A METHOD AND APPARATUS FOR CALIBRATING DISPLAY DEVICES AND AUTOMATICALLY COMPENSATING FOR LOSS IN THEIR EFFICIENCY OVER TIME

摘要

An organic LED display is vulnerable sikineunde developing life of the emitted light along the non-uniformity across the display matrix; Thus, fast, in the display device in an initial inspection, it is necessary to accurately correct the non-uniformity. Of the emitted light is reduced, because following a power law, the variation of the optical output is to accumulate a driving current for the individual pixels during the elapsed time can be predicted (i.e., perform a number accumulation); Then, on the basis of the predicted change the drive current can be controlled for each pixel to compensate for the decrease. Other possibilities to compensate for non-uniformity is possible by placing a light detector such as a camera, the camera is in the same group or different single pixel increases as the appropriate displacement of the photodetector along its size is gradually X, Y, Z the light emitted by the measurement, and corrects the non-uniformity at every stage.