US Patent 11415797 Eye tracking device and electronic device using same

An eye tracking device includes a substrate comprising a first substrate portion and a second substrate portion intersecting with the first substrate portion, an infrared light emitting element on the first substrate portion, and an image acquisition element on the second substrate portion. The infrared light emitting element is configured to emit infrared light to a user's eyeball. The image acquisition element and the infrared light emitting element are non-coplanar. The image acquisition element is configured to receive and sense the infrared light reflected by the eyeball for imaging.