HIGH SPEED OPTICAL PROTECTION USING SMECTIC LIQUID CRYSTAL - Patent 0474736

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EP 0 474 736 A1

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(43)	Date of publication:
	18.03.1992 Bulletin 1992/12

(21)	Application number: 90908885.0

(22)	Date of filing: 25.05.1990

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International Patent Classification (IPC):

G02F 1/ 13^{( . )}
G02F 1/ 1337^{( . )}
G02F 1/ 139^{( . )}

G02F 1/ 00^{( . )}
G02F 1/ 137^{( . )}
G02F 1/ 35^{( . )}

(86)	International application number:
	PCT/US1990/002975

(87)	International publication number:
	WO 1990/014611 (29.11.1990 Gazette 1990/27)

(84)	Designated Contracting States:
	AT BE CH DE DK ES FR GB IT LI LU NL SE

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Priority:

25.05.1989 US 19890356974

(71)	Applicant: OPTICAL SHIELDS, INC.
	Menlo Park, CA 94025 (US)

(72)	Inventors:
	FERGASON, James, L. Atherton, CA 94025 (US) NING, Sun, C., Fan Cupertino, CA 95014 (US) BUCK, Jesse, David Redwood City, CA 94062 (US)

(74)	Representative: Crisp, David Norman
	D. YOUNG & CO. 21 New Fetter Lane London EC4A 1DA London EC4A 1DA (GB)

(54)	HIGH SPEED OPTICAL PROTECTION USING SMECTIC LIQUID CRYSTAL