Power management in an eye-tracking system
AssigneeTobii AB
InventorsHenrik Eskilsson, Mårten Skogö, John Elvesjö, Peter Blixt
Life of this patent
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Abstract
An imaging device adapted to provide eye-tracking data by imaging at least one eye of a viewer, wherein: the imaging device is switchable between at least an active mode and a ready mode; the imaging device is configured, in the active mode, to use active eye illumination, which enables tracking of a corneal reflection, and to provide eye tracking data which include eye position and eye orientation; and the imaging device is configured, in the ready mode, to reduce an illumination intensity from a value the illumination intensity has in the active mode.
Claims24
An imaging device adapted to provide data measurements by imaging at least one eye of a viewer, wherein:
- the data measurements describe one or more of eye position or eye orientation;
- the imaging device is switchable between at least an active mode and a ready mode;
- the imaging device is configured, in the active mode, to maintain a first result history of the data measurements based on data gathered based on first criteria, the first criteria including a first frame rate;
- the imaging device is configured, in the ready mode, to maintain a second result history of the data measurements based on data gathered based on second criteria, the second criteria including a second frame rate that is lower than the first frame rate;
- and
- upon switching to the active mode from the ready mode, the imaging device provides additional data based on a combination of the data measurements from the first result history and the data measurements from the second result history.
A method in an imaging device adapted to provide data measurements by imaging at least one eye of a viewer,
- wherein the data measurements describe one or more of eye position or eye orientation;
- wherein said method comprises the steps of:
- switching the imaging device between at least an active mode and a ready mode;
- in the active mode, maintaining a first result history of the data measurements based on data gathered based on first criteria, the first criteria including a first frame rate;
- and
- in the ready mode, maintaining a second result history of the data measurements based on data gathered based on second criteria, the second criteria including a second frame rate that is lower than the first frame rate;
- and
- upon switching to the active mode from the ready mode, providing additional data based on a combination of the data measurements from the first result history and the data measurements from the second result history.
A method in a personal computer system, the personal computer system comprising:
- a visual display;
- an imaging device adapted to provide data measurements by imaging at least one eye of a viewer of the visual display, wherein the data measurements describe one or more of eye position or eye orientation;
- and
- an input device for accepting eye-tracking control data and other input data,
- said method comprising the steps of:
- switching the imaging device between at least an active mode and a ready mode;
- in the active mode, maintaining a first result history of the data measurements based on data gathered based on first criteria, the first criteria including a first frame rate;
- and
- in the ready mode, maintaining a second result history of the data measurements based on data gathered based on second criteria, the second criteria including a second frame rate that is lower than the first frame rate;
- and
- upon switching to the active mode from the ready mode, providing additional data based on a combination of the data measurements from the first result history and the data measurements from the second result history.
Dependencies are inferred from the claim text.