US 12,451,049 B2
Methods for driving electro-optic displays
Kenneth R. Crounse, Somerville, MA (US); Amit Deliwala, Andover, MA (US); Stephen J. Telfer, Arlington, MA (US); Jonathan L. Zalesky, Newton, MA (US); Yin Al, San Francisco, CA (US); and Teck Ping Sim, Acton, MA (US)
Assigned to E Ink Corporation, Billerica, MA (US)
Filed by E INK CORPORATION, Billerica, MA (US)
Filed on Mar. 23, 2024, as Appl. No. 18/614,645.
Claims priority of provisional application 63/492,217, filed on Mar. 24, 2023.
Prior Publication US 2024/0321177 A1, Sep. 26, 2024
Int. Cl. G09G 3/296 (2013.01)
CPC G09G 3/296 (2013.01) [G09G 2320/0247 (2013.01); G09G 2340/16 (2013.01); G09G 2354/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for driving an electro-optic display having a plurality of display pixels, the method comprising:
determining a level of stress quantity for a display pixel of the electro-optic display based on at least one prior update to the optical state of the display pixel;
receiving a request to update the optical state of the display pixel;
applying driving waveforms from a first update scheme to the display pixel when:
(i) driving waveforms from the first update scheme were used for an immediately prior update of the display pixel, and the level of stress quantity is not greater than a first level of stress threshold; or
(ii) driving waveforms from a second update scheme were used for the immediately prior update of the display pixel, and the level of stress quantity is less than a second level of stress threshold; and
applying driving waveforms from the second update scheme to the display pixel when:
(i) driving waveforms from the first update scheme were used for the immediately prior update of the display pixel, and the level of stress quantity is greater than the first level of stress threshold; or
(ii) driving waveforms from the second update scheme were used for the immediately prior update of the display pixel, and the level of stress quantity is not less than the second level of stress threshold,
wherein the second update scheme comprises driving waveforms that are longer in duration than the driving waveforms of the first update scheme.