US Patent 11984090 Four-particle electrophoretic displays with synchronized driving waveforms
Patent 11984090 was granted and assigned to E Ink Corporation on May, 2024 by the United States Patent and Trademark Office.
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US Patent 11984090 Four-particle electrophoretic displays with synchronized driving waveforms
The present invention provides four-particle electrophoretic displays with improved driving methods to achieve better color separation between adjacent pixel electrodes. The driving methods improve the color state performance when a first pixel is displaying a mixed state of a first highly-charged particle and a second lower-charged particle of the opposite polarity, while a neighboring pixel is displaying a state of a second highly-charged particle having the opposite polarity to the first highly-charged particle. The particles can be, for example, all reflective or one type of particle can be partially light transmissive.
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