US 11,720,170 B2
Method, device, and system of measuring eye convergence angle
Dominique Paul Barbier, Scotts Valley, CA (US)
Assigned to STMicroelectronics, Inc., Coppell, TX (US)
Filed by STMicroelectronics, Inc., Coppell, TX (US)
Filed on Dec. 26, 2019, as Appl. No. 16/727,795.
Prior Publication US 2021/0199431 A1, Jul. 1, 2021
Int. Cl. G06F 3/01 (2006.01); G01C 3/06 (2006.01); G01C 3/14 (2006.01); G02C 7/04 (2006.01); G01C 3/22 (2006.01)
CPC G06F 3/013 (2013.01) [G01C 3/06 (2013.01); G01C 3/14 (2013.01); G01C 3/22 (2013.01); G02C 7/04 (2013.01); G02C 2200/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method, comprising:
positioning first and second triaxial magnetometers respectfully in front of a first eye and a second eye to synchronize respective movements of the first and second triaxial magnetometers with respective movements of a center of the first eye and a center of the second eye, wherein first and second eye gaze direction vectors extend from the centers of the first and second eye, respectively;
each of the first and second triaxial magnetometers detecting a direction of a magnetic field, having X-axis, Y-axis, and Z-axis components, from the first and second triaxial magnetometers, respectively, to an object within a field of view of the first and second eyes, wherein the X-axis, Y-axis, and Z-axis are orthogonal to each other;
determining the first and second eye gaze direction vectors based on the X-axis, Y-axis, Z-axis components detected by the first and second triaxial magnetometers, respectively; and
calculating an eye convergence angle of the object based on the first and second eye gaze direction vectors.