EP 2127468 A1 20091202 - LOUDSPEAKER MADE FROM FILMS
Title (en)
LOUDSPEAKER MADE FROM FILMS
Title (de)
LAUTSPRECHER AUFGEBAUT AUS FOLIEN
Title (fr)
HAUT-PARLEUR CONSTITUÉ DE FEUILLES
Publication
Application
Priority
- EP 2008051796 W 20080214
- DE 102007007957 A 20070217
Abstract (en)
[origin: WO2008098988A1] The invention relates to a loudspeaker with a large surface area of a sandwich layer construction, comprising several conducting and non-conducting layers, forming an active sound-emitting loudspeaker surface with a first membrane film (1) coated with an electrically conducting layer (3), a second membrane film (2) coated with an electrically conducting layer (4), a static high voltage supply (9), generating an electric field between the first electrically conducting layer (3) and the second electrically conducting layer (4), an audio source (10) which influences the high voltage field between the first electrically-conducting layer (3) ad the second electrically-conducting layer (4) by means of a capacitor (15). The invention is characterised in that the first membrane film, coated with an electrically conducting layer, forms a sandwich with the second membrane film (2), coated with an electrically-conducting layer, across a first elastic and non-conducting buffer layer (5), extending over the active loudspeaker surface.
IPC 8 full level
H04R 7/00 (2006.01); H04R 7/04 (2006.01); H04R 7/06 (2006.01); H04R 7/10 (2006.01); H04R 19/01 (2006.01); H04R 19/02 (2006.01)
CPC (source: EP KR US)
G10K 9/12 (2013.01 - EP US); H04R 7/04 (2013.01 - KR); H04R 7/06 (2013.01 - KR US); H04R 7/10 (2013.01 - EP US); H04R 19/01 (2013.01 - KR); H04R 19/02 (2013.01 - KR); H04R 2201/021 (2013.01 - EP US)
Citation (search report)
See references of WO 2008098988A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 102007007957 A1 20080821; EP 2127468 A1 20091202; KR 20090120463 A 20091124; TW 200917877 A 20090416; US 2010135519 A1 20100603; US 2014098984 A1 20140410; WO 2008098988 A1 20080821
DOCDB simple family (application)
DE 102007007957 A 20070217; EP 08716850 A 20080214; EP 2008051796 W 20080214; KR 20097017026 A 20080214; TW 97105325 A 20080215; US 201314104330 A 20131212; US 52751408 A 20080214