A calibration method for a grating light modulator includes calibrating light reflective ribbons on the modulator on a pixel-by-pixel basis. The method further includes performing a dark-state calibration and a bright-state calibration for each pixel. Once completed, the results of the dark-state calibration...http://www.google.de/patents/US8077378?utm_source=gb-gplus-sharePatent US8077378 - Calibration system and method for light modulation device