(19)

(11)

EP 0 842 454 A1

(12)

(43) Date of publication: 20.05.1998 Bulletin 1998/21 (21) Application number: 96925913.0 (22) Date of filing: 31.07.1996

(51) International Patent Classification (IPC):  G02F 1/ 13( . ) G02F 1/ 1335( . ) G02F 1/ 137( . ) G02B 5/ 30( . ) G02F 1/ 13357( . ) (86) International application number: PCT/GB1996/001870 (87) International publication number: WO 1997/005520 (13.02.1997 Gazette 1997/08)

(84) Designated Contracting States: DE ES FR GB IT NL SE (30) Priority: 31.07.1995 GB 19950015656 (71) Applicant: Screen Technology Limited Harston, Cambridge CB2 5NX (GB)	(72) Inventors: CROSSLAND, William, Alden Harlow, Essex CM20 2QD (GB) DAVEY, Anthony, Bernard Bishop Stortford, Hertfordshire CM23 5N (GB) (74) Representative: Gibbs, Christopher Stephen, et al  Haseltine Lake & Co., Imperial House, 15-19 Kingsway London WC2B 6UD London WC2B 6UD (GB)