Power management in an eye-tracking system
First Claim
Patent Images
1. 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.
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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.
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Citations
24 Claims
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1. An imaging device adapted to provide data measurements by imaging at least one eye of a viewer, wherein:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. 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. - View Dependent Claims (19, 20)
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21. A method in a personal computer system, the personal computer system comprising:
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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. - View Dependent Claims (22, 23, 24)
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Specification