System and method of communication between a capacitive touch screen and an active stylus
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United States of America Patent
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Dec 19, 2017
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N/A
app pub date -
Jun 7, 2017
filing date -
Aug 18, 2014
priority date (Note) -
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Abstract
An active stylus is capacitively coupled to a capacitive touch panel for communication. The active stylus operates in a wait mode to receive initial communications from the panel. In response to such receipt, the active stylus synchronizes to a repeating communications frame implementing time division multiplexing. Communications from the active stylus to the panel include: information communications; synchronization communications and communications specific for columns and/or rows of the panel. Communications from the panel to the active stylus may be addressed uniquely to the stylus or commonly to a group of styluses.
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