Driving system for electrophoretic displays

1. A driving method for updating a pixel in a display from a current image to a new image, wherein the display is capable of displaying n grey levels, and the method comprises the following steps:

a) providing a driving system which comprises (i) only one image memory, (ii) a lookup table map generator, (iii) a lookup table map, (iv) sub-lookup tables, (v) waveform selectors each corresponding to one of the sub-lookup tables, and (vi) a category selector;

b) storing only the new image in the image memory;

c) determining by the look-up map generator, category of a waveform required to drive the pixel from the current image to the new image by real time comparison of the current image and the new image, and storing the category of the waveform in the lookup table map;

d) selecting by the waveform selectors, driving data based on the waveform determined in step (c);

e) selecting by the category selector, one set of driving data resulted in step (d) based on the category stored in the lookup table map; and

f) sending the selected driving data, frame by frame, to the display.

2. The method of claim 1 , wherein n is 16.

3. The method of claim 1 , wherein the total number of waveforms in the sub-lookup tables is less than (n) 2 .

4. The method of claim 1 , wherein the total number of waveforms in the sub-lookup tables is less than 50% of (n) 2 .

5. The method of claim 1 , wherein some of waveforms in different sub-lookup tables are the same.

6. The method of claim 1 , wherein waveforms in different lookup tables are different.