ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,493,107, issued on Dec. 9, was assigned to Apple Inc. (Cupertino, Calif.).

"Optical sensor having opaque sidewall coating" was invented by Yifei Wang (Sunnyvale, Calif.), Chih-Wei Chuang (Albany, Calif.), Xiaoyang Zhang (Singapore) and Zhenbin Ge (San Jose, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An electronic device may include a proximity sensor for detecting whether an external object is in the vicinity of the device. The proximity sensor may be implemented as an optical sensor module having a substrate, a light emitter die mounted on the substrate, a light detector die mounted on the substrate, and a package enclosure housing the light ...