High-accuracy touch positioning for touch panels
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United States of America Patent
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Jun 16, 2015
Grant Date -
Jul 11, 2013
app pub date -
Mar 12, 2012
filing date -
Jan 9, 2012
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Control circuitry for a touch panel includes a touch panel interface, a memory comprising touch positioning logic, and a controller in communication with the memory and the touch panel interface. The controller is operable, when the touch positioning logic is executed, to perform selected processing of the touch panel, including scanning a touch panel and determining a touch panel blob resulting from a touch, obtaining blob characteristics of the touch panel blob, and determining a position of the blob relative to the touch panel based on the blob characteristics. The blob characteristics can be adjusted to more accurately position the blob in circumstances where the blob is located near the edge of the touch panel, is in close proximity to another blob, or when the touch panel has variation in the received signal noise.
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