ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,399,393, issued on Aug. 26, was assigned to E Ink Corp. (Billerica, Mass.).
"Electrophoretic device having a transparent light state" was invented by Donal O'Keeffe (Parteen, Ireland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A metastable light attenuator includes an electrophoretic cell having spaced-apart first and second electrodes, and electrophoretic ink therebetween including charged particles. A programmable controller applies signals to the electrodes generating an intermittent electric field across the ink to drive particles to one of a first extreme light state in which particles are maximally spread within the cell in the path of light th...