Patent ID: 7773061

Claim:
A method of compensating uniformity of an OLED display having one or more light-emitting elements, comprising the steps of: a) providing the OLED display having the one or more light-emitting elements, each light-emitting element comprising a first electrode and a second electrode and at least one light-emitting layer formed between the electrodes responsive to a current passing through the electrodes and an electronic circuit responsive to an external controller causing a current to pass through the electrodes and the light-emitting layer to emit light; b) measuring the performance of the one or more light-emitting elements at three or more different code values; c) forming at least two different groups of code values from the three or more code values, calculating a linear transformation converting an input signal to a compensated signal from the performance measurements for each of the groups; d) calculating the difference between the measured performance and compensated signal over the range of code values for each of the groups; e) selecting the linear transformation having a preferred difference; and f) receiving an input signal and employing the selected linear transformation to calculate a compensated signal to drive the OLED display.