Eye tracking apparatus including indication of eye direction
First Claim
1. An eye tracking apparatus comprisinga) a target display adapted to project a moveable image of a target into a user'"'"'s field of vision,b) an illumination source adapted to project a reference point onto a user'"'"'s eye,c) a sensor arranged to monitor a user'"'"'s eye, including the reference point reflected from the eye, andd) a processor adapted to receive information from the sensor, and to determine the position of a feature of a user'"'"'s eye relative to the reference point,wherein the apparatus is arranged such that said determined position provides a direct indication of eye direction relative to the target direction.
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Accused Products
Abstract
An eye tracking apparatus and method of eye monitoring, comprising a target display adapted to project a moveable image of a target into a user'"'"'s field of vision, an illumination source adapted to project a reference point onto a user'"'"'s eye, a sensor adapted to monitor a user'"'"'s eye, and a processor adapted to determine the position of a feature of a user'"'"'s eye relative to the reference point, wherein the apparatus is arranged such that said determined position provides a direct indication of eye direction relative to the target direction.
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Citations
21 Claims
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1. An eye tracking apparatus comprising
a) a target display adapted to project a moveable image of a target into a user'"'"'s field of vision, b) an illumination source adapted to project a reference point onto a user'"'"'s eye, c) a sensor arranged to monitor a user'"'"'s eye, including the reference point reflected from the eye, and d) a processor adapted to receive information from the sensor, and to determine the position of a feature of a user'"'"'s eye relative to the reference point, wherein the apparatus is arranged such that said determined position provides a direct indication of eye direction relative to the target direction.
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11. A method of eye monitoring, in which a moveable image of a target is projected into a user'"'"'s field of vision, and an image of the user'"'"'s eye is formed on an image sensor, said method comprising:
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(a) projecting a reference point onto the user'"'"'s eye, (b) arranging for the selected reference point to provide, in the image, an indication of the position of the target on the user'"'"'s eye, (c) analysing the image to determine the position of a feature of the user'"'"'s eye with respect to the reference point. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An eye tracking apparatus comprising
a) a target display adapted to project a moveable image of a target into a user'"'"'s field of vision, b) an illumination source adapted to project a reference point onto a user'"'"'s eye, c) a sensor arranged to monitor a user'"'"'s eye, including the reference point reflected from the eye, and d) a processor adapted to receive information from the sensor, and to determine therefrom the position of a feature of a user'"'"'s eye relative to the reference point, wherein the apparatus is arranged such that the determined position provides a direct indication of eye direction relative to the target direction, the target display is adapted to project the moveable image along a projection path, the illumination source is adapted to project the reference point along an illumination path, and the projection path and the illumination path are synchronized.
Specification