Touch Sensor With Simultaneously Driven Drive Electrodes
AssigneeAtmel Corporation
InventorsVemund Kval Bakken, Izhar Bentov, Vivek Pant, Shahrooz Shahparnia
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Abstract
In one embodiment, a method comprises generating, by a controller, a plurality of drive signals. The method further includes simultaneously transmitting, by the controller, the plurality of drive signals to a plurality of drive electrodes disposed on a touch sensor. The method further includes sensing a sense electrode of a plurality of sense electrodes disposed on the touch sensor. The sensing comprises measuring, for each drive electrode of the plurality of drive electrodes, at least one value indicative of a capacitance between the sense electrode and the drive electrode.
Claims20
A device comprising:
- a touch sensor comprising:
- a substrate;
- a plurality of drive electrodes disposed on the substrate;
- and
- a plurality of sense electrodes disposed on the substrate;
- a controller coupled to the plurality of drive electrodes and the plurality of sense electrodes, the controller comprising:
- a drive unit configured to generate a plurality of drive signals that each have a different dominant frequency and simultaneously drive the plurality of drive electrodes with the plurality of drive signals;
- and
- a sense unit configured to select a sense electrode of the plurality of sense electrodes through a demultiplexer coupled to at least two of the plurality of sense electrodes and to sense the selected sense electrode by measuring, for each drive electrode of the plurality of drive electrodes, at least one value that is indicative of a capacitance between the selected sense electrode and the drive electrode;
- a transparent cover panel overlaying at least a portion of the touch sensor;
- and
- an electronic display.
An apparatus comprising:
- a plurality of drive electrodes disposed on a touch sensor;
- a plurality of sense electrodes disposed on the touch sensor;
- and
- at least one controller coupled to the plurality of drive electrodes and the plurality of sense electrodes, the at least one controller comprising:
- a drive unit operable to simultaneously drive each of the plurality of drive electrodes;
- and
- a sense unit operable to select a sense electrode of the plurality of sense electrodes through a demultiplexer coupled to at least two of the plurality of sense electrodes and to sense the selected sense electrode by measuring, for each drive electrode of the plurality of drive electrodes, at least one value indicative of a capacitance between the selected sense electrode and the drive electrode.
A method comprising:
- generating, by a controller, a plurality of drive signals;
- simultaneously transmitting, by the controller, the plurality of drive signals to a plurality of drive electrodes disposed on a touch sensor;
- selecting, by a multiplexer, a sense electrode of a plurality of sense electrodes disposed on the touch sensor;
- and
- sensing the selected sense electrode, the sensing comprising measuring, for each drive electrode of the plurality of drive electrodes, at least one value indicative of a capacitance between the selected sense electrode and the drive electrode.
Dependencies are inferred from the claim text.