(19)

(11)

EP 1 356 491 A1

(12)

(43) Date of publication: 29.10.2003 Bulletin 2003/44 (21) Application number: 02707481.4 (22) Date of filing: 16.01.2002

(51) International Patent Classification (IPC)7: H01J 29/07 (86) International application number: PCT/US0201/053 (87) International publication number: WO 0205/8098 (25.07.2002 Gazette 2002/30)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 20.01.2001 US 262765 P (71) Applicant: Thomson Licensing S.A. 92648 Boulogne Cedex (FR)	(72) Inventor: BUCHER, Alan, Weir Manheim, PA 17545 (US) (74) Representative: Kerber, Thierry  Thomson46, quai Alphonse Le Gallo 92648 Boulogne cedex 92648 Boulogne cedex (FR)