US 9,542,042 B2 · Scanning a single-layer capacitive sense array

Abstract

A method performs a scan operation for a single-layer sensor array that includes transmit (TX) electrodes and receive (RX) electrodes. The method includes determining whether to include a signal value for an RX electrode in a computation of a slope parameter value for a TX electrode. The method computes an index sum based on an index of the RX electrode when the signal value for the RX electrode is included in the computation of the slope parameter value for the TX electrode. The method computes a signal sum based on the signal value for the RX electrode when the signal value for the RX electrode is included in the computation of the slope parameter value for the TX electrode. The method then computes the slope parameter value for the TX electrode based on the signal sum and the index sum.

Claims20

Dependent claims

A method of performing a scan operation for a single-layer sensor array comprising transmit (TX) electrodes and receive (RX) electrodes, the method comprising a set of operations, including:

(a) determining, by a processing device, whether to include a signal value for an RX electrode in a computation of a slope parameter value for a TX electrode;
(b) computing, by the processing device, an index sum based on an index of the RX electrode when the signal value for the RX electrode is included in the computation of the slope parameter value for the TX electrode;
(c) computing, by the processing device, a signal sum based on the signal value for the RX electrode when the signal value for the RX electrode is included in the computation of the slope parameter value for the TX electrode;
and
(d) computing, by the processing device, the slope parameter value for the TX electrode based on the signal sum and the index sum.

2 more elements

A non-transitory computer-readable medium storing a set of instructions for performing a scan operation for a single-layer sensor array comprising transmit (TX) electrodes and receive (RX) electrodes, the set of instructions including instructions which, when executed by a processing device, cause the processing device to perform operations comprising:

(a) determining whether to include a signal value for an RX electrode in a computation
of a slope parameter value for a TX electrode;
(b) computing an index sum based on an index of the RX electrode when the signal value for the RX electrode is included in the computation of the slope parameter value for the TX electrode;
(c) computing a signal sum based on the signal value for the RX electrode when the signal value for the RX electrode is included in the computation of the slope parameter value for the TX electrode;
and
(d) computing the slope parameter value for the TX electrode based on the signal sum and the index sum.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/514,654Filed 15 Oct 2014 · continuation

Priority

24 Feb 2011

Published

US 2015/0062093 A15 Mar 2015

Granted

10 Jan 2017

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G06F 3/0418
Control or interface arrangements specially adapted for digitisers: for error correction or compensation, e.g. based on parallax, calibration or…
G01N 27/22
By investigating impedance: by investigating capacitance
G01R 35/005
Testing or calibrating of apparatus covered by the other groups of this subclass: calibrating; Standards or reference devices, e.g. voltage or…
G06F 3/0443
By capacitive means: using a single layer of sensing electrodes

Family

Application61/446,178Us provisional application · filed 24 Feb 2011

Application61/559,590Us provisional application · filed 14 Nov 2011

Application13/405,071Parent of this continuation-in-part · filed 24 Feb 2012

Application61/754,028Us provisional application · filed 18 Jan 2013

Application13/800,468Parent of this continuation-in-part · filed 13 Mar 2013

Application61/785,131Us provisional application · filed 14 Mar 2013

Application14/038,423Parent of this continuation · filed 26 Sep 2013

US 2015/0062093 A1Pre-grant publication · published 5 Mar 2015

US 8,866,491 B2Parent of this continuation

US 8,866,490 B1Parent of this continuation-in-part

Application14/038,423Parent of this continuation-in-part

US 2012/0227259 A1Published application

US 2014/0192027 A1Published application

US 9,952,737 B2Related patent

US 9,542,042 B2This patent

From the US filing history. Foreign family members aren’t listed.

Scanning a single-layer capacitive sense array

Life of this patent

Scanning a single-layer capacitive sense array

Life of this patent

Abstract

Claims20