AN OLED DISPLAY WITH AGING COMPENSATION

摘要

Compensating image signals for driving an OLED display having a plurality of light-emitting elements having outputs that change with time or use, comprising: a) obtaining a measured or estimated first value of the current used by individual elements in response to known image signals; b) specifying multiple groups of elements, wherein at least one of the specified groups contains at least one element common to another specified group; c) measuring total currents used by each of the specified groups in response to known image signals; d) forming an estimated second value of the current used by individual elements based on the measured total currents, e) calculating correction values for individual elements based on the difference between the first and second current values, and f) employing the correction values to compensate image signals for the changes in the output of the elements and produce compensated image signals.