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EP0506175A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Liquid crystal display device comprising an orientation layer

Assignee: Koninklijke Philips NV
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Filing: 1992-03-17
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Granted: —
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Expires: 2012-03-17
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Abstract

Abstract An orientation layer for a liquid crystal display device is formed from a mixture of at least one reactive liquid-crystalline material and at least one non-reactive liquid-crystalline material. The mixture is brought into contact with a surface of a mould having an orienting effect, as a result of which the molecules in the mixture are oriented. Subsequently, the reactive liquid-crystalline material is made to cure, thereby forming an oriented polymer network in which the non-reactive liquid-crystalline material is dispersed. The orientation layer thus manufactured is very suitable for use in an active display device.

Inventors

  • 👤 Rifat Ata Mustafa Hikmet

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 14:27
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 88 words
A method of manufacturing a liquid crystal display device comprising an orientation layer, said orientation layer being formed in contact with the surface of a mould, which mould is subsequently removed, characterized in that the surface of the mould contacting the orientation layer to be formed is flat and has an orienting effect, and in that the orientation layer is formed from a mixture of at least one reactive liquid-crystalline material and at least one non-reactive liquid-crystalline material, the reactive liquid-crystalline material being cured in the oriented state.
Claim 2
Dependent Claim 25 words
A method as claimed in Claim 1, characterized in that the surface of the mould having an orienting effect consists of a rubbed polymer layer.
Claim 3
Dependent Claim 23 words
A method as claimed in Claim 1, characterized in that the reactive liquid-crystalline material is made to cure by means of actinic radiation.
Claim 4
Dependent Claim 29 words
A method as claimed in Claim 3, characterized in that the reactive liquid-crystalline material is cured, thereby forming a polymer network in which the non-reactive liquid-crystalline material is dispersed.
Claim 5
Dependent Claim 33 words
A liquid crystal display device comprising an orientation layer and switchable liquid-crystalline material, characterized in that the orientation layer consists of an oriented polymer network in which a non-reactive liquid-crystalline material is dispersed.
Claim 6
Dependent Claim 30 words
A liquid crystal display device as claimed in Claim 5, characterized in that the non-reactive liquid-crystalline material in the orientation layer has the same composition as the switchable liquid-crystalline material.
Claim 7
Dependent Claim 27 words
A liquid crystal display device as claimed in Claim 5 or 6, characterized in that the orientation layer is provided on a substrate comprising electric switching elements.

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