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US 12,347,398 B2Granted
Enhanced push-pull (EPP) waveforms for achieving primary color sets in multi-color electrophoretic displays
AssigneeE Ink Corporation
InventorAmit Deliwala
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Abstract
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.
Claims15
A computer program product stored in a non-transitory memory for determining push-pull waveforms for driving an electrophoretic display, the computer program product containing a plurality of instructions which, when executed by a processor, cause the processor to:
- estimate an optical state of the electrophoretic display produced by each of a plurality of candidate push-pull waveforms using a model representing the electrophoretic display, wherein the model includes a transfer function represented by
- O(t)=ƒ(V(t),x(0))
- where t is time, O(t) is the optical state of the electrophoretic display as a function of t, V(t) is the voltage applied to the electrophoretic display as a function of t, x(0) is an initial optical state of the electrophoretic display at t=0, and f is a function of V(t) and x(0);
- and
- select a push-pull waveform to produce a targeted optical state based on the estimated optical states produced by the candidate waveforms.
2 more elements
Dependencies are inferred from the claim text.