US 2015/0029137 A1 · NOISE COMPENSATING TOUCH PANEL AND TOUCH DEVICE THEREOF

Abstract

A noise compensating touch panel includes a touch module and a signal compensating module. The touch module includes transmission electrodes and sensing electrodes. The signal compensating module has a first input, a second input and an output. The signal compensating module couples to the touch module. The transmission electrodes receive scanning voltage signals sequentially. When the scanning voltage signals sense the touching by object at crossover points of a first transmission electrode and the sensing electrodes, the sensing electrodes provide sensing signals. The sensing signals include the value of a first parasitical capacitor. The second transmission electrode senses the value of a second parasitical capacitor which the second transmission electrode isn't touched by object when the second transmission electrode receives the scanning voltage signals. Then the second transmission electrode provides compensating signals. Signal compensating module receives the sensing signals and the compensating signals separately.

Claims20

Dependent claims

A noise compensating touch panel, comprising:

a touch module, comprising:
a plurality of transmission electrodes, for sequentially receiving at least one scanning voltage;
a plurality of sensing electrodes, for providing at least a sensing signal when the scanning voltage senses an object touching at at least one crossover node of a first transmission electrode and the plurality of sensing electrodes, wherein the sensing signal comprises capacitance of a first parasitic capacitor;
wherein when a second transmission electrode receives the scanning voltage, the second transmission electrode senses capacitance of a second parasitic capacitor corresponding to when the second transmission electrode has not been touch by the object, for providing a compensating signal;
and
a signal compensating module, coupled to the touch module, the signal compensating module comprising a first input terminal, a second input terminal and an output terminal, wherein the first input terminal and the second input terminal receive the sensing signal and the compensating signal respectively, for providing a determining voltage at the output terminal.

3 more elements

A touch device, comprising:

a touch panel, comprising:
a touch module, comprising:
a plurality of transmission electrodes, for sequentially receiving at least one scanning voltage;
a plurality of sensing electrodes, for providing at least a sensing signal when the scanning voltage senses an object touching at at least one crossover node of a first transmission electrode and the plurality of sensing electrodes, wherein the sensing signal comprises capacitance of a first parasitic capacitor;
wherein when a second transmission electrode receives the scanning voltage, the second transmission electrode senses capacitance of a second parasitic capacitor corresponding to when the second transmission electrode has not been touch by the object, for providing a compensating signal;
and
a signal compensating module, coupled to the touch module, the signal compensating module comprising a first input terminal, a second input terminal and an output terminal, wherein the first input terminal and the second input terminal receive the sensing signal and the compensating signal respectively, for providing a determining voltage at the output terminal;
and
a load, coupled to the touch panel, for receiving the determining voltage to operate.

6 more elements

Dependencies are inferred from the claim text.

Noise compensating touch panel and touch device thereof

Life of this patent

Noise compensating touch panel and touch device thereof

Life of this patent

Abstract

Claims20