(19)

(11)

EP 1 687 671 A1

(12)

(43) Date of publication: 09.08.2006 Bulletin 2006/32 (21) Application number: 04797242.7 (22) Date of filing: 12.11.2004

(51) International Patent Classification (IPC):  G02F 1/21(2006.01) G02F 1/061(2006.01) (86) International application number: PCT/CH2004/000685 (87) International publication number: WO 2005/052680 (09.06.2005 Gazette 2005/23)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 25.11.2003 EP 03405840 (71) Applicant: CSEM Centre Suisse d'Electronique et de Microtechnique SA 2007 Neuchâtel (CH)	(72) Inventor: GUBLER, Ulrich CH-6006 Luzern (CH) (74) Representative: Brulliard, Joel  c/o CSEM Centre Suisse d'Electronique et de Microtechnique SA, Rue Jaquet-Droz 1 2007 Neuchâtel 2007 Neuchâtel (CH)