Negative Pixel Compensation
First Claim
Patent Images
1. A method comprising:
- reconstructing a touch image from a touch sensor panel; and
compensating the touch image for a negative pixel effect by computing a composite image of the touch image and the reconstructed touch image, weighting of the touch image and the reconstructed touch image in the composite image being determined based on a magnitude of the negative pixel effect.
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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
25 Claims
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1. A method comprising:
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reconstructing a touch image from a touch sensor panel; and compensating the touch image for a negative pixel effect by computing a composite image of the touch image and the reconstructed touch image, weighting of the touch image and the reconstructed touch image in the composite image being determined based on a magnitude of the negative pixel effect. - View Dependent Claims (2, 3, 4, 5, 6)
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7. 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 a negative pixel effect on the touch image, reconstruct the touch image, and compute a composite touch image by combining weighted pixel values of the touch image with weighted pixel values of the reconstructed touch image. - View Dependent Claims (8, 9, 10, 11)
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12. 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 (13, 14, 15, 16)
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17. 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 (18, 19, 20, 21)
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22. A computer readable storage medium having stored thereon a set of instructions for compensating for a negative pixel effect in a touch sensor panel, that when executed by a processor causes the processor to:
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compute at least one parameter indicative of the negative pixel effect in the touch sensor panel; and compensate pixel values of a touch image generated by the touch sensor panel for the negative pixel effect by applying the computed parameter to the pixel values. - View Dependent Claims (23, 24, 25)
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Specification