Negative Pixel Compensation
First Claim
1. A method comprising:
- determining at least one bound for a compensation factor based on touch image values;
estimating the compensation factor within the determined bound based on the touch image values that are negative; and
applying the estimated compensation factor to the touch image values to compensate the touch image values.
1 Assignment
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Accused Products
Abstract
Negative pixel compensation in a touch sensor panel is disclosed. A method 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 method can include determining at least one bound for a negative pixel compensation factor based on touch signal values, estimating the compensation factor within the determined bound based on the touch signal values that are negative, where the negative values indicate the presence of the negative pixel effect, and applying the estimated compensation factor to the touch signal outputs to compensate the touch signal values for the negative pixel effect.
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Citations
25 Claims
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1. A method comprising:
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determining at least one bound for a compensation factor based on touch image values; estimating the compensation factor within the determined bound based on the touch image values that are negative; and applying the estimated compensation factor to the touch image values to compensate the touch image values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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analyzing negative pixel values of a touch image to determine a compensation factor; applying the determined compensation factor to the touch image to produce a compensated image absent substantially all the negative pixel values; and selectively scaling the compensated image or the touch image to provide image display consistency. - View Dependent Claims (11, 12, 13, 14)
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15. A touch sensitive device comprising:
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a touch sensor panel comprising multiple touch locations for sensing a touch on the panel; and a processor in communication with the panel and configured to capture an image of the sensed touch, identify negative values in the captured image, determine a bound of a compensation factor based on the identified negative values for adjusting the captured image, estimate the compensation factor within the determined bound, and adjust the identified negative values to about zero using the estimated compensation factor. - View Dependent Claims (16, 17, 18)
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19. A method comprising:
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determining at least one characteristic associated with a touch sensor panel; and selectively applying negative pixel compensation to an image captured by the panel based on compatibility of the compensation with the determined characteristic. - View Dependent Claims (20, 21, 22)
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23. 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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determine a bound for a compensation factor based on values of a touch image captured by the panel; estimate the compensation factor within the determined bound based on the touch image values that are negative, indicative of the negative pixel effect; and apply the estimated compensation factor to the touch image values to compensate for the negative pixel effect. - View Dependent Claims (24, 25)
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Specification