Patent ID: 8804056

Claim:
A method of operating an touch screen including a plurality of circuit elements, dedicated sense lines disposed between a pixel material and a color filter layer, and drive lines disposed on a TFT substrate, the method comprising: operating a first portion of a group of the circuit elements as display circuitry by applying preset voltages to common electrodes of the first portion of the group of circuit elements disposed on the TFT substrate in a first display operation that displays an image on the touch screen during a first time period; and operating a second portion of the group of the circuit elements distinct from and non-overlapping with the first portion of the group of circuit elements, as touch sensing circuitry in a first touch sensing operation by applying stimulation signals along the drive lines to common electrodes of the second portion of the group of circuit elements disposed on the TFT substrate during the first time period; and transmitting sense signals along the dedicated sense lines disposed between the pixel material and the color filter layer to sense channels of the touch sensing circuitry during the first time period; wherein operating the first group in the first display operation occurs concurrently with operating the second group in the first touch sensing operation.