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EP 1 756 628 A1

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(43) Date of publication: 28.02.2007 Bulletin 2007/09 (21) Application number: 05742782.5 (22) Date of filing: 27.05.2005

(51) International Patent Classification (IPC):  G02B 3/14(2006.01) G02B 6/35(2006.01) G02F 1/09(2006.01) G02B 26/02(2006.01) (86) International application number: PCT/IB2005/051738 (87) International publication number: WO 2005/119306 (15.12.2005 Gazette 2005/50)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR (30) Priority: 01.06.2004 EP 04102437 05.11.2004 GB 0424451 (71) Applicant: Koninklijke Philips Electronics N.V. 5621 BA Eindhoven (NL)

(72) Inventors: KUIPER, Stein, Philips Intell. Property & Stndrds. Redhill Surrey RH1 5HA (GB) HENDRIKS, B. H. W., Philips Int. Prop. & Stndrds. Redhill Surrey RH1 5HA (GB) VAN DER AA, M. J. M., Philips Int. Prop. & Stnds. Redhill Surrey RH1 5HA (GB) SCHLEIPEN, J. J. H. B., Philips Int. Prop. & Stnds Redhill Surrey RH1 5HA (GB) VAN SANTEN, H., Philips Intell. Property & Stnds. Redhill Surrey RH1 5HA (GB) (74) Representative: Rolfes, Johannes Gerardus Albertus et al Philips Intellectual Property & Standards P.O. Box 220 5600 AE Eindhoven 5600 AE Eindhoven (NL)