Patent ID: 8300021

Claim:
An active matrix display, comprising: a front panel and a rear panel; wherein the front panel includes: a transparent substrate; a common electrode for cooperating with the rear panel for driving liquid crystal; a plurality of sense electrodes extending across the display, wherein the sense electrodes include first sense electrodes and second sense electrodes extending across the first sense electrodes and the first sense electrodes are x sense electrodes extending across the display in a column direction and the second sense electrodes are y sense electrodes extending across the display in a row direction; the rear panel includes: a substrate; and an array of display pixels arranged as rows and columns; a plurality of sense circuits coupled to the respective sense electrodes; and coupling capacitors capacitively coupling the sense electrodes to the respective sense circuits for coupling sense signals from the sense electrodes to the sense circuits, wherein the coupling capacitors comprise: respective coupling electrodes connected to each of the sense electrodes on the front panel, the coupling electrodes extending beyond the common electrode to a coupling region; and respective coupling electrodes connected to each of the sense circuits on the rear panel aligned with respective coupling electrodes on the front panel, and the respective coupling electrodes and the coupling region are arranged outside the array of display pixels, and for the coupling capacitors, the liquid crystal acts as a dielectric.