Patent ID: 6108122
Filing Date: 2000-08-22
Classification: G09G

Abstract:
A light modulating device comprising:an addressable matrix of modulating elements; andaddressing means for selectively addressing each element within a series of addressing frames in order to vary the transmission level of the element relative to the transmission levels of the other elements,the addressing means including temporal dither means for addressing each element within each frame with different combinations of temporal dither signals applied to separately addressable temporal bits within the frame to produce different overall transmission levels, wherein the temporal dither means is arranged to address a first modulating element with a first combination of temporal dither signals to produce a first transmission level and to address a second modulating element with a second combination of temporal dither signals, which differs from the first combination of temporal dither signals, to produce the same first transmission level such that, during a transition between the first transmission level and a second transmission level, a transient in one direction in the transmission level of the first modulating element is at least partially compensated for by a transient in the opposite direction in the transmission level of the second modulating element.