US 12,260,019 B2
System and method for continuous calibration of eye tracking systems used in VR/AR HMD units
Piotr Krukowski, Beacon, NY (US); Michal Meina, Beacon, NY (US); and Piotr Redmerski, Beacon, NY (US)
Assigned to Inseye Inc., Beacon, NY (US)
Filed by Inseye Inc., Beacon, NY (US)
Filed on Oct. 4, 2023, as Appl. No. 18/376,707.
Application 18/376,707 is a continuation of application No. 18/130,699, filed on Apr. 4, 2023, granted, now 11,816,260.
Claims priority of provisional application 63/327,955, filed on Apr. 6, 2022.
Prior Publication US 2024/0231480 A1, Jul. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/01 (2006.01); G02B 27/01 (2006.01); G06T 17/00 (2006.01); G06V 10/46 (2022.01)
CPC G06F 3/013 (2013.01) [G02B 27/0172 (2013.01); G06T 17/00 (2013.01); G06V 10/462 (2022.01); G02B 2027/0178 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A virtual reality/augmented reality (VR/AR) wearable assembly comprising:
a wearable frame adapted to be worn over a user's eyes;
a display system mounted to the wearable frame and configured to project digital image onto the user's field of vision;
a pair of photosensor oculography (PSOG) eye tracking assemblies mounted to the wearable frame such that each PSOG eye tracking assembly is positioned adjacent a corresponding eye of the user, each PSOG eye tracking assembly including a plurality of groups of photosensors and light emitters; and
one or more processors coupled to each PSOG eye tracking assembly and the display system, the one or more processors configured to execute an algorithm to calibrate the each PSOG eye tracking assembly including the steps of:
rendering a sequence of images on the display system; and
calibrating a corresponding PSOG eye tracking assembly by:
determining a predicted fixation location associated with a corresponding rendered image;
determining an estimated gaze position location of the corresponding eye of the user when viewing the corresponding rendered image by alternating illumination of the groups of light emitters to generate predefined lighting patterns;
determining an offset gaze position value by mapping the estimated gaze position location to the predicted fixation location; and
determining a corrected gaze position location of the corresponding eye of the patient user based on the estimated gaze position location and the determined offset gaze position value.