Apparatus for tracking the human eye with a retinal scanning display, and method thereof
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United States of America Patent
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-
Sep 19, 2000
Issued Date -
N/A
app pub date -
Aug 9, 1999
filing date -
Aug 9, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A retinal scanning display, an active-pixel image sensor array, and an im processor track the movements of the human eye. The scanning nature of the display acts as a sequential source of eye illumination. The active-pixel image sensor array is directed toward the cornea of the eye through a matrix of micro-lens. The sensor is integrated with a comparator array which is interfaced to bilateral switches. An element address encoder and latch determines the sensor element which reaches maximum intensity during the raster-scan period of the display driver. Over a display field refresh cycle, the invention maps the corneal surface to a data table by pairing sensor activations to the specular reflections from the cornea of the sequenced source lights.
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