Magic Leap, Inc.

Motorola Corporation

Brian Bucknor

James M Powderly

Haney Awad

William Wheeler

Savannah Niles

Michael Janusz Woods

Christopher David Nesladek

Marshal Ainsworth Fontaine

Isioma Osagbemwenorue Azu

Evan Francis Rynk

James William Palmer

Aly H M Aly

Christopher Lopez

Tal Mor

Roberto Gautier

William J Wingfield

Humberto E Garcia

Sergio Bustamante

John Ballen

Russell S Nelson

Brian David Schwab

Aly HM Aly

Head-mounted augmented reality (AR) devices can track pose of a wearer's head to provide a three-dimensional virtual representation of objects in the wearer's environment. An electromagnetic (EM) tracking system can track head or body pose. A handheld user input device can include an EM emitter that generates an EM field, and the head-mounted AR device can include an EM sensor that senses the EM field. EM information from the sensor can be analyzed to determine location and/or orientation of the sensor and thereby the wearer's pose. The EM emitter and sensor may utilize time division multiplexing (TDM) or dynamic frequency tuning to operate at multiple frequencies. Voltage gain control may be implemented in the transmitter, rather than the sensor, allowing smaller and lighter weight sensor designs. The EM sensor can implement noise cancellation to reduce the level of EM interference generated by nearby audio speakers.

Electromagnetic tracking with augmented reality systems

A device () includes an AM generating circuit () which couples interference () into another part of the device (). A second AM signal () is generated, having inverse modulation relative to the first AM signal, and is coupled to the affected part of the device to counteract the interference by reducing the effective harmonic content of the first AM signal.

Method and apparatus for reducing intra-device interference

A GPS receiver circuit () for reducing insertion loss. The receiver circuit () includes a switch () for diverting input signals between a filtered pathway () and a short circuit pathway () to an amplifier (). The amplifier () output feeds an automatic gain controller () that senses a noise level in the output of the amplifier () and adjusts a gain of the amplifier () in response to the noise level. The receiver circuit () also includes a threshold detector () with an input coupled to the output of the automatic gain controller () and an output coupled to the switch () for selecting between the filtered pathway () and the short circuit pathway (), thereby removing the filter () from the signal path if not needed.

Dynamic pre-selector for a GPS receiver

A device () has a port (), a first SPS receiver (), and a processor () coupled to the first SPS receiver and the port. The processor is programmed to detect () a second SPS receiver () at the port, deactivate () the first SPS receiver, and determine () a location of the device according to signals received by the second SPS receiver from GPS satellites.

Selecting an optimal satellite positioning system receiver

Growing community of inventors

Miramar, FL, United States of America

Brian Bucknor