Single layer multi-touch capacitive sensor
First Claim
1. A method for operating a capacitive sensing device, the method comprising:
- providing a substrate having a plurality of pairs of conductive traces formed thereon, each of the plurality of pairs of conductive traces comprising a first conductive trace having at least one sub-trace and a second conductive trace having at least one sub-trace, wherein within each of the plurality of pairs of conductive traces at least one sub-trace of the first conductive trace is interleaved with at least one sub-trace of the second conductive trace, each sub-trace of the first and second conductive traces having a variable width from a first end to a second end thereof;
measuring a capacitance variation of a plurality of the first conductive traces and a plurality of the second conductive traces, wherein the capacitance variation of at least some of the second conductive traces is measured before the capacitance variation for all of the plurality of first conductive traces is measured; and
determining a position coordinate in a two-dimensional coordinate system on the capacitive sensing device based on the measuring a capacitance variation of a plurality of the first conductive traces and a plurality of the second conductive traces.
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Accused Products
Abstract
Embodiments described herein provide capacitive sensing devices and methods. A substrate having a plurality of pairs of conductive traces formed thereon is provided. The pairs of conductive traces include first and second conductive traces having first and second opposing ends. A capacitance variation of a plurality of the first conductive traces and a plurality of the second conductive traces is measured. The capacitance variation of at least some of the second conductive traces is measured before the capacitance variation for all of the plurality of first conductive traces is measured. A position coordinate in a two-dimensional coordinate system on the capacitive sensing device is determined based on the measuring a capacitance variation of a plurality of the first conductive traces and a plurality of the second conductive traces.
60 Citations
20 Claims
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1. A method for operating a capacitive sensing device, the method comprising:
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providing a substrate having a plurality of pairs of conductive traces formed thereon, each of the plurality of pairs of conductive traces comprising a first conductive trace having at least one sub-trace and a second conductive trace having at least one sub-trace, wherein within each of the plurality of pairs of conductive traces at least one sub-trace of the first conductive trace is interleaved with at least one sub-trace of the second conductive trace, each sub-trace of the first and second conductive traces having a variable width from a first end to a second end thereof; measuring a capacitance variation of a plurality of the first conductive traces and a plurality of the second conductive traces, wherein the capacitance variation of at least some of the second conductive traces is measured before the capacitance variation for all of the plurality of first conductive traces is measured; and determining a position coordinate in a two-dimensional coordinate system on the capacitive sensing device based on the measuring a capacitance variation of a plurality of the first conductive traces and a plurality of the second conductive traces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A capacitive sensing device comprising:
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a capacitive sensing array comprising; a substrate; and a plurality of pairs of conductive traces formed on the substrate, each of the plurality of pairs of conductive traces comprising a first conductive trace having at least one sub-trace and a second conductive trace having at least one sub-trace, wherein within each of the plurality of pairs of conductive traces at least one sub-trace of the first conductive trace is interleaved with at least one sub-trace of the second conductive trace, each sub-trace of the first and second conductive traces having a variable width from a first end to a second end thereof; and a processing device coupled to the capacitive sensing array, the processing device being configured to; measure a capacitance variation of a plurality of the first conductive traces and a plurality of the second conductive traces, wherein the capacitance variation of at least some of the second conductive traces is measured before the capacitance variation for all of the plurality of first conductive traces is measured; and determine a position coordinate in a two-dimensional coordinate system on the capacitive sensing device based on the measuring a capacitance variation of a plurality of the first conductive traces and a plurality of the second conductive traces. - View Dependent Claims (12, 13, 14, 15)
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16. A method for operating a capacitive sensing device, the method comprising:
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providing a substrate having a plurality of pairs of conductive traces formed thereon, the plurality of pairs of conductive traces being arranged in a plurality of rows, each of the plurality of pairs of conductive traces comprising a first conductive trace having at least one sub-trace and a second conductive trace having at least one sub-trace, wherein within each of the plurality of pairs of conductive traces at least one sub-trace of the first conductive trace is interleaved with at least one sub-trace of the second conductive trace, each sub-trace of the first and second conductive traces having a variable width from a first end to a second end thereof and being substantially aligned with the plurality of rows; measuring a capacitance variation of a plurality of the first conductive traces and a plurality of the second conductive traces in an alternating manner; and determining the presence of an object relative to the substrate based on the measuring a capacitance variation of a plurality of the first conductive traces and a plurality of the second conductive traces. - View Dependent Claims (17, 18, 19, 20)
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Specification