US 11,940,329 B2
Voice coils for use with temperature sensors and devices including the same
James Marchant, Los Gatos, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Appl. No. 17/275,338
Filed by Google LLC, Mountain View, CA (US)
PCT Filed Apr. 24, 2020, PCT No. PCT/US2020/029684
§ 371(c)(1), (2) Date Mar. 11, 2021,
PCT Pub. No. WO2021/216076, PCT Pub. Date Oct. 28, 2021.
Prior Publication US 2023/0032222 A1, Feb. 2, 2023
Int. Cl. G01K 1/02 (2021.01); G01K 7/42 (2006.01); H04R 3/00 (2006.01)
CPC G01K 1/026 (2013.01) [G01K 7/427 (2013.01); H04R 3/007 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A device comprising:
a panel audio loudspeaker comprising a panel extending in a plane and an actuator coupled to the panel, the actuator comprising:
a voice coil attached to and extending from the panel along an axis;
a magnet assembly suspended from the panel via one or more springs; and
a temperature sensor in electrical contact with the coil at three different axial locations, the temperature sensor being configured, during operation of the device, to measure a temperature of the coil based on voltage measurements at the three different axial locations.