Patent · US Active

Eye tracking system

US11681371B2 · kind B2 · utility

0Cited by

1References

19Claims

0Family size

Assignee

Tobii AB · SE

Inventors

Joakim Zachrisson · Danderyd, SE
Simon Johansson · Danderyd, SE
Mikael Rosell · Danderyd, SE
Daniel Wrang · Danderyd, SE

Key dates

Filing date	Jun 30, 2022
Grant date	Jun 20, 2023
Priority date	—
Expiry date	Jun 30, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH04N25/135
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An eye tracking system comprising a controller configured to receive a reference image of an eye of a user and a current image of the eye of the user. The controller is also configured to determine a difference between the reference image and the current image to define a differential image. The differential image has a two dimensional pixel array of pixel locations that are arranged in a plurality of rows and columns. Each pixel location has a differential intensity value. The controller is further configured to calculate a plurality of row values by combining the differential intensity values in corresponding rows of the differential image and to determine eyelid data based on the plurality of row values.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.