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

Claim 0:
1. An eye-tracking system comprising:
at least one light source;
means for changing a direction of a light beam emitted by the at least one light source, wherein said means is to be employed to steer the light beam to scan a surface of a user's eye; and
at least one light sensor that is to be employed to sense reflected light signals pertaining to reflections of the light beam off the surface of the user's eye,
wherein said means is to be employed to:
detect 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; and
steer 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;

wherein the eye-tracking system further comprises at least one processor configured to:
determine a specific direction of the light beam at which the light beam is incident upon the centre of the pupil;
determine 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
determine a gaze direction of the user's eye, based on the position of the pupil of the user's eye.