Google Inc.

Bhaskar Vadathavoor

Daniel Adam Warren

Debanjan Mukherjee

Ian C Smith

Lawrence F Heyl

Basheer Tome

Dietrich Ho

William Alan Saperstein

Chun Yat Frank Li

Chintan Trehan

Eric Dayringer

Morakinyo John Aina

Shiblee Imtiaz Hasan

Sarnab Bhattacharya

An augmented reality/virtual reality (AR/VR) system employs a tracking system for tracking one or more components of the AR/VR system using a generated electromagnetic (EM) field. The tracking system employs an EM coil for generating the EM field or, alternatively, sensing the EM field. The EM coil includes a core substrate and thin metal foil wrapped around the core substrate in three orthogonal axes. The EM coil is effectively 'hollow' in that it weighs less than a conventional solid ferrite or ferrous core of comparable dimensions, either through the use of one or more openings formed in the core substrate, the use of a material less dense than ferrite or ferrous materials, the formation of the core substrate as a hollow framework, or a combination thereof. The resulting EM coil thus weighs less than conventional solid-core EM coils, thereby reducing user fatigue and the possibility of misalignment of the EM coil as a result from a drop impact of the device implementing the EM coil.

Hollow core electromagnetic coil

A method that includes employing several sensors associated with a handheld controller, where each of the sensors is made of one of a hover, touch, and force/pressure sensor, and generating, by one or more of the sensors, sensor data associated with the position of a user's hand and finger in relation to the handheld controller. The method continues with combining the sensor data from several sensors to form aggregate sensor data, sending the aggregate sensor data to a processor, and generating an estimated position of the user's hand and fingers based on the aggregate sensor data.

Virtual reality / augmented reality handheld controller sensing

Systems for ensuring an audible alarm circuit sounds at a minimum magnitude of loudness are provided. Different circuitry embodiments discussed herein are each capable of assisting the audible alarm circuit in maintaining a minimum loudness threshold. Audible alarm circuit operation optimization can be achieved using embodiments that fall within anyone of four general categories: compensation networks, direct drive, dynamic tuning, and microphone feedback based dynamic tuning. Use of such circuitry can increase production yields by compensating for manufacturing variations of alarm components and aging characteristics of the components.

Device with precision frequency stabilized audible alarm circuit

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Mountain View, CA, United States of America

Bhaskar Vadathavoor