US 8,896,328 B2 · Capacitive sensor device

Abstract

A processing system for a capacitive sensor device comprises circuitry and logic; and the capacitive sensor device comprises a first plurality of sensor electrodes and a second plurality of sensor electrodes. The processing system is configured to acquire a first plurality of capacitive measurements by emitting and receiving first electrical signals with the first plurality of sensor electrodes of the capacitive sensor device. The processing system is also configured to select a first set of the first plurality of sensor electrodes based on the first plurality of capacitive measurements. The processing system is further configured to acquire a second plurality of capacitive measurements by emitting second electrical signals with the first set of the first plurality of sensor electrodes and receiving the second electrical signals with the second plurality of sensor electrodes.

Claims24

Dependent claims

A processing system for a capacitive sensor device comprising a first plurality of sensor electrodes and a second plurality of sensor electrodes, said processing comprising circuitry and logic configured to:

acquire a first plurality of capacitive measurements by emitting and receiving first electrical signals with said first plurality of sensor electrodes of said capacitive sensor device, wherein the first plurality of capacitive measurements are absolute capacitive measurements,
select a first set of said first plurality of sensor electrodes based on said first plurality of capacitive measurements, and
acquire a second plurality of capacitive measurements by emitting second electrical signals with said first set of said first plurality of sensor electrodes and receiving said second electrical signals with said second plurality of sensor electrodes, wherein the second plurality of capacitive measurements are transcapacitive measurements.

A method of sensing using a capacitive sensor device comprising a first plurality of sensor electrodes and a second plurality of sensor electrodes, said method comprising:

acquiring a first plurality of capacitive measurements by emitting and receiving first electrical signals with said first plurality of sensor electrodes, wherein the first plurality of capacitive measurements are absolute capacitive measurements,
selecting a first set of said first plurality of sensor electrodes based on said first plurality of capacitive measurements, and
acquiring a second plurality of capacitive measurements by emitting second electrical signals with said first set of said first plurality of sensor electrodes and receiving said second electrical signals with said second plurality of sensor electrodes, wherein the second plurality of capacitive measurements are transcapacitive measurements.

A capacitive sensor device comprising:

a first plurality of sensor electrodes;
a second plurality of sensor electrodes;
and
a processing system coupled to said first plurality of sensor electrodes and said second plurality of sensor electrodes, said processing system configured to:
acquire a first plurality of capacitive measurements by emitting and receiving first electrical signals with said first plurality of sensor electrodes, wherein the first plurality of capacitive measurements are absolute capacitive measurements,
make a first estimate of a position of at least one input object using said first plurality of capacitive measurements,
select a first set of said first plurality of sensor electrodes using said first estimate,
acquire a second plurality of capacitive measurements by emitting second electrical signals with said first set of said first plurality of sensor electrodes and receiving said second electrical signals with said second plurality of sensor electrodes, wherein the second plurality of capacitive measurements are transcapacitive measurements, and
make a second estimate of said position of said at least one input object using said second plurality of capacitive measurements.

6 more elements

Dependencies are inferred from the claim text.

Capacitive sensor device

Life of this patent

Capacitive sensor device

Life of this patent

Abstract

Claims24