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EP0552508A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Display device comprising liquid crystalline material

Assignee: Koninklijke Philips NV
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Filing: 1992-12-03
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Granted: —
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Expires: 2012-12-03
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Abstract

Abstract A display device comprising a display cell consisting of a substrate which is formed by two oppositely located plates 1,2 whose facing sides are provided with electrode layers 4,5 to which an orientation layer 7 is applied and a sealing material 3 which is provided between the end portions of the plates, a liquid crystalline material 6 being filled into the space between the plates and the sealing material. In said display device, the liquid crystalline material is locally formed into a polymer network in accordance with a desired pattern. By virtue thereof, the desired pattern of picture elements can be designed with a substantial degree of freedom because it is possible to locally raise the switching threshold of the liquid crystalline material if image formation is not desired at locations where electrodes or conductor patterns cross each other.

Inventors

  • 👤 Rifat Ata Mustafa Hikmet

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 13:47
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1334; G09; G09F; G09F9/00; G09F9/30; G09F9/35; C; C09; C09K; C09K19/00; C09K19/52; C09K19/54; C09K19/542; C09K19/544; C09K2019/546; G02F1/13345

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 96 words
A display device with a display cell which comprises a substrate which is formed by two oppositely located plates whose facing sides are provided with electrode layers to which a orientation layer is applied ad a sealing material which is provided between the end portions of the plates, a liquid crystalline material being filled into the space between the plates and the sealing material, characterized in that the liquid crystalline material comprises molecules having reactive groups and in that the liquid crystalline material is locally formed into a polymer network in accordance with a desired pattern.
Claim 2
Dependent Claim 27 words
A display device as claimed in Claim 1, characterized in that the liquid crystalline material is immobilized in a oriented state at the location of the network.
Claim 3
Dependent Claim 42 words
A display device as claimed in Claim 1 or 2, characterized in that one of the plates is provided with patterned electrodes for driving picture elements in the display cell, and in that the other plate is provided with a continuous counterelectrode.
Claim 4
Independent Claim 110 words
A method of manufacturing a display device with a display cell which comprises a substrate which is formed by two oppositely located plates whose facing sides are provided with electrode layers to which a orientation layer is applied and a sealing material which is provided between the end portions of the plates, a liquid crystalline material being filled into the space between the plates and the sealing material, characterized in that a liquid crystalline material comprising reactive groups is selected, and in that the liquid crystalline material is locally formed into a polymer network in accordance with a desired pattern by means of exposure to actinic radiation via a mask.

References Cited (Backward Citations)

DE2841338A1 Cited
EP0275999A2 Cited
EP0423881A1 Cited

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