U.S. Philips Corporation

Dirk J Broer

Rifat A Hikmet

Ingrid E Heynderickx

Shuji Eguchi

Johan George Kloosterboer

Grietje Neeltje Mol

Johannes C Mulkens

A molecularly oriented synthetic resin composition whose coefficient of linear thermal expansion in two mutually perpendicular directions, below the glass-transition temperature, is at least a factor of 3 smaller than in a third direction extending perpendicularly to the first two directions, is manufactured by curing a liquid-crystalline composition having a helicoidal order of molecules, so as to form a polymer network. The resins thus obtained are suitable for use as claddings on materials having a coefficient of thermal expansion which is smaller than that of most synthetic resins.

Molecularly oriented synthetic resin composition

A liquid-crystal display device having an improved picture quality is obtained by rendering the iso-contrast curves rotationally symmetrical. This is obtained by means of a double cell construction, in which two identical TN-cells are present between two parallel polarizers, which TN cells are arranged relative to each other in such a manner that the director at the front face of the second cell encloses an angle of 180.degree. with the director at the front face of the first cell. A polarizer is provided between both cells, the direction of polarization of said polarizer extending perpendicularly to the direction of polarization of the two other polarizers.

Liquid-crystal display device having rotationally symmetrical

A liquid-crystal display device having a twisted nematic liquid-crystalline material is provided with a layer of an optically anisotropic material to obtain a colourless display device which is rich in contrast. The optically anisotropic material is a synthetic resin composition comprising a polymer network having a helicoidal order manufactured from a curable liquid-crystalline composition having a chiral dopant.

Liquid-crystal display device

A liquid crystalline material in the form of an anisotropic gel comprising a polymerized liquid crystalline material and a low-molecular weight liquid crystalline material, can be used in a display cell, said polymerized material forming a permanently oriented network in the low-molecular weight liquid crystalline material.

Liquid crystalline material and display cell containing said material

The invention relates to a method of providing a surface layer on a substrate, which surface layer can bring about an inclined orientation of the molecules of the liquid crystalline layer applied to the surface layer at the interface between the surface layer and the liquid crystalline layer. The surface layer is manufactured from a liquid crystalline auxiliary layer in which the orientation of at least a part of the molecules is permanently fixed.

Method of providing a liquid crystalline auxiliary layer in a display

Glass capillaries having an internal diameter of a few micrometers are internally provided with a relatively thick polymer film by in-situ polymerisation of suitable monomers and/or oligomers in a solvent. The said polymer film is suitable as a stationary phase for liquid chromatography.

Method of manufacturing a separation column

Glass capillaries having an internal diameter of a few micrometers are internally provided with a relatively thick polymer film by in-situ polymerization of suitable monomers and/or oligomers in a solvent. The said polymer film is suitable as a stationary phase for liquid chromatography.

Growing community of inventors

Wilmington, DE, United States of America

Dirk J Broer