| abstract |
During certain frame times, by using voltage waveforms 600, 620, 640, 660; 700, 720, 740, 760; 800, 820, 840, 860 configured to suppress voltage variations into a subset of possible voltage levels. The image is updated in a bistable display 310, such as an electrophoretic display. Specific frame times may be generated during data dependent of waveforms such as reset section R and / or drivers D, D1, D2. Because of the reduced voltage swing, the supply voltage can be reduced, resulting in reduced power consumption. In addition, the frame time FT 'can be shortened during the data dependencies of the waveforms to increase the number of gray levels and the accuracy of the grayscale. At other frame times, the voltage levels can be varied over the full range of possible voltage levels while the standard frame time FT is used. |