ALEXANDRIA, Va., May 19 -- United States Patent no. 12,631,487, issued on May 19, was assigned to PIXART IMAGING INC. (Hsin-Chu County, Taiwan).

"Single photon avalanche diode based optical sensor and event-based vision sensor" was invented by Tso-Sheng Tsai (Hsin-Chu County, Taiwan), Kuei-Yang Tseng (Hsin-Chu County, Taiwan) and Yueh-Lin Chung (Hsin-Chu County, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided an optical sensor including an SPAD pixel array, multiple counters and a processor. The multiple counters count photon events of the SPAD pixel array to output an event-based vision sensor (EVS) frame per EVS period. The processor determines an index state of each pixel of the SP...