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US 11,635,851 B2Granted
Sensor filter for calibrating a touch system
AssigneeTactual Labs Co.
InventorsDouglas Ainsworth Scott, Daniel John Morelli
Life of this patent
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Abstract
Calibration signals are transmitted across a touch panel in order to establish a baseline heat map. The touch panel may have a variety of differently transmitted frequencies and or patterns of signals that are able to help establish a baseline heat map upon which future touch events can be compared in order to improve characteristics of the receipt of the touch events by, for example, improving the ability to determine coupling.
Claims17
A method for calibrating a sensor comprising:
- transmitting a first plurality of signals on a plurality of transmitting conductors adapted to transmit signals, wherein the first plurality of signals are transmitted during a first frame, wherein the first plurality of signals comprises a plurality of different frequencies transmitted during the first frame and wherein the first frame is a no-touch circumstance, wherein the first plurality of signals transmitted during the first frame are a white noise subset;
- receiving a first receive frame on a plurality of receiving conductors adapted to receive signals, wherein the first receive frame is a non-video frame;
- measuring the first receive frame to determine the spectral components therein;
- transmitting a second plurality of signals on the plurality of transmitting conductors, wherein the second plurality of signals are transmitted during a second frame, wherein the second plurality of signals comprises a plurality of different frequencies during the second frame and wherein the second frame is a no-touch circumstance;
- receiving a second receive frame on the plurality of receiving conductors, wherein the second receive frame is a non-video frame;
- measuring the second receive frame to determine the spectral components therein;
- generating a baseline heat map based only on the measured spectral components of transmitted signals, wherein at least the measured spectral components in the first frame and the measured spectral components in the second frame form the baseline heat map, wherein the baseline heat map provides a calibration reference for the touch panel, wherein all frames used to form the baseline heat map are no touch frames.
4 more elements
A method for calibrating a sensor comprising:
- transmitting a plurality of signals on a plurality of transmitting conductors adapted to transmit a plurality of signals, wherein the plurality of signals transmitted during the are a white noise subset, during each of a plurality of frames;
- receiving a plurality of receive frames on a plurality of receiving conductors adapted to receive signals, wherein each of the plurality of receive frames is a non-video frame;
- measuring at least some of the plurality of receive frames to determine the spectral components therein,
- generating a baseline heat map based only on the measured spectral components of the transmitted plurality of signals, wherein the baseline heat map provides a calibration reference for the touch panel;
- and,
- wherein each of the plurality of receive frames is a no-touch circumstance and wherein all frames used to form the baseline heat map are no-touch circumstance frames.
3 more elements
Dependencies are inferred from the claim text.