Pixel circuit for crosstalk reduction

Abstract

An active-matrix display comprising a power source V; a pixel array of columns and rows, each light-emitting pixel having an individually controlled segmented electrode and an opposite electrode; a driving circuit comprising at least one data line that supplies a data signal for each pixel along a column, wherein the data signal controls the gate of a driving transistor whose source and drain are connected between the power source Vand the segmented electrode and at least one scan line that supplies a scan signal that controls the gate of a scan transistor that enables the loading of the data signal from the data line to the gate of the driving transistor for each pixel along a row; and a pixel control circuit in electrical contact with the segmented electrode wherein the pixel control circuit prevents light emission by the pixel based on the value of the data signal for that pixel. The pixel control circuit comprises a decision circuit which outputs a signal which controls a bypass transistor which prevents emission whenever the data signal indicates that the pixel should be non-emitting. This reduces crosstalk, particularly in OLED microdisplays.