Negative pixel compensation
First Claim
Patent Images
1. 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.
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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.
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Citations
10 Claims
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1. A method comprising:
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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. - View Dependent Claims (2, 3, 4, 5)
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6. A touch sensor panel comprising:
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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. - View Dependent Claims (7, 8, 9, 10)
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Specification