Digitizer, stylus and method of synchronization therewith
First Claim
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1. A method for operating a digitizer with a stylus wherein the digitizer includes a grid based digitizer sensor including conductive lines arrayed along a first and second axis of the digitizer sensor, the method comprising:
- triggering at a defined time within a refresh cycle of the digitizer at least a portion of the conductive lines with a triggering signal;
detecting finger touch interaction with the digitizer during the refresh cycle in response to the triggering;
transmitting a signal by the stylus;
sensing the signal of the stylus with the digitizer sensor during the refresh cycle of the digitizer;
determining a time within the refresh cycle of the digitizer for sampling the signal transmitted by the stylus; and
detecting position of the stylus in subsequent refresh cycles responsive to sampling the signal transmitted by the stylus at the determined time within the refresh cycle.
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Abstract
A method for operating a digitizer with an autonomous asynchronous stylus includes sampling outputs from a digitizer, detecting from the outputs at least one pulsed signal transmitted from an autonomous asynchronous stylus at a defined rate, determining a location of the stylus interaction with respect to the digitizer, and tracking stylus interaction with the digitizer over subsequent pulsed signals transmitted from the stylus.
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Citations
17 Claims
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1. A method for operating a digitizer with a stylus wherein the digitizer includes a grid based digitizer sensor including conductive lines arrayed along a first and second axis of the digitizer sensor, the method comprising:
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triggering at a defined time within a refresh cycle of the digitizer at least a portion of the conductive lines with a triggering signal; detecting finger touch interaction with the digitizer during the refresh cycle in response to the triggering; transmitting a signal by the stylus; sensing the signal of the stylus with the digitizer sensor during the refresh cycle of the digitizer; determining a time within the refresh cycle of the digitizer for sampling the signal transmitted by the stylus; and detecting position of the stylus in subsequent refresh cycles responsive to sampling the signal transmitted by the stylus at the determined time within the refresh cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification