Display with dual-function capacitive elements

A touch screen including a display portion having display pixels with capacitive elements and a non-display border portion, the touch screen comprising:

• at least one drive region of display pixels that is stimulated by stimulation signals;
• at least one sense region of display pixels that receives sense signals corresponding to the stimulation signals;
• and
• at least one grounded region of display pixels that is grounded, wherein the at least one ground region is disposed between the at least one sense region and the at least one drive region, and wherein (i) capacitive elements of each region are connected together in the display portion by a grid of common voltage lines and (ii) the at least one drive region is separated in the display portion from the at least one sense region by breaks in the grid;
• wherein capacitive elements within the at least one drive region and the at least one sense region are configured to provide a display function in a display mode of operating of the touch screen and to provide capacitive coupling between the at least one drive region and the at least one sense region in a touch sensing mode of operation of the touch screen.

A touch sensing system comprising:

• a plurality of gate lines;
• a plurality of data lines;
• the plurality of gate lines and the plurality of data lines coupled to the plurality of pixels for enabling display of data by the plurality of pixels during a display mode of operation;
• first conductive lines in a first direction, each of the first conductive lines including a plurality of first line portions extending through plural display pixels and separated from each other in the first direction by disconnections;
• and
• second conductive lines in a second direction transverse to the first direction, each of the second conductive lines including a plurality of second line portions extending through plural display pixels and separated from each other in the second direction by disconnections,
• a first region of display pixels serving as a drive region, wherein circuit elements of the display pixels in the first region are electrically connected together in the first direction by a first plurality of the first line portions, and the circuit elements of the display pixels in the first region are electrically connected together in the second direction by a first plurality of the second line portions;
• a second region of display pixels serving as a sense region and being disposed on one side of the first region along the first direction, wherein the circuit elements of the display pixels of the second region are electrically connected together in the first and second directions by a second plurality of the first line portions and a second plurality of the second line portions, respectively;
• wherein the circuit elements of the display pixels of the second region are disconnected in the display portion during a touch sensing mode of operation from the circuit elements in the first region;
• a third region of display pixels serving as another sense region and being disposed on the other side of the first region along the first direction, wherein the circuit elements of the display pixels of the third region are electrically connected together in the first and second directions by a third plurality of the first line portions and a third plurality of the second line portions;
• wherein the circuit elements of the display pixels of the third region are disconnected in the display portion during the touch sensing mode of operation from the circuit elements in the first region;
• and
• at least one sense channel connected to the second and third regions;
• wherein the circuit elements of the display pixels of the first, second and third regions are configured to provide a display function in the display mode of operating of the touch sensing system and to provide capacitive coupling between the first region and the second region and between the first region and the third regions in the touch sensing mode of operation of the touch sensing system.

A touch screen comprising:

• a plurality of gate lines;
• a plurality of data lines;
• a plurality of pixels, each pixel having an pixel electrode and a common electrode;
• for each pixel, a capacitor formed by the pixel electrode and the common electrode;
• the plurality of gate and data lines coupled to the plurality of pixels for enabling display of data by the plurality of pixels during a display mode of operation;
• a first plurality of common voltage lines connecting together the common electrodes of each pixel in a first region along a first and a second direction, the first region serving as a drive region;
• a second plurality of common voltage lines, connecting together the common electrodes of each pixel in a second region along the first and the second directions, the second region serving as a sense region;
• the first plurality of common voltage lines receiving a stimulating voltage during a touch sensing mode of operation;
• and
• the second plurality of common voltage lines coupled to capacitive measuring circuitry during the touch sensing mode of operation.