driving electrode according to the comparison result, wherein the determined impedance value is matched to the impedance value of the coupling capacitor and the sensing electrode.