公开(公告)号：US10804027B2

公开(公告)日：2020-10-13

申请号：US16244552

申请日：2019-01-10

Applicant: GOOGLE LLC

Inventor： Eric Dayringer ,  Chintan Trehan ,  Bhaskar Vadathavoor

IPC: H01F27/28 ,  G06F3/01 ,  G06F3/0346 ,  H01F5/02 ,  H01F5/00 ,  G06F1/16

Abstract: 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.

公开(公告)号：US10599259B2

公开(公告)日：2020-03-24

申请号：US16111702

申请日：2018-08-24

Applicant: Google LLC

Inventor： Debanjan Mukherjee ,  Basheer Tome ,  Sarnab Bhattacharya ,  Bhaskar Vadathavoor ,  Shiblee Imtiaz Hasan ,  Chun Yat Frank Li

IPC: G06F3/041 ,  G06F3/044 ,  G06F3/01 ,  G06F3/046

Abstract: 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.