Systems and methods for augmented reality

Patent metadata

Field	Value
Publication number	US-11429183-B2
Application number	US-202017137107-A
Country	US
Kind code	B2
Filing date	Dec 29, 2020
Priority date	Mar 5, 2015
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

Configurations are disclosed for presenting virtual reality and augmented reality experiences to users. An augmented reality display system comprises a handheld component housing an electromagnetic field emitter, the electromagnetic field emitter emitting a known magnetic field, the head mounted component coupled to one or more electromagnetic sensors that detect the magnetic field emitted by the electromagnetic field emitter housed in the handheld component, wherein a head pose is known, and a controller communicatively coupled to the handheld component and the head mounted component, the controller receiving magnetic field data from the handheld component, and receiving sensor data from the head mounted component, wherein the controller determining a hand pose based at least in part on the received magnetic field data and the received sensor data.

First claim

What is claimed is:

1. A method to display augmented reality, comprising:
emitting, through an electromagnetic field emitter, a known magnetic field;
measuring, through an electromagnetic sensor, a parameter related to a magnetic flux at the electromagnetic sensor as a result of the emitted known magnetic field, wherein world coordinates of the electromagnetic sensor are known;
determining pose information relative to the electromagnetic field emitter based at least in part on the measured parameter related to the magnetic flux at the electromagnetic sensor;
capturing image data through one or more cameras coupled to a head-mounted component,
determining head pose information based at least in part on a SLAM analysis utilizing the image data; and
displaying virtual content on an AR display system to a user based at least in part on both the determined pose information relative to the electromagnetic field emitter and the head pose information;
wherein the electromagnetic sensor comprises at least three coils to measure magnetic flux in three directions; and
wherein the at least three coils are integrated into the head-mounted component at different locations of the head-mounted component of the AR display system.

2. The method of claim 1 , wherein the electromagnetic field emitter resides in a mobile component of the AR display system.

3. The method of claim 2 , wherein the mobile component is a hand-held component.

4. The method of claim 2 , wherein the mobile component is a totem.

5. The method of claim 2 , wherein the mobile component is a head-mounted component of the AR display system.

6. The method of claim 1 , further comprising housing the display system in the head-mounted component, wherein the electromagnetic sensor is operatively coupled to the head-mounted component.

7. The method of claim 1 , wherein the world coordinates of the electromagnetic sensor is known based at least in part on SLAM analysis of the image data utilized to determine head pose information.

8. The methond of claim 7 , wherein the head-mounted component houses the display system.

9. The method of claim 1 , wherein the electromagnetic sensors comprise one or more inertial measurement units (IMUs).

10. The method of claim 1 , wherein the pose information corresponds to at least a position and orientation of the electromagnetic field emitter relative to the world.

11. The method of claim 1 , wherein the pose information is analyzed to determine world coordinates corresponding to the electromagnetic field emitter.

12. The method of claim 1 , further comprising detecting an interaction with one or more virtual contents based at least in part on the pose information corresponding to the electromagnetic field emitter.

13. The method of claim 12 , further comprising displaying virtual content to the user based at least in part on the detected interaction.

14. The method of claim 1 , further comprising decoupling the magnetic field emitted by the electromagnetic field emitter through a control and quick release module.

15. The method of claim 1 , further comprising determining the world coordinates of the electromagnetic field emitter through additional localization resources.

16. The method of claim 15 , wherein the additional localization resources comprises a GPS receiver.

17. The method of claim 15 , wherein the additional localization resources comprises a beacon.

18. The method of claim 1 , wherein the electromagnetic sensor comprises a stack of ferrite disks.

19. The method of claim 1 , wherein the electromagnetic sensor comprises a plurality of ferrite rods each having a polymer coating.

20. The method of claim 1 , wherein the electromagnetic sensor comprises a time division multiplexing switch.

Assignees

• Magic Leap Inc

Inventors

• Woods Michael

Classifications

• G06F3/0304

  Detection arrangements using opto-electronic means (constructional details of pointing devices not related to the detection arrangement using opto-electronic means G06F3/033; optical digitisers G06F3/042) · CPC title

• G02B27/017

  Head mounted · CPC title

• G02B2027/0187

  slaved to motion of at least a part of the body of the user, e.g. head, eye · CPC title

• G06F3/012 Primary

  Head tracking input arrangements · CPC title

• G06F3/017

  Gesture based interaction, e.g. based on a set of recognized hand gestures (interaction based on gestures traced on a digitiser G06F3/04883) · CPC title