Tobii Ab

Tobii Technology Ab

Anders Kingback

John Mikael Elvesjö

Peter Blixt

Mattias Kuldkepp

Bengt Rehnstrom

Mårten Skogö

Gunnar Troili

A visual display includes hidden reference illuminators adapted to emit invisible light for generating corneo-scleral reflections on an eye watching a screen surface of the display. The tracking of such reflections and the pupil center provides input to gaze tracking. A method for equipping and an LCD with a reference illuminator are also provided. Also provides are a system and method for determining a gaze point of an eye watching a visual display that includes reference illuminators. The determination of the gaze point may be based on an ellipsoidal cornea model.

Visual display with illuminators for gaze tracking

An eye tracker includes at least one illuminator for illuminating an eye, at least two cameras for imaging the eye and a controller. The configuration of the reference illuminator and cameras is such that, at least one camera is coaxial with a reference illuminator and at least one camera is non-coaxial with a reference illuminator. The controller selects one of the cameras to be active to increase an image quality metric and avoid obscuring objects. The eye tracker is operable in a dual-camera mode to improve accuracy.

Adaptive camera and illuminator eyetracker

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Balsta, Sweden

Anders Kingback