ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,536,886, issued on Jan. 27, was assigned to Amazon Technologies Inc. (Seattle).

"Techniques for optimizing motion detection using PIR detectors" was invented by Eric S. Micko (San Jose, Calif.) and Sonny Windstrup Rasmussen (Singapore).

According to the abstract* released by the U.S. Patent & Trademark Office: "This disclosure describes techniques for optimizing motion detection in systems that use passive infrared (PIR) detectors. The techniques comprise generating a first signal and a second signal by two sets of detector elements. The techniques further involve calculating a sum of the first signal and the second signal as well as a difference between the first signal and the seco...