Patent ID: 7675490
Filing Date: 2010-03-09
Classification: G09G

Abstract:
1. A method of compensating the uniformity of an OLED device having a plurality of light-emitting elements, comprising the steps of: a) providing an OLED display having 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 first and second electrodes responsive to a current passing through the first and second electrodes, driven by an external controller that drives a current to pass through the electrodes, and the light-emitting layer to emit light, in response to input intensity values; b) measuring the performance of the one or more light-emitting elements or groups of elements at three or more different input intensity values; c) calculating parameters a and b for each of the one or more light-emitting elements or groups of elements that minimize the sum, for each of the three or more input intensity values i, of a minimization function: where y d) forming a linear transformation function ƒ(i)=mi+k, where m and k depend upon the function g, and the parameters a and b; f) receiving an input signal; g) employing the linear transformation function to compensate the input signal; and h) driving the OLED display with the compensated signal.