(19)

(11)

EP 0 880 790 A1

(12)

(43) Date of publication: 02.12.1998 Bulletin 1998/49 (21) Application number: 97929449.0 (22) Date of filing: 16.07.1997

(51) International Patent Classification (IPC):  H01J 29/ 32( . ) H01J 29/ 48( . ) H01J 29/ 76( . ) G09G 1/ 00( . ) H01J 29/ 50( . ) H01J 31/ 20( . ) (86) International application number: PCT/IB1997/000881 (87) International publication number: WO 1998/014978 (09.04.1998 Gazette 1998/14)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 30.09.1996 EP 19960202729 (71) Applicants: Koninklijke Philips Electronics N.V. 5621 BA Eindhoven (NL) PHILIPS NORDEN AB 164 85 Stockholm (SE)	(72) Inventor: VAN DER HEIJDEN, Joseph Waltherus Johannes Maria NL-5656 AA Eindhoven (NL) (74) Representative: Van Straaten, Joop  INTERNATIONAAL OCTROOIBUREAU B.V., Prof. Holstlaan 6 5656 AA Eindhoven 5656 AA Eindhoven (NL)