(19)

(11)

EP 0 963 569 A1

(12)

(43) Date of publication: 15.12.1999 Bulletin 1999/50 (21) Application number: 97916534.0 (22) Date of filing: 10.04.1997

(51) International Patent Classification (IPC):  G02F 1/ 1335( . ) G02F 1/ 137( . ) G02F 1/ 13357( . ) (86) International application number: PCT/GB1997/000997 (87) International publication number: WO 1997/038348 (16.10.1997 Gazette 1997/44)

(84) Designated Contracting States: DE FR GB NL (30) Priority: 11.04.1996 GB 19960007531 (71) Applicant: Screen Technology Limited Harston, Cambridge CB2 5NX (GB)

(72) Inventors: CROSSLAND, William, Alden Harlow, Essex CM20 2QD (GB) DAVEY, Anthony, Bernard Hertfordshire CM23 5NG (GB) GEAKE, Vincent, Glenn Thriplow, Cambridgeshire SG8 7RD (GB) SPRINGLE, Ian, David Congleton, Cheshire CW12 4JA (GB) (74) Representative: Skelton, Stephen Richard, et al  Ministry of Defence Directorate of Intellectual Property Rights Formalities Section Poplar 2 MOD Abbey Wood 19 Bristol BS34 8JH Bristol BS34 8JH (GB)