ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,462,767, issued on Nov. 4, was assigned to E Ink Corp. (Billerica, Mass.).
"Method for driving electrophoretic display device" was invented by Craig Lin (Fremont, Calif.) and Xiaolong Zheng (Fremont, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electrophoretic medium comprises a fluid and first (B), second (Y), third (R) and fourth (W) particles dispersed in the fluid and having differing colors. The first (B) and third (R) particles bear charges of one polarity and the second (Y) and fourth (W) particles bear charges of the opposite polarity, The first particles (B) have a greater zeta potential than the third particles (R), and the second p...