ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,474,772, issued on Nov. 18, was assigned to Valve Corp. (Bellevue, Wash.).
"Eye tracking" was invented by Evan Fletcher (Carnation, Wash.) and Scott Nietfeld (Bellevue, Wash.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Calibration for eye tracking calibration in a head-mounted display can refined during use by tracking head rotation of a user during a time period while the head-mounted display is worn by the user, tracking eye rotation of the user during the time period, comparing the eye rotation of the user to the head rotation of the user during the time period, and refining a calibration state of eye tracking for the head-mounted display based on...