Touch sensor panel with multi-power domain chip configuration
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United States of America Patent
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Nov 6, 2018
Grant Date -
Feb 1, 2018
app pub date -
Jul 28, 2017
filing date -
Jul 29, 2016
priority date (Note) -
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Abstract
A touch sensing system is disclosed. The touch sensing system includes a guard signal generation chip operating in a first power domain referenced to a first voltage, the guard signal generation chip configured to generate a guard signal. A touch sensing chip operates in a second power domain, different from the first power domain, referenced to the guard signal, the touch sensing chip configured to sense touch at one or more touch electrodes included in a touch sensor panel operating in the second power domain referenced to the guard signal, and the touch sensing chip a different chip than the guard signal generation chip. A voltage regulator is configured to selectively regulate a voltage of the guard signal at the touch sensing chip.
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