The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 06, 2001
Filed:
Nov. 25, 1997
Sven T. Lagerwall, Göteborg, SE;
Anatoli A. Muravski, Minsk, BY;
Sergei Ye Yakovenko, Minsk, BY;
Viktor A. Konovalov, Minsk, BY;
Anatoli A. Minko, Minsk, BY;
Valeri P. Tsarev, late of Minsk, BY;
EMT AG, Stafa, CH;
Abstract
The invention relates to an essentially pressure-insensitive liquid crystal cell. Electrode-equipped (5, 6) plates (,) are arranged at a predetermined distance from each other and define a liquid crystal layer of a thickness d. At least a first (1) of the plates is transparent and has a thickness b not exceeding 1 mm, and a modulus of elasticity E. Spacers (,) fixed in the cavity and having a height h are distributed with a spacing L and have substantially the same modulus of elasticity E as said first plate. The spacers (,) have a width not exceeding 50 &mgr;m, at least in one direction. The degree of the surface coverage s by the supporting areas of the spacers (,) on said first plate (,) exceeds or is equal to a minimum value which is dependent on the type of liquid crystal. L is so selected in dependance on current values of d and b that, when applying a pressure P on the first plate (,), a maximum relative deflection &Dgr;d/d, caused by the pressure P on the first plate between the spacers satisfies condition (A): &Dgr;d/d=PL,/4Eb,d≦G, where G is equal to the value of expression (B), representing a relative compression of the spacers caused by the same pressure P, for a case where the degree of surface coverage s assumes the above-mentioned minimum value (B): &Dgr;h/h=P/sE.