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US 2021/0278917 A1Published application
Multi-touch detection
AssigneeMicrosoft Technology Licensing, LLC
InventorsRafi ZACHUT, Haim PERSKI, Jonathan Moore
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Abstract
A method for multi-touch detection in a touch input device comprising a grid based sensor, the method comprises sampling outputs from a grid based sensor over a first stage of detection, selecting sensor lines based on the sampled outputs, scanning the selected sensor lines along one axis of the grid based sensor over a second stage of detection, and determining positions of user interaction based on outputs sampled in response to scanning the selected sensor lines during the second stage of detection.
Claims1
A method comprising:
- operating a sensor for capacitive based detection of user interactions, the sensor including sensor lines arranged along a first axis and along a second axis to form a grid;
- sampling first outputs of the sensor responsive to simultaneously triggering a first set of the sensor lines with a same signal over a first stage of detection;
- selecting a second set of the sensor lines that indicate a presence of the user interactions based on the first outputs sampled;
- scanning based on a multi-touch detection method only the second set over a second stage of detection to receive second outputs;
- and
- determining positions of the user interactions from the second outputs.
3 more elements
Dependencies are inferred from the claim text.