(19)

(11)

EP 1 161 706 A1

(12)

(43) Date of publication: 12.12.2001 Bulletin 2001/50 (21) Application number: 00914593.9 (22) Date of filing: 16.02.2000

(51) International Patent Classification (IPC)7: G02F 1/1333 (86) International application number: PCT/US0003/866 (87) International publication number: WO 0049/452 (24.08.2000 Gazette 2000/34)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (30) Priority: 17.02.1999 US 120505 P (71) Applicant: KENT STATE UNIVERSITY Kent, OH 44242-0001 (US)	(72) Inventors: KUMAR, Satyendra Kent, OH 44240 (US) KIM, Jae-Hoon Yongin-city,Kyunggi-do (KR) (74) Representative: Makovski, Priscilla Mary  BARKER BRETTELL 138 Hagley Road EdgbastonBirmingham B16 9PW EdgbastonBirmingham B16 9PW (GB)