Modelling crosstalk through common semiconductor layers in AMOLED displays: Modelling crosstalk in AMOLED displays

High pixel density displays are demanded for active matrix organic light-emitting diode displays (AMOLED) in applications such as virtual reality headsets, micro-displays, and high-end smartphones. Parasitic emission from non-addressed neighboring pixels (crosstalk) is a common problem in such high pixel density AMOLED, and this crosstalk becomes more severe as the pixel density and fill ratio of the display increases. One of the causes of crosstalk is parasitic currents that travel through common organic semiconductor layers. In this paper, we model and quantify the pixel crosstalk using a 2+1D finite element model that is based on the conductivity of the common layer and the luminance-current-voltage curves of the subpixels as measured input parameters. We assess the effect of crosstalk on the pixel current, observed color, and luminance. The 2+1D model limits the number of degrees of freedom so that calculations on a standard personal computer are feasible.