SYSTEM AND METHOD FOR SENSING MULTIPLE INPUT OBJECTS WITH GRADIENT SENSOR DEVICES
First Claim
1. A gradient sensor device comprising:
- a transmitter electrode;
a receiver electrode; and
a processing system communicatively coupled to the transmitter electrode and the receiver electrode, the processing system configured to;
drive the transmitter electrode with a first drive signal to produce a first voltage gradient across the transmitter electrode, wherein the first voltage gradient is non-linear;
receive a first resulting signal with the receiver electrode, the first resulting signal comprising effects of the first voltage gradient; and
determine positional information for a plurality of input objects located simultaneously within a sensing region along the transmitter electrode based on the first resulting signal.
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Accused Products
Abstract
A processing system for an input device includes a transmitter module including transmitter circuitry, a receiver module, and a determination module. The transmitter module is configured to drive the transmitter electrode with a first drive signal to produce a first voltage gradient across the transmitter electrode, wherein the first voltage gradient is non-linear. The receiver module is configured to receive a first resulting signal with a receiver electrode, the resulting signal comprising effects of the first voltage gradient. The determination module is configured to determine positional information for a plurality input objects located simultaneously within a sensing region along the transmitter electrode based on the first resulting signal.
16 Citations
20 Claims
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1. A gradient sensor device comprising:
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a transmitter electrode; a receiver electrode; and a processing system communicatively coupled to the transmitter electrode and the receiver electrode, the processing system configured to; drive the transmitter electrode with a first drive signal to produce a first voltage gradient across the transmitter electrode, wherein the first voltage gradient is non-linear; receive a first resulting signal with the receiver electrode, the first resulting signal comprising effects of the first voltage gradient; and determine positional information for a plurality of input objects located simultaneously within a sensing region along the transmitter electrode based on the first resulting signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A processing system for an input device, the processing system comprising:
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a transmitter module including transmitter circuitry, the transmitter module configured to drive a transmitter electrode with a first drive signal to produce a first voltage gradient across the transmitter electrode, wherein the first voltage gradient is non-linear; a receiver module, the receiver module configured to receive a first resulting signal with a receiver electrode, the first resulting signal comprising effects of the first voltage gradient; and a determination module configured to determine positional information for a plurality input objects located simultaneously within a sensing region along the transmitter electrode based on the first resulting signal. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method of capacitive sensing, the method comprising:
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driving a transmitter electrode with a first drive signal to produce a first voltage gradient across the transmitter electrode, wherein the first voltage gradient is non-linear; receiving a first resulting signal with a receiver electrode, the first resulting signal comprising effects of the first voltage gradient; and determining positional information for a plurality input objects located simultaneously within a sensing region along the transmitter electrode based on the first resulting signal. - View Dependent Claims (17, 18, 19, 20)
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Specification