Uniformity correction method for low cost and non-rectangular touch sensor matrices
First Claim
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1. A method of modifying touch sense values corresponding to unit cells of a touch array, the method comprising:
- storing a set of touch sense values corresponding to a measured characteristic of at least one unit cell of a plurality of unit cells of the touch array;
accessing a correction matrix that defines an active region and an inactive region of the touch array, the inactive region surrounded by the active region; and
modifying touch sense values of a first subset of the plurality of unit cells that are partially within the active region defined by correction values of the correction matrix.
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Abstract
A method includes storing a set of touch sense values corresponding to a measured characteristic of at least one unit cell of a plurality of unit cells of the touch array and accessing a correction matrix that defines an active region and an inactive region of the touch array. The inactive region is surrounded by the active region. The method further includes modifying touch sense values of a first subset of the plurality of unit cells that are partially within the active region defined by correction values of the correction matrix.
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Citations
20 Claims
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1. A method of modifying touch sense values corresponding to unit cells of a touch array, the method comprising:
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storing a set of touch sense values corresponding to a measured characteristic of at least one unit cell of a plurality of unit cells of the touch array; accessing a correction matrix that defines an active region and an inactive region of the touch array, the inactive region surrounded by the active region; and modifying touch sense values of a first subset of the plurality of unit cells that are partially within the active region defined by correction values of the correction matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of detecting a proximity of an object to a touch panel, the method comprising:
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using a memory device to store a correction matrix that defines an active portion of a touch array and an inactive portion of the touch array, wherein the active portion surrounds the inactive portion; storing a touch sense value associated with a unit cell of the touch array; accessing the memory to determine a correction value in the correction matrix that corresponds to the unit cell; and based on the unit cell being located partially in the active portion and partially in the inactive portion, modifying the sense value for the unit cell using the determined correction value; and detecting the proximity of the object to the touch panel, using the modified sense value. - View Dependent Claims (13, 14, 15, 16)
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17. A system comprising:
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a touch array comprising a first region that surrounds a second region of the touch array; and a touch controller coupled to the touch array, the touch controller comprising a memory to store a plurality of correction values, each correction value corresponding to a discrete sensor location, of a plurality of discrete sensor locations, of the touch array; and a processing element coupled to the memory and configured to access a sense value corresponding to a first discrete sensor location, of the plurality of discrete sensor locations, wherein the first discrete sensor location is partially in the first region and partially in the second region, determine a first correction value of the plurality of correction values that corresponds to the first discrete sensor location, and modify the sense value using the first correction value to account for an inactive status of the second region. - View Dependent Claims (18, 19, 20)
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Specification