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Microsoft patents touch screen calibration that fixes weak signals

Patent drawing
Patent drawing from the official filing.

This filing describes a method for improving the accuracy of touchscreens by adjusting for variations in the sensor's electrical response. The system scans the touch sensor and uses a mathematical grid to correct signal readings, filling in gaps where the signal is too weak by looking at nearby data points.

Why it mattersIt helps ensure that touchscreens register taps accurately even if parts of the sensor are slightly weaker or inconsistent, which is a standard part of making hardware reliable.

In the filing’s own words

A method for calibrated touch sensing on an electronic device comprises: (a) scanning driven electrodes of a touch sensor while recording signal from sensory electrodes of the touch sensor; (b) storing the signal in a signal matrix; (c) for each element in the signal matrix that is lower than a predetermined threshold, adjusting a corresponding element in the calibration matrix based at least partly on a value of the element in the signal matrix and on a value of the corresponding element in the calibration matrix; (d) for each element in the signal matrix that is above the predetermined threshold, estimating the corresponding element in the calibration matrix based at least partly on one or more elements neighboring the corresponding element in the calibration matrix; and (e) returning a calibrated signal value based at least partly on corresponding values in the signal and calibration matrices.

What exactly they claim (claim 1)

1. A method for calibrated touch sensing on an electronic device, the method comprising: scanning a series of driven electrodes of a touch sensor while recording signal from a series of sensory electrodes of the touch sensor; storing the signal in a signal matrix having a row corresponding to each row of a calibration matrix and a column corresponding to each column of the calibration matrix; for each element in the signal matrix that is lower than a predetermined threshold, adjusting a corresponding element in the calibration matrix based at least on a value of the element in the signal matrix and on a value of the corresponding element in the calibration matrix; for each element in the signal matrix that is above the predetermined threshold, estimating the corresponding element in the calibration matrix based at least on one or more elements neighboring the corresponding element in the calibration matrix; and returning a calibrated signal value based at least on the value of an element in the signal matrix and of a corresponding element in the calibration matrix.

Facts

Company
Microsoft (Microsoft Technology Licensing, LLC)
Official title
TOUCH-SENSOR CALIBRATION
Publication number
US20260329400A1
Application number
19184625
Filed
Apr 21, 2025
Published
Oct 22, 2026
Inventors
3
Claims
20

Classified under

G06F 3/0418 Physics & computingG06F 3/04166 Physics & computingG06F 3/0446 Physics & computing
Read the full filing (official PDF) ↗ Open in the Patent Tracker

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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.