US 11,726,585 B2
Inductive beacon for time-keying virtual reality applications
Vladimir Alexander Muratov, San Jose, CA (US); Da-Shan Shiu, Taipei (TW); William Plumb, Charlestown, MA (US); and Philip Frank Tustin, North Andover, MA (US)
Assigned to MEDIATEK Singapore Pte. Ltd., Singapore (SG)
Filed by MEDIATEK Singapore Pte. Ltd., Singapore (SG)
Filed on Sep. 13, 2021, as Appl. No. 17/473,995.
Application 17/473,995 is a division of application No. 16/026,571, filed on Jul. 3, 2018, granted, now 11,237,649.
Claims priority of provisional application 62/543,402, filed on Aug. 10, 2017.
Prior Publication US 2022/0066572 A1, Mar. 3, 2022
Int. Cl. G06F 3/038 (2013.01); G06F 3/01 (2006.01); G01S 1/70 (2006.01); G01D 5/20 (2006.01); H01F 7/06 (2006.01)
CPC G06F 3/038 (2013.01) [G01D 5/2006 (2013.01); G01S 1/7036 (2019.08); G01S 1/7038 (2019.08); G06F 3/011 (2013.01); H01F 7/064 (2013.01); G06F 3/014 (2013.01); G06F 3/017 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for generating a beacon signal to be used in determining a position and/or orientation of an object, the method comprising:
causing a first coil to generate a first magnetic field and a second coil to generate a second magnetic field, wherein the causing comprises:
providing a first signal waveform that is binary, and has a fundamental harmonic frequency, to a first driver and controlling the first driver to provide a first electric current to the first coil and a first capacitor in series with the first coil using the first signal waveform, a series combination of the first capacitor and the first coil exhibiting a resonant frequency, wherein the fundamental harmonic frequency is different from the resonant frequency;
providing a second signal waveform that is binary to a second driver and controlling the second driver to provide a second electric current to the second coil and a second capacitor in series with the second coil using the second signal waveform; and
with an activation circuit, providing a supply voltage to the first driver that increases over time.