Combining sensor electrodes in a matrix sensor
First Claim
Patent Images
1. A processing system for an input device, the input device having a plurality of sensor electrodes arranged in a matrix, the processing system comprising:
- a sensor module having sensor circuitry configured to;
drive a first set of the sensor electrodes during a first time period to determine a first aggregate capacitive coupling between the first set of sensor electrodes and an input object, the first aggregate capacitive coupling determined based on resulting signals received on individual sensor electrodes of the first set of the sensor electrodes;
drive a second set of the sensor electrodes during a second time period to determine a second aggregate capacitive coupling between the second set of sensor electrodes and the input object, the second aggregate capacitive coupling determined based on resulting signals received on individual sensor electrodes of the second set of the sensor electrodes, wherein the first set and the second set comprise at least one sensor electrode in common and at least one sensor electrode not in common; and
drive a third set of the sensor electrodes during a third time period to determine a third aggregate capacitive coupling between the third set of the sensor electrodes and the input object, wherein the third time period and the second time period at least partially overlap.
2 Assignments
0 Petitions
Accused Products
Abstract
A display device having a capacitive sensing device, a processing system, and a method are provided for detecting presence of an input object using a capacitive sensing device having a plurality of sensor electrodes arranged in a matrix. The described technique programmatically combines multiple sensor electrodes into a larger sensor electrode for absolute capacitive sensing. The sets of sensor electrodes that are combined may be selectively coupled based a window size and a step size associated with a number of sensor electrodes in common between the sets.
118 Citations
19 Claims
-
1. A processing system for an input device, the input device having a plurality of sensor electrodes arranged in a matrix, the processing system comprising:
a sensor module having sensor circuitry configured to; drive a first set of the sensor electrodes during a first time period to determine a first aggregate capacitive coupling between the first set of sensor electrodes and an input object, the first aggregate capacitive coupling determined based on resulting signals received on individual sensor electrodes of the first set of the sensor electrodes; drive a second set of the sensor electrodes during a second time period to determine a second aggregate capacitive coupling between the second set of sensor electrodes and the input object, the second aggregate capacitive coupling determined based on resulting signals received on individual sensor electrodes of the second set of the sensor electrodes, wherein the first set and the second set comprise at least one sensor electrode in common and at least one sensor electrode not in common; and drive a third set of the sensor electrodes during a third time period to determine a third aggregate capacitive coupling between the third set of the sensor electrodes and the input object, wherein the third time period and the second time period at least partially overlap. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
8. An input device comprising:
-
a plurality of sensor electrodes arranged in a matrix comprising N rows having at least two sensor electrodes per row and M columns having at least two sensor electrodes per column; a processing system coupled to the plurality of sensor electrodes, the processing system configured to; couple to and drive a first set of the sensor electrodes during a first time period to determine a first aggregate capacitive coupling between the first set of sensor electrodes and an input object, the first aggregate capacitive coupling determined based on resulting signals received on individual sensor electrodes of the first set of the sensor electrodes; couple to and drive a second set of the sensor electrodes during a second time period to determine a second aggregate capacitive coupling between the second set of sensor electrodes and the input object, the second aggregate capacitive coupling determined based on resulting signals received on individual sensor electrodes of the second set of the sensor electrodes, wherein the first set and the second set comprise at least one sensor electrode in common and at least one sensor electrode not in common; couple to and drive a third set of the sensor electrodes during a third time period to determine a third aggregate capacitive coupling between the third set of the sensor electrodes and the input object, wherein the third time period and the second time period at least partially overlap; and determine positional information for the input object based on the first and second aggregate capacitive couplings. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
-
-
16. A method for operating an input device, the method comprising:
-
driving a first set of a plurality of sensor electrodes during a first time period to determine a first aggregate capacitive coupling between the first set of sensor electrodes and an input object, the first aggregate capacitive coupling determined based on resulting signals received on individual sensor electrodes of the first set of the sensor electrodes, wherein the plurality of sensor electrodes are arranged in a matrix comprising N rows having at least two sensor electrodes per row and M columns having at least two sensor electrodes per column; driving a second set of the plurality of sensor electrodes during a second time period to determine a second aggregate capacitive coupling between the second set of sensor electrodes and the input object, the second aggregate capacitive coupling determined based on resulting signals received on individual sensor electrodes of the second set of the sensor electrodes, wherein the first set and the second set comprise at least one sensor electrode in common and at least one sensor electrode not in common; driving a third set of the sensor electrodes during a third time period to determine a third aggregate capacitive coupling between the third set of the sensor electrodes and the input object, wherein the third time period and the second time period at least partially overlap; and determining positional information for the input object based on the first and second aggregate capacitive couplings. - View Dependent Claims (17, 18, 19)
-
Specification