Touch sensitive display for a portable device

A touch sensitive display comprising:

• an active matrix display element having a viewer proximal side and a viewer distal side and comprising a pixel array with rows and columns of pixels;
• and
• a touch sensitive element disposed on the viewer distal side of the active matrix display element, wherein the touch sensitive element comprises:
• a first conductive layer comprising a first plurality of conductors;
• a second conductive layer comprising a second plurality of conductors;
• and
• a pressure sensitive layer sandwiched between the first conductive layer and the second conductive layer and operable to modify an electrical conductivity between a first conductor of the first plurality of conductors and a second conductor of the second plurality of conductors in response to a pressure point resulting from an applied pressure, characterized in that:
• the first plurality of conductors are row conductors of the touch sensitive element and the second plurality of conductors are column conductors of the touch sensitive element,
• each row of pixels shares a respective row buffer amplifier with a touch sensitive element row conductor, and
• each column of pixels shares a respective column buffer amplifier with a touch sensitive element column conductor;
• and
• wherein the respective row buffer amplifier and column buffer amplifier synchronously operate under a time-division multiplexed control to carry out mutually exclusive functions of touch sensing and pixel value setting.