SYSTEMS, DEVICES, AND METHODS FOR LASER EYE TRACKING IN WEARABLE HEADS-UP DISPLAYS

Systems, devices, and methods that use elements of a scanning laser projector ("SLP") to determine the gaze direction of a user of a wearable heads-up display ("WHUD") are described. An infrared laser diode is added to an RGB SLP and an infrared photodetector is aligned to detect...

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Bibliographic Details
Main Authors Bhargava, Mayank, Aleem, Idris S
Format Patent
LanguageEnglish
Published 31.05.2018
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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Summary:Systems, devices, and methods that use elements of a scanning laser projector ("SLP") to determine the gaze direction of a user of a wearable heads-up display ("WHUD") are described. An infrared laser diode is added to an RGB SLP and an infrared photodetector is aligned to detect reflections of the infrared light from the eye. A scan mirror in the SLP sweeps through a range of orientations and the intensities of reflections of the infrared light are monitored by a processor to determine when a spectral reflection or "glint" is produced. The processor determines the orientation of the scan mirror that produced the glint and maps the scan mirror orientation to a region in the field of view of the eye of the user, such as a region in visible display content projected by the WHUD, to determine the gaze direction of the user.
Bibliography:Application Number: US201715827667