Firmware methods and devices for a mutual capacitance touch sensing device
First Claim
1. A method of determining a touch area of a user'"'"'s finger on a touch panel or touchpad in a mutual capacitance sensing device, comprising:
- (a) determining, in a processor of the sensing device, which center sense cell in the touch panel or touchpad is generating a highest touch point signal level and determining such highest touch point signal level;
(b) determining touch point signal levels corresponding to cells adjacent to the center cell;
(c) for those adjacent cells where signal levels corresponding thereto meet or exceed a predetermined percentage of the highest touch point signal level, designating such cells as touch cells together with the center cell, and(d) determining a touch area of the touch panel or touchpad on the basis of the touch cells.
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Abstract
Disclosed are various embodiments of methods and devices for operating a processor or host controller in a mutual capacitance sensing device. Methods and devices for sorting motion reports provided to a host controller or other processor in a mutual capacitance sensing device, reporting touch points to a host controller or other processor in a mutual capacitance sensing device, improving noise robustness and navigation performance in a mutual capacitance sensing device, determining a touch area of a user'"'"'s finger on a touch panel or touchpad of a mutual capacitance sensing device, and avoiding false wakeups and minimizing power consumption in a mutual capacitance sensing device having a touch panel or touchpad are described.
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Citations
5 Claims
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1. A method of determining a touch area of a user'"'"'s finger on a touch panel or touchpad in a mutual capacitance sensing device, comprising:
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(a) determining, in a processor of the sensing device, which center sense cell in the touch panel or touchpad is generating a highest touch point signal level and determining such highest touch point signal level; (b) determining touch point signal levels corresponding to cells adjacent to the center cell; (c) for those adjacent cells where signal levels corresponding thereto meet or exceed a predetermined percentage of the highest touch point signal level, designating such cells as touch cells together with the center cell, and (d) determining a touch area of the touch panel or touchpad on the basis of the touch cells. - View Dependent Claims (2, 3, 4, 5)
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Specification