Patent ID: 11966509
Assignee: PIXIERAY OY
Field: Optics (Instruments)
Classification: CPC G  A | IPC G

Claim 15:
16. A method for eye tracking, the method comprising:
controlling at least one light source for emitting a light beam towards a user's eye;
employing means for changing a direction of the light beam for steering the light beam to scan a surface of the user's eye;
employing at least one light sensor for sensing reflected light signals pertaining to reflections of the light beam off the surface of the user's eye;
detecting when the light beam is incident upon a pupil of the user's eye during scanning of the surface of the user's eye, based on variations in at least one parameter of the reflected light signals sensed by the at least one light sensor during scanning;
steering the light beam to be incident upon a centre of the pupil, wherein the light beam is determined to be incident upon the centre of the pupil when a minimum value from amongst values of the at least one parameter of the reflected light signals is sensed by the at least one light sensor;
determining a specific direction of the light beam at which the light beam is incident upon the centre of the pupil;
determining a position of the pupil of the user's eye, based on the specific direction of the light beam at which the light beam is incident upon the centre of the pupil, a distance of the pupil from the at least one light source, and a position of the at least one light source; and
determining a gaze direction of the user's eye, based on the position of the pupil of the user's eye.