EP 1336322 B1 20081126 - ELECTROMAGNETIC DRIVER FOR A PLANAR DIAPHRAGM LOUDSPEAKER
Title (en)
ELECTROMAGNETIC DRIVER FOR A PLANAR DIAPHRAGM LOUDSPEAKER
Title (de)
ELEKTROMAGNETISCHER TREIBER FÜR EINEN PLATTENLAUTSPRECHER
Title (fr)
DISPOSITIF D'EXCITATION ELECTROMAGNETIQUE POUR UN HAUT-PARLEUR A MEMBRANE PLANE
Publication
Application
Priority
- DE 10058104 A 20001123
- EP 0111184 W 20010926
Abstract (en)
[origin: WO0243435A2] The invention relates to an electromagnetic driver comprising a soft magnetic core in the form of an E with three legs and a back, an alternating field driver, magnetically coupled to the soft magnetic core, for generating an alternating magnetic field in the soft magnetic core, depending upon a sound signal, a constant field driver magnetically coupled to the soft magnetic core for generation of a constant magnetic field in the soft magnetic core, a soft magnetic element for coupling to the plate of the planar diaphragm loudspeaker, lying opposite the back and magnetically closing the legs across at least one small induction gap, whereby the constant field and the alternating field are asymmetrically superimposed such that a resulting force, or a resulting torque on the soft magnetic element is proportional to the sound signal.
IPC 8 full level
H04R 11/02 (2006.01); H04R 7/04 (2006.01)
CPC (source: EP US)
H04R 11/02 (2013.01 - EP US); H04R 7/045 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 0243435 A2 20020530; WO 0243435 A3 20021128; DE 10058104 A1 20020606; DE 10058104 C2 20031030; DE 50114531 D1 20090108; EP 1336322 A2 20030820; EP 1336322 B1 20081126; US 2004028254 A1 20040212; US 2007064972 A1 20070322; US 7158651 B2 20070102; US 7302077 B2 20071127
DOCDB simple family (application)
EP 0111184 W 20010926; DE 10058104 A 20001123; DE 50114531 T 20010926; EP 01997969 A 20010926; US 43248703 A 20030521; US 60118506 A 20061116