Stylus tilt tracking with a digitizer
First Claim
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1. A method comprising:
- detecting a signal emitted by a stylus at a plurality of coordinates on a digitizer sensing surface;
determining coordinates of a writing tip of the stylus;
defining at least one feature characterizing an asymmetrical spread of the stylus signal on the digitizer sensing surface with respect to the writing tip coordinates;
defining asymmetry in a peak formed by amplitudes of the signal detected at the plurality of coordinates; and
detecting an orientation of the stylus with respect to a digitizer sensing surface based on the characterization of the asymmetry in the peak.
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Abstract
A method for detecting orientation of a stylus with respect to a digitizer sensing surface includes detecting a signal emitted by a stylus at a plurality of coordinates on a digitizer sensing surface, determining coordinate of a writing tip of the stylus, defining at least one feature characterizing an asymmetrical spread of the stylus signal on the digitizer sensing surface with respect to the writing tip coordinate, and characterizing an orientation of the stylus responsive to the characterization of the asymmetrical spread.
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Citations
18 Claims
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1. A method comprising:
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detecting a signal emitted by a stylus at a plurality of coordinates on a digitizer sensing surface; determining coordinates of a writing tip of the stylus; defining at least one feature characterizing an asymmetrical spread of the stylus signal on the digitizer sensing surface with respect to the writing tip coordinates; defining asymmetry in a peak formed by amplitudes of the signal detected at the plurality of coordinates; and detecting an orientation of the stylus with respect to a digitizer sensing surface based on the characterization of the asymmetry in the peak. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method comprising:
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tracking first orientation of a digitizer sensing surface in three dimensions with respect to gravity; tracking second orientation of a stylus interacting with the digitizer sensing surface in three dimensions with respect to gravity, wherein the first orientation of the digitizer sensing surface is tracked concurrently with tracking of the second orientation of the stylus; comparing the first orientation of the digitizer sensing surface with the second orientation of the stylus; and detecting a third orientation of the stylus with respect to the digitizer sensing surface responsive to the comparing. - View Dependent Claims (15, 16, 17, 18)
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Specification