Negative pixel compensation
AssigneeApple Inc.
InventorsWayne Carl WESTERMAN, Sean Erik O'CONNOR
Life of this patent
Estimating the term…
Abstract
Negative pixel compensation in a touch sensor panel is disclosed. The panel can compensate for a negative pixel effect in touch signal outputs due to poor grounding of an object touching the panel. To do so, the panel can reconstruct a captured touch image to remove negative pixel values indicative of the negative pixel effect and compute a composite image from the captured image and the reconstructed image to replace the captured image. In addition or alternatively, the panel can reconstruct a captured touch image to remove negative pixel values indicative of the negative pixel effect and replace the captured image with the reconstructed image.
Claims10
A method comprising:
- computing at least one parameter indicative of a grounding condition of a user of a touch sensor panel;
- comparing the computed parameter to a threshold to determine whether a negative pixel effect applies to the touch sensor panel;
- and
- based on the comparison, compensating a touch image of the touch sensor panel for the negative pixel effect by replacing the touch image with a reconstructed touch image having the negative pixel effect substantially reduced.
A touch sensor panel comprising:
- multiple pixels configured to generate a touch image;
- and
- a processor in communication with the pixels and configured to
- determine whether the touch image indicates a negative pixel effect, and
- based on the determination, compensate the touch image for the negative pixel effect by replacing the touch image with a reconstructed touch image in which the negative pixel effect is reduced.
Dependencies are inferred from the claim text.