(19)

(11)

EP 0 442 885 A1

(12)

(43) Date of publication: 28.08.1991 Bulletin 1991/35 (21) Application number: 89906275.0 (22) Date of filing: 30.05.1989

(51) International Patent Classification (IPC):  H05B 33/ 06( . ) H05B 33/ 12( . ) H05B 33/ 10( . ) H05B 33/ 26( . ) (86) International application number: PCT/US1989/002335 (87) International publication number: WO 1989/012376 (14.12.1989 Gazette 1989/29)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 31.05.1988 US 19880200616 (71) Applicant: ELECTROLUMINESCENT TECHNOLOGIES CORPORATION Horsham, PA 19044 (US)	(72) Inventors: SHARPLESS, Edward, N. Somerville, NJ 08876 (US) McMANUS, Eugene, W. Downingtown, PA 19335 (US) (74) Representative: Sanderson, Laurence Andrew, et al  SANDERSON & CO. European Patent Attorneys 34, East Stockwell Street Colchester Essex CO1 1ST Colchester Essex CO1 1ST (GB)