ALEXANDRIA, Va., July 16 -- United States Patent no. 12,361,743, issued on July 15, was assigned to PIXART IMAGING INC. (Hsin-Chu County, Taiwan).

"Finger detection device and operating method thereof" was invented by Yu-Ju Lee (Hsin-Chu County, Taiwan) and Tzung-Min Su (Hsin-Chu County, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a finger detection device including a light source, a light sensor and a processor. The light sensor respectively captures a first image frame and a second image frame corresponding to turning on and turning off the light source. The processor calculates a differential image frame of the first image frame and the second image frame, determines a covered ...