Projected Capacitive Touch Sensing
First Claim
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1. A projected capacitive touch sensing system comprising:
- a common plate electrode;
patterned capacitive touch sensing electrodes that are spaced apart from the common plate electrode, that are oriented parallel to the common plate electrode, and that are positioned such that pairs of adjacent patterned capacitive touch sensing electrodes experience a capacitance therebetween, where the capacitance between a pair of adjacent patterned capacitive touch sensing electrodes changes based on changes in a distance between the common plate electrode and the pair of adjacent patterned capacitive touch sensing electrodes;
deformable dielectric material positioned between the common plate electrode and the patterned electrodes; and
electronic circuitry configured to sense a change in capacitance between the pair of adjacent patterned capacitive touch sensing electrodes and determine an input based on the sensed change in capacitance between the pair of adjacent patterned capacitive touch sensing electrodes.
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Abstract
Methods, systems, and apparatus relate to touch sensors that are configured to measure input applied to the sensor from a user. Some implementations involve the measurement of changes in capacitance between pairs of adjacent patterned electrodes to detect input at a touch sensor.
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Citations
21 Claims
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1. A projected capacitive touch sensing system comprising:
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a common plate electrode; patterned capacitive touch sensing electrodes that are spaced apart from the common plate electrode, that are oriented parallel to the common plate electrode, and that are positioned such that pairs of adjacent patterned capacitive touch sensing electrodes experience a capacitance therebetween, where the capacitance between a pair of adjacent patterned capacitive touch sensing electrodes changes based on changes in a distance between the common plate electrode and the pair of adjacent patterned capacitive touch sensing electrodes; deformable dielectric material positioned between the common plate electrode and the patterned electrodes; and electronic circuitry configured to sense a change in capacitance between the pair of adjacent patterned capacitive touch sensing electrodes and determine an input based on the sensed change in capacitance between the pair of adjacent patterned capacitive touch sensing electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification