Tobii‘s patented eye tracking system includes an illuminator, image sensor, and Fresnel lens to accurately track eye movements. Glints in the image are identified and classified to exclude false glints, improving the system’s precision. GlobalData’s report on Tobii gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Tobii, Metaverse display interfaces was a key innovation area identified from patents. Tobii's grant share as of January 2024 was 51%. Grant share is based on the ratio of number of grants to total number of patents.
Eye tracking system with fresnel lens to detect false glints
A recently granted patent (Publication Number: US11854213B2) discloses an eye tracking system that includes at least one illuminator and an image sensor to produce an image of a user's eye. The system incorporates a Fresnel lens between the image sensor and the eye, with processing circuitry to identify and assign angular positions to glints in the image. By determining the number of glints with the same angular position and classifying false glints, the system enhances the accuracy of eye tracking by excluding false glints from further processing.
Moreover, the patent extends to a head-mounted device equipped with a display and the same eye tracking system. The device allows users to view the display while the system captures and processes eye movements. The method outlined in the patent involves capturing an image of the user's eye, identifying glints, assigning angular positions, and classifying false glints based on predetermined criteria. By excluding false glints and focusing on accurate data, the system ensures precise eye tracking performance, enhancing user experience and interaction with the head-mounted device.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
