Arranging and processing color sub-pixels

1. A method for preparing a color image for display on an electro-optic display device, comprising:

(a) receiving the color image defined by data pixels in a first pixel resolution, the first pixel resolution corresponding with each data pixel having a 5-bit red component, a 6-bit green component, and a 5-bit blue component;

(b) performing a color correcting operation on the color image in the first pixel resolution;

(c) performing an image sharpening operation on the color image in the first pixel resolution;

(d) performing a color linearization operation on the color image in the first pixel resolution;

(e) performing an image dithering operation on the color image in the first pixel resolution, the image dithering operation outputting the color image in a second pixel resolution, the second pixel resolution corresponding with each data pixel having a 4-bit red component, a 4-bit green component, and a 4-bit blue component; and

(f) performing a saturation adjustment operation on the color image in one of the first and second pixel resolutions;

wherein the display device includes a display matrix of display pixels, each display pixel comprising:

two or more first sub-pixels, each first sub-pixel having two or more display states and a color filter; and

a second sub-pixel, each second sub-pixel having two or more display states and a white filter, wherein

the first sub-pixels are arranged in rows and columns in a repeating pattern, and

each first sub-pixel is horizontally adjacent and vertically adjacent to one or more second sub-pixels.

2. The method of claim 1 , wherein the operations (b), (c), (d), (e), and (f) are performed in the order: (b), (c), (d), (e), (f).

3. The method of claim 1 , wherein the operations (b), (c), (d), (e), and (f) are performed in the order: (b), (c), (e), (f), (d).

4. The method of claim 1 , wherein one or more of the operations (b), (c), (d), (e), and (f) is not performed.

5. A display controller, comprising:

a data switch having an input to receive a color image defined by data pixels in a first pixel resolution, the first pixel resolution corresponding with each data pixel having a 5-bit red component, a 6-bit green component, and a 5-bit blue component;

a color correction module to perform a color correcting operation on the color image in the first pixel resolution;

an image filtering module to perform an image sharpening operation on the color image in the first pixel resolution;

a color linearization module to perform a color linearization operation on the color image in the first pixel resolution;

an image dithering module to perform an image dithering operation on the color image in the first pixel resolution, the image dithering operation outputting the color image in a second pixel resolution, the second pixel resolution corresponding with each data pixel having a 4-bit red component, a 4-bit green component, and a 4-bit blue component; and

a saturation adjustment module to perform a saturation adjustment operation on the color image in one of the first and second pixel resolutions.

6. The display controller of claim 5 , further comprising a display engine to output waveforms to an electro-optic display device, the display device having a display matrix of display pixels, each display pixel comprising:

two or more first sub-pixels, each first sub-pixel having two or more display states and a color filter; and

a second sub-pixel, each second sub-pixel having two or more display states and a white filter, wherein

the first sub-pixels are arranged in rows and columns in a repeating pattern, and

each first sub-pixel is horizontally adjacent and vertically adjacent to one or more second sub-pixels.

7. The display controller of claim 5 , wherein the display device is an electrophoretic display device.