5‐1: Student Paper: Implementation of Full‐Panel Circuit Models for Interference Estimation Between Touch and Display Operation in On‐Cell Touch AMOLED

Abstract

A full‐panel circuit model of the on‐cell touch AMOLED is introduced to simulate the mutual interference between touch and display operations. The proposed panel model successfully reproduced nonlinear behaviors of the display noise observed in real systems. Also, the reverse‐directional interference, i.e., touch‐to‐display coupling, was simulated, showing that touch stimulation incurs the fluctuation of display charging voltages, possibly causing perceivable line defects. The proposed panel model can be used for various touch/display algorithms to reduce the interference effects and to determine key design parameters for new panels.

31‐2: An Asynchronous Single‐Ended Touch Sensing Method for Y‐OCTA Using Adaptive TX Duty Control method

“…2. [2] The biggest reason of the difficulty to compensate the Display Noise in Y-OCTA is that Parasitic Capacity between the Display ELVSS and the Touch sensing panel are dozens of times bigger than the feedback-capacitance of Charge Amp of Touch RX stage. In this case, even small noise can easily cause saturation in charge-amp.…”