Digitizer, stylus and method of synchronization therewith
First Claim
Patent Images
1. A system comprising:
- a sensor configured to receive signals on conductive lines arrayed along a first axis and a second axis; and
a controller configured to;
trigger at a defined first time within a refresh cycle of the sensor, at least a portion of the conductive lines with a trigger signal and to sample output of the sensor based on the triggering to detect finger touch interaction;
sample output of the sensor to detect a stylus signal transmitted by a stylus during the refresh cycle;
detect a second time within the refresh cycle for sampling the sensor for the stylus signal; and
sample output at the second time determined in subsequent refresh cycles to detect position of the stylus based on the stylus signal received by the sensor.
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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
22 Claims
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1. A system comprising:
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a sensor configured to receive signals on conductive lines arrayed along a first axis and a second axis; and a controller configured to; trigger at a defined first time within a refresh cycle of the sensor, at least a portion of the conductive lines with a trigger signal and to sample output of the sensor based on the triggering to detect finger touch interaction; sample output of the sensor to detect a stylus signal transmitted by a stylus during the refresh cycle; detect a second time within the refresh cycle for sampling the sensor for the stylus signal; and sample output at the second time determined in subsequent refresh cycles to detect position of the stylus based on the stylus signal received by the sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system comprising:
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a display configured to display data; a sensor configured to receive signals on conductive lines arrayed along a first axis and a second axis, wherein the sensor is integrated with the display; and a controller configured to; trigger at a defined first time within a refresh cycle of the sensor, at least a portion of the conductive lines with a trigger signal and to sample output of the sensor based on the triggering to detect finger touch interaction; sample output of the sensor at staggered periods over a plurality of refresh cycles to detect a stylus signal transmitted by a stylus during the refresh cycle; detect a second time within the refresh cycle for sampling the sensor for the stylus signal; sample output at the second time determined in subsequent refresh cycles to detect position of the stylus based on the stylus signal received by the sensor; and adjust the defined first time of the sensor based on the second time. - View Dependent Claims (16, 17)
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18. A method comprising:
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sensing signals from a sensor including conductive lines arrayed along a first and a second axis; triggering at a defined first time within a refresh cycle at least one conductive line of the sensor with a trigger signal, wherein the sensor includes a plurality of conductive lines arrayed along a first and a second axis; sampling output of the sensor based on the triggering to detect finger touch interaction; sampling output of the sensor to detect a stylus signal transmitted by a stylus during the refresh cycle; detecting a second time within the refresh cycle for sampling the sensor for the stylus signal; and sampling output at the second time determined in subsequent refresh cycles to detect position of the stylus based on the stylus signal received by the sensor. - View Dependent Claims (19, 20, 21, 22)
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Specification