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:
Apr. 20, 1993
Filed:
Mar. 26, 1992
Rifat A Hikmet, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A light-scattering element comprising a liquid-crystal material which is dispersed in a matrix of a transparent polymer material is manufactured by mixing at least one polymerizable liquid-crystal material and at least one non-reactive liquid-crystal material. The mixture is provided between two substrates 1 and 2 in the form of a thin layer 5, rubbed polymer layers 3 and 4 being present on the side of the substrates where the mixture is to be provided, as a result of which the molecules in the mixture are oriented. The reactive material is made to cure by means of actinic radiation thereby forming a polymer network in which the non-polymerizable material is present as a continuous phase. The difference between one of the refractive indices of the cured material and the corresponding refractive index of the non-polymerizable liquid-crystal material is less than 0.10, as a result of which the light-scattering element forms a simple polarizer.