Esd detection on a touch input device
AssigneeApple Inc.
InventorsDavid H. C. SHIH, Albert LIN, Sean E. O'CONNOR, Ari Y. BENBASAT, Wayne Carl WESTERMAN
Life of this patent
Estimating the term…
Abstract
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.
Claims14
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.
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 is lower than a predetermined threshold, wherein touch events have touch values higher than the predetermined threshold.
A touch sensitive device capable of detecting the occurrence of an ESD event, the device comprising:
- a touch sensor panel capable of applying stimulation signals to a plurality of drive lines of the touch sensor panel,
- a processor capable of
- 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;
- and
- 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.
A touch sensitive device capable of detecting the occurrence of an ESD event, the device comprising:
- a touch sensor panel capable of applying stimulation signals to a plurality of drive lines of the touch sensor panel,
- a processor capable of
- 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;
- and
- differentiating the ESD event from the touch events by determining if a magnitude of the EDS values is lower than a predetermined threshold, wherein touch events have touch values higher than the predetermined threshold.
A method for detecting an occurrence of an ESD event on a touch input device, the method comprising:
- configuring a specific feature of the touch input device that correspond to selected drive lines among a plurality of drive lines on the touch input device;
- applying stimulation signals to the 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;
- and
- differentiating the ESD event from the touch events by determining if the sensed values occur only on the selected drive lines.
A touch sensitive device capable of detecting the occurrence of an ESD event, the device comprising:
- a touch sensor panel capable of applying stimulation signals to a plurality of drive lines of the touch sensor panel,
- a processor capable of
- 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;
- and
- differentiating the ESD event from the touch events by determining if the sensed values occur only on the selected drive lines.
Dependencies are inferred from the claim text.