Display with dual-function capacitive elements

摘要

A touch screen including display pixels with capacitive elements is provided. The touch screen includes first common voltage lines connecting capacitive elements in adjacent display pixels, and a second common voltage line connecting first common voltage lines. Groups of pixels can be formed as electrically separated regions by including breaks in the common voltage lines. The regions can include a drive region that is stimulated by stimulation signals, a sense region that receives sense signals corresponding to the stimulation signals. A grounded region can also be included, for example, between a sense region and a drive region. A shield layer can be formed of a substantially high resistance material and disposed to shield a sense region. A black mask line and conductive line under the black mask line can be included, for example, to provide low-resistance paths between a region of pixels and touch circuitry outside the touch screen borders.

主权项

1. A touch screen including a display region having display pixels and a non-display border region, the touch screen comprising:
a plurality of first common voltage lines disposed in rows including at least one row having a plurality of first portions that are electrically separate in the at least one row in the display region; a plurality of second common voltage lines disposed in columns including at least one column having a plurality of second portions that are electrically separate in the at least one column in the display region; a plurality of first regions and a plurality of second regions, each region including a plurality of display pixels each having a capacitive element, wherein in the plurality of first regions, the capacitive elements are electrically connected together via one or more of each of the plurality of first and second portions of the first and second common voltage lines, and wherein in the plurality of second regions, the capacitive elements are electrically connected together by a plurality of third common voltage lines disposed in columns; the plurality of first regions electrically separated from the plurality of second regions in the display region in a touch sensing mode of operation; and wherein capacitive elements within each region are configured to provide a display function in a display mode of operation of the touch screen and to provide capacitive coupling between at least one region of the plurality of first regions serving as a drive region, and one region of the plurality of second regions serving as a sense region, in the touch sensing mode of operation.