(19)

(11)

EP 0 808 511 A1

(12)

(43) Date of publication: 26.11.1997 Bulletin 1997/48 (21) Application number: 96937473.0 (22) Date of filing: 27.11.1996

(51) International Patent Classification (IPC):  H01J 29/ 46( . ) H01J 31/ 12( . ) H01J 29/ 52( . ) (86) International application number: PCT/IB1996/001307 (87) International publication number: WO 1997/022135 (19.06.1997 Gazette 1997/26)

(84) Designated Contracting States: DE FR GB (30) Priority: 11.12.1995 EP 19950203445 (71) Applicant: Philips Electronics N.V. 5621 BA Eindhoven (NL)	(72) Inventors: LAMBERT, Nicolaas NL-5656 AA Eindhoven (NL) VAN VELZEN, Jeroen NL-5656 AA Eindhoven (NL) (74) Representative: Van Straaten, Joop, et al  INTERNATIONAAL OCTROOIBUREAU B.V., Prof. Holstlaan 6 5656 AA Eindhoven 5656 AA Eindhoven (NL)