US 12,133,059 B2
Thin loudspeaker
Po-Lei Lee, Taoyuan (TW); and Kuo-Kai Shyu, Taoyuan (TW)
Assigned to NATIONAL CENTRAL UNIVERSITY, Taoyuan (TW)
Filed by National Central University, Taoyuan (TW)
Filed on Sep. 26, 2022, as Appl. No. 17/952,918.
Claims priority of application No. 111119397 (TW), filed on May 25, 2022.
Prior Publication US 2023/0412984 A1, Dec. 21, 2023
Int. Cl. H04R 25/00 (2006.01); H04R 7/04 (2006.01); H04R 7/22 (2006.01); H04R 9/02 (2006.01)
CPC H04R 7/04 (2013.01) [H04R 7/22 (2013.01); H04R 9/025 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A thin loudspeaker, comprising:
a magnet; and
a coil diaphragm, including a plurality of planar coils and a membrane, wherein the membrane has a plurality of laminated substrates, and the plurality of planar coils are interconnected, stacked and respectively formed on the substrates;
wherein the magnet is disposed to contact the underside of the coil diaphragm along the common central axis of the plurality of planar coils.