Tobii has been granted a patent for an eye tracking system in a Head Mounted Device. The system includes an illuminator arrangement with p-polarized light sources to reduce reflections from optic arrangements like glasses. The technology aims to improve accuracy and performance in eye tracking applications. 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 April 2024 was 53%. Grant share is based on the ratio of number of grants to total number of patents.
Eye tracking system for head mounted device with reduced reflections
A recently granted patent (Publication Number: US11966047B2) discloses an innovative eye tracking system integrated into a Head Mounted Device (HMD). The system includes an illuminator arrangement with multiple light sources, including p-polarized light sources, designed to reduce reflections from an optic arrangement in the light beam path to the user's eye. The illuminator emits p-polarized light at an angle corresponding to Brewster's angle, enhancing tracking accuracy.
Furthermore, the patent details the inclusion of polarizers in the illuminator arrangement to linearly polarize light for optimal tracking performance. The system's circuitry is configured to identify reflections from the optic arrangement and selectively switch off specific light sources associated with these reflections. Additionally, an image sensor captures reflections from the eye and optic arrangement, enabling the system to estimate gaze based on pupil and corneal reflections. The HMD can be utilized for Virtual Reality (VR) or Augmented Reality (AR) applications, showcasing the versatility of the eye tracking system in various immersive technologies.
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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.
