US 11,869,451 B2
Multi-primary display mask-based dithering with low blooming sensitivity
Kenneth R. Crounse, Somerville, MA (US)
Assigned to E Ink Corporation, Billerica, MA (US)
Filed by E INK CORPORATION, Billerica, MA (US)
Filed on Nov. 4, 2022, as Appl. No. 17/981,104.
Claims priority of provisional application 63/276,048, filed on Nov. 5, 2021.
Prior Publication US 2023/0145248 A1, May 11, 2023
Int. Cl. H04N 1/60 (2006.01); G09G 3/34 (2006.01); G09G 3/20 (2006.01)
CPC G09G 3/344 (2013.01) [G09G 3/2048 (2013.01); G09G 2320/0242 (2013.01); G09G 2340/0407 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for driving a color electrophoretic display having a plurality of display pixels in an array, each display pixel being capable of displaying at least three primary colors, the method comprising:
receiving an input image;
processing the input image to define a separation cumulate at each display pixel;
defining a separation cumulate threshold array wherein each member of the separation cumulate threshold array is at least two display pixels by two display pixels in size, and includes a different separation cumulate threshold for each of the at least three primary colors; and
sending an instruction to each display pixel to display the one of the at least three primary colors corresponding to a first separation cumulate threshold that is exceeded by the separation cumulate at that display pixel.