E Ink Corporation

Amit Deliwala

Stephen J Telfer

Sunil Krishna Sainis

Kosta Ladavac

Christopher L Hoogeboom

Crystal Nguyen

Kenneth R Crounse

Teck Ping Sim

Jonathan L Zalesky

Yin Al

Methods for driving an electro-optic displays having a plurality of display pixels are described. The method includes 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, and receiving a request to update the optical state of the display pixel. The method also includes applying driving waveforms from first or second update schemes to the display pixel depending on the update scheme used for an immediately prior update of the display pixel and comparisons of the level of stress quantity to two level of stress thresholds.

Methods for driving electro-optic displays

Continuous waveforms for driving a four-particle electrophoretic medium including four different types of particles, for example a set of scattering particles and three sets of subtractive particles. Methods for identifying a preferred waveform for a target color state or a target transition when using a continuous or quasi-continuous voltage driver/controller.

Continuous waveform driving in multi-color electrophoretic displays

Enhanced push pull driving waveforms for driving a four particle electrophoretic medium including four different types of particles, for example a set of scattering particles and three sets of subtractive particles. Methods for identifying a preferred waveform for a target color state when using a voltage driver having at least five different voltage levels.

Enhanced push-pull (EPP) waveforms for achieving primary color sets in multi-color electrophoretic displays

A system for simplified driving of electrophoretic media using a positive and a negative voltage source, where the voltage sources have different magnitudes, and a controller that cycles the top electrode between the two voltage sources and ground while coordinating driving at least two drive electrodes opposed to the top electrode. The resulting system can achieve roughly the same color states as compared to supplying each drive electrode with six independent drive levels and ground. Thus, the system simplifies the required electronics with only marginal loss in color gamut. The system is particularly useful for addressing an electrophoretic medium including four sets of different particles, e.g., wherein three of the particles are colored and subtractive and one of the particles is light-scattering.

Coordinated top electrode—drive electrode voltages for switching optical state of electrophoretic displays using positive and negative voltages of different magnitudes

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Andover, MA, United States of America

Amit Deliwala