Multi-primary display mask-based dithering with low blooming sensitivity

A color electrophoretic display comprising:

• a display including an active matrix of display pixels coupled to a color electrophoretic medium, each display pixel being capable of displaying at least three primary colors;
• device memory comprising stored image data;
• and
• a master controller coupled to the display and the device memory, and configured to provide instructions to each display pixel to display one of the at least three primary colors by executing steps:
• receiving image data for each display pixel from the device memory;
• defining a separation cumulate for each display pixel by converting the image data with a look up table;
• defining a separation cumulate threshold array, wherein each portion of the separation cumulate threshold array includes at least two display pixels and a separation cumulate threshold for each of the at least three primary colors;
• and
• sending instructions to each display pixel to display the one of the at least three primary colors for which the separation cumulate for the one of the at least three primary colors exceeds the separation cumulate threshold array for the portion of separation cumulate threshold array covering that display pixel.