The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 2024
Filed:
Sep. 14, 2020
Arizona Board of Regents on Behalf of the University of Arizona, Tucson, AZ (US);
Yuzuru Takashima, Tucson, AZ (US);
ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA, Tucson, AZ (US);
Abstract
A gaze tracking platform for human-machine interface device, such as a wearable Augmented Reality Near-to-Eye Display. The gaze tracking method, digital illumination assisted analog feedback tracking employs neither auxiliary camera nor digital image processing of human eye image that confronts challenges in gaze tracking speed, power, cost and space. Instead, an analog-digital hybrid method to track the gaze inspired by the groove tracking method that is widely adopted for optical data storage systems. In the method, a digital micromirror device generates angular modulated and infrared illuminating beam. The cornea reflects the infrared light and a segmented photodiode detects the reflection while providing a feedback servo signal to the digital micromirror device controller. The feedback signal is integrated over a time provides the variation gaze. Moreover, infrared and angularly modulated illumination is time-multiplexed with information displayed in visible wavelength. In this manner, single display device is dual used for information display and gaze tracking that benefits especially augmented reality devices in terms of achieving small device form factor.