Global Patent Index - EP 1051058 A2

EP 1051058 A2 2000-11-08 - Piezoelectric audio device and method for sound production

Title (en)

Piezoelectric audio device and method for sound production

Title (de)

Piezoelektrisches Audiogerät und Verfahren zur Schallwiedergabe

Title (fr)

Dispositif audio piézoélectrique et méthode pour la reproduction de son

Publication

EP 1051058 A2 (EN)

Application

EP 00106906 A

Priority

FI 991061 A

Abstract (en)

An arrangement (1) to improve the sound quality of a piezoelectric element actuating element (AE). A sensing element (ME) is attached to the piezoelectric element to supply an electric response to movement of the element when the plate vibrates producing a sound. The response is electrically filtered in order to compensate said mechanical resonance frequency band for stabilisation of said first signal. The filtered response is inverting summed by a summation node (SN) with the audio signal to be reproduced in order to compensate the otherwise exaggerated amplitude at these resonance frequencies. <IMAGE>

IPC 1-7 (main, further and additional classification)

H04R 17/00

IPC 8 full level (invention and additional information)

H04R 3/04 (2006.01); H04R 17/00 (2006.01)

CPC (invention and additional information)

H04R 17/00 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1051058 A2 20001108; EP 1051058 A3 20040929; FI 114079 B 20040730; FI 991061 A0 19990507; FI 991061 A 20001108; JP 2000333288 A 20001130

INPADOC legal status


2005-12-28 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20050330

2005-07-21 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID

2005-06-15 [AKX] PAYMENT OF DESIGNATION FEES

2004-09-29 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2004-09-29 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Countries: AL LT LV MK RO SI

2002-03-13 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: NOKIA CORPORATION

2000-11-08 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2000-11-08 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI