Pixelated mutual capacitance sensing for water detection

A method for detecting an object, comprising:

• at a touch sensing device including a touch sensor panel and one or more processors:
• arranging an array of configurable first pixels and second pixels in the touch sensor panel in an alternating checkerboard arrangement, wherein the first pixels include a first plurality of sub-pixels, the second pixels include a second plurality of sub-pixels, and the first plurality of sub-pixels and the second plurality of sub-pixels are configurable into a first pixelated mutual capacitance configuration and into a second pixelated mutual capacitance configuration;
• in accordance with the first pixelated mutual capacitance configuration,
• receiving a stimulation signal for mutual capacitance sensing at a plurality of first drive pixels that comprise the first pixels,
• configuring the second pixels as a plurality of first sense pixels, each first sense pixel including a first sense region and a first ground region,
• separating the plurality of first drive pixels from the first sense region of each first sense pixel using the first ground region of each first sense pixel, and capacitively coupling the first sense region with one or more of the first drive pixels, and
• detecting changes in mutual capacitance between one or more of the first drive pixels and the first sense region of each first sense pixel using at least one sense circuit communicatively coupled to the first sense regions,
• wherein the first plurality of sub-pixels are configured as a plurality of first drive sub-pixels to receive the stimulation signal,
• wherein each first sense region of the plurality of first sense pixels includes a first portion of the second plurality of sub-pixels configured as one or more first sense sub-pixels,
• wherein each first ground region of the plurality of first sense pixels includes a second portion of the second plurality of sub-pixels configured as a plurality of first ground sub-pixels, and
• wherein the method further comprises:
• receiving the stimulation signal at the plurality of first drive sub-pixels,
• capacitively coupling each first sense sub-pixel with one or more of the first drive pixels;
• and
• forming each first ground region of the plurality of first sense pixels with a plurality of first ground sub-pixels;
• and
• in accordance with the second pixelated mutual capacitance configuration,
• receiving a stimulation signal for mutual capacitance sensing at a plurality of second drive pixels that comprise the second pixels,
• configuring the first pixels as a plurality of second sense pixels, each second sense pixel including a second sense region and a second ground region,
• separating the plurality of second drive pixels from the second sense region of each second sense pixel using the second ground region of each second sense pixel, and capacitively coupling the second sense region with one or more of the second drive pixels, and
• detecting changes in mutual capacitance between one or more of the second drive pixels and the second sense region of each second sense pixel using at least one sense circuit communicatively coupled to the second sense regions,
• wherein the second plurality of sub-pixels are configured as a plurality of second drive sub-pixels to receive the stimulation signal,
• wherein each second sense region of the plurality of second sense pixels includes a first portion of the first plurality of sub-pixels configured as one or more second sense sub-pixels,
• wherein each second ground region of the plurality of second sense pixels includes a second portion of the first plurality of sub-pixels configured as a plurality of second ground sub-pixels, and
• wherein the method further comprises:
• receiving the stimulation signal at the plurality of second drive sub-pixels,
• capacitively coupling each second sense sub-pixel with one or more of the second drive pixels;
• and
• forming each second ground region of the plurality of second sense pixels with a plurality of second ground sub-pixels;
• wherein a position of ground sub-pixels is different between the first pixelated mutual capacitance configuration and the second pixelated mutual capacitance configuration.