US 12,272,324 B2
Drive scheme for improved color gamut in color electrophoretic displays
Sarah Paydavosi, Winchester, MA (US)
Assigned to E Ink Corporation, Billerica, MA (US)
Filed by E INK CORPORATION, Billerica, MA (US)
Filed on Feb. 26, 2024, as Appl. No. 18/586,740.
Claims priority of provisional application 63/448,870, filed on Feb. 28, 2023.
Prior Publication US 2024/0290290 A1, Aug. 29, 2024
Int. Cl. G09G 3/34 (2006.01); G02F 1/1677 (2019.01); G09G 3/20 (2006.01)
CPC G09G 3/344 (2013.01) [G02F 1/1677 (2019.01); G09G 3/2092 (2013.01); G09G 2310/06 (2013.01); G09G 2310/065 (2013.01); G09G 2310/068 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/0257 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for driving an electrophoretic display including a color filter layer between a viewer and a layer of electrophoretic media, the electrophoretic media comprising black and white charged particles and being addressed by a plurality of display pixels, the method comprising:
updating the display with a first image; and
updating the display with a second image, wherein at least some of the plurality of display pixels are updated to the second image with a waveform comprising a pre-pulse, a mid-pulse, and a set-pulse, wherein the mid-pulse and a portion of the set-pulse cause the white particles to be driven adjacent the color filter layer before a desired color state of the second image is achieved by the remaining portion of the set pulse.