Head tracking system
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United States of America Patent
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Oct 10, 2023
Grant Date -
Dec 22, 2022
app pub date -
Nov 2, 2020
filing date -
Nov 5, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A head tracking system for use in a headrest, includes at least one optical circuit having a plurality of sensors. Each sensor arranged to detect light reflected from at least portion of an illuminated scene. The portion of the scene contains at least a part of a head to be tracked, and to provides an output signal corresponding to an amount of reflected light detected by the sensor. An acquisition circuit is arranged to receive a plurality of output signals from the plurality of sensors and to derive a frame from said output signals. A processing unit is arranged to receive the frame and to derive an indication of a change in position and/or orientation of the head by comparing the received frame with one or more frames obtained at different moments in time.
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