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Microsoft patents touchscreens that tell fingers from water drops

Patent drawing
Patent drawing from the official filing.

Microsoft describes a method for touchscreens and touchpads to analyze the shape, size, and movement of touches to distinguish between a user's finger and other contacts like water or a stylus. By identifying these different types of touches, the system can ignore accidental inputs from moisture or palms, reducing false clicks and saving processing power.

Why it mattersThis could make touchscreens more reliable in real-world conditions, such as when hands are wet or when using a stylus, by preventing accidental inputs.

In the filing’s own words

A capacitive touch interface with touch type profiling and classification improves accuracy in classifying touch events, allowing users to interact with touch devices (e.g., touchscreens and touchpads) more naturally. Resources are conserved by avoiding reporting, processing, actions and reversals for non-input touch events. Touch features are extracted from a touch event dataset, e.g., touch location, size, shape, duration, consistency, capacitance intensity, dynamics (e.g., shape change, movement pattern), clustering, palm indication, etc. Touch events are classified (e.g., as touch input, instrument input, palm touch, moisture) based on touch profiles indicated by touch features. For example, a moisture profile can include irregular touch shapes, weak or inconsistent capacitance measurements, and/or an abnormal contact dynamic. Feedback can be provided at touchpoints classified as input and/or non-input. Different feedback can be provided for different classes, such as a moisture indication to the user and/or to the operating system to remove or counteract moisture.

What exactly they claim (claim 1)

1. A computing device that includes a touch device, the computing device comprising: at least one processing device; and at least one memory device to store program code executable by the at least one processing device to: perform data collection to generate a dataset associated with touch events on the touch device; determine touch features for the touch events from the dataset, wherein the touch features include at least a shape change of the touch events; classify the touch events as a class in a set of classifications comprising at least finger touch and moisture touch based on a touch profile indicated by the touch features; and respond to the classified touch events.

Facts

Company
Microsoft (Microsoft Technology Licensing, LLC)
Official title
TOUCH TYPE PROFILING AND CLASSIFICATION FOR A CAPACITIVE TOUCH INTERFACE
Publication number
US20260299724A1
Application number
19097533
Filed
Apr 1, 2025
Published
Oct 1, 2026
Inventors
3
Claims
20

Classified under

G06F 3/0418 Physics & computingG06F 18/241 Physics & computingG06F 3/044 Physics & computingG06F 2203/04104 Physics & computingG06F 2203/04106 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.