A method for the correction of brightness and uniformity variations in OLED displays,
comprising: a) providing an OLED display having a plurality of light-emitting elements
with a common power signal and local control signals; b) providing a digital input
signal for displaying information on each light-emitting element, the signal having
a first bit depth; c) transforming the digital input signal into a transformed
digital signal having a second bit depth greater than the first bit depth; and
d) correcting the transformed signal for one or more light-emitting elements of
the display by applying a local correction factor to produce a corrected digital
signal. In accordance with various embodiments, the present invention may provide
the advantages of improved uniformity in a display that reduces the complexity
of calculations, maintains a consistent bit-depth for all light-emitting elements,
provides a pre-determined output brightness, improves the yields of the manufacturing
process, and reduces the electronic circuitry needed to implement the uniformity
calculations and transformations.