ESD DETECTION ON A TOUCH INPUT DEVICE

摘要

A touch sensitive device that detects the occurrence of an electrostatic discharge event on the device by analyzing an acquired touch image for characteristics associated with the occurrence of an ESD event is provided. An acquired touch image is analyzed for characteristics that differentiate it from a touch image generated by a user input and are correlated with an expected touch image generated by an ESD event.

主权项

1. A method for detecting an occurrence of an ESD event on a touch input device, the method comprising:
applying stimulation signals to a plurality of drive lines of a touch sensor panel; acquiring a touch image of the touch sensor panel wherein the touch image comprises a plurality of sensed values based on the stimulation signals, the sensed values including an ESD value corresponding to and ESD event and touch values corresponding to one or more touch events; differentiating the ESD event from the touch events by determining if a magnitude of the EDS values exceeds a predetermined threshold, wherein touch events have touch values lower than the predetermined threshold.