A method for the correction of average luminance or luminance uniformity variations in an active-matrix
OLED display, comprising:a) providing an active-matrix
OLED display;b) determining at a first time a first offset
voltage and a first
gain relationship between the
voltage and the current passing through one or more light-emitting elements;c) receiving a
signal for driving the light-emitting elements after step b), correcting the
signal by employing the first offset
voltage and
gain relationship values to compute a linear correction for the light-emitting elements to form a corrected
signal, and driving the display with the corrected signal;d) determining at a time after the first time an updated offset voltage and an updated
gain relationship between the voltage and the current passing through the light-emitting elements; ande) receiving a signal for driving the one or more light-emitting elements after step d), correcting the signal by employing the updated offset voltage and gain relationship values to compute a linear correction for the light-emitting elements to form an updated corrected signal, and driving the display with the updated corrected signal.