Patent ID: 6271820
Filing Date: 2001-08-07
Classification: G09G

Abstract:
A light modulating device comprising a plurality of data electrodes, a plurality of strobe electrodes, modulating elements at the intersections of the strobe and data electrodes, and addressing means for supplying data signals to the data electrodes in successive data selection periods and for supplying strobe signals to the strobe electrodes to set the transmission levels of the elements in dependence on the data signals supplied to the elements during each data selection period, wherein each element comprises a pair of subelements, and the addressing means is arranged to address the subelements of the pair by 1:3 spatial dither and to supply different strobe signals to each of the subelements during different bits of 1:1 spatial or temporal dither within the same data selection period, whereby the transmission level of each subelement is determined by the data signal applied to the subelement in the data selection period in association with the strobe signal applied to the corresponding spatial or temporal dither bit.