OLED DISPLAY WITH IMPROVED ACTIVE MATRIX CIRCUITRY

摘要

An OLED display for producing a multicolor image includes a plurality of pixels including three different colored addressable gamut-pixels (2Or, 2Og, 20b) and a fourth addressable within-gamut-pixel (2Ow) , each pixel having a separately addressable organic light -emitting diode (lOr) with first and second electrodes and one or more organic light emissive layers provided between the electrodes; active matrix circuitry including a separate power transistor (140r) for at least two of the three different colored addressable gamut-pixels for regulating current between a first and second voltage source (Vl, Vc) through the organic light-emitting diode of the colored addressable gamut-pixel; and the active matrix circuitry including a power transistor for the fourth addressable within-gamut-pixel for regulating current between a third and fourth voltage source (V2 , Vc) through the organic light-emitting diode of the fourth addressable within-gamut-pixel wherein at least three of the first, second, third, and fourth voltage sources provide different voltage levels .