ALEXANDRIA, Va., May 26 -- United States Patent no. 12,638,738, issued on May 26, was assigned to Apple Inc. (Cupertino, Calif.).
"Counter electrode for an electrochromic device" was invented by Erik J. Bjornard (San Jose, Calif.) and Tingjun Xu (San Jose, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An imaging system for a portable electronic device includes a variable aperture between a lens group and an image sensor. The variable aperture is defined by an electrochromic stack that defines a switching region and a central non-switching region. The electrochromic stack is defined by a layer of electrochromic material in which an electrochromic crystallite dispersion (e.g., nickel oxide) is suspende...