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US4850683A Expired / Lapsed US ⏱️ 0.0 years remaining

Liquid crystal display element and process for producing the same

Assignee: Fujifilm Holdings Corp
•
Filing: 1987-12-08
•
Granted: 1989-07-25
•
Expires: 2007-12-08
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Abstract

Abstract A liquid crystal display element and a process for producing the same is disclosed. The liquid crystal display is composed of liquid crystals filled in a matrix comprising at least two high polymers having neither mutual compatibility nor substantial compatibility with the liquid crystals, said matrix being sandwiched between two transparent electrode bases. The display element is produced by applying a solution of the liquid crystals and the aforesaid high polymers in a common solvent onto a transparent electrode base, drying the solution to cause phase separation, and laminating another transparent electrode base on the dry film. The display element provides a wide display area with bright contrast and achieves orientation of liquid crystals with a low applied voltage.

Inventors

  • 👤 Hideo Kawaguchi
  • 👤 Takashi Takayanagi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 16:24
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/54; C09K19/542; C09K19/544

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 74 words
A process for producing a liquid crystal display element, which comprises dissolving liquid crystals and at least two mutually incompatible high polymers, each polymer being substantially incompatible with the liquid crystals, in a solvent capable of dissolving both the liquid crystals and the high polymers to form a uniform solution, applying the solution onto a transparent electrode base, followed by drying to form a film, and laminating another transparent electrode base on the film.
Claim 2
Dependent Claim 74 words
A process for producing a liquid crystal display element, which comprises dissolving liquid crystals and at least two mutually incompatible high polymers, each polymer being substantially incompatible with the liquid crystals, in a solvent capable of dissolving both the liquid crystals and the high polymers to form a uniform solution, applying the solution onto a transparent electrode base, followed by drying to form a film, and laminating another transparent electrode base on the film.
Claim 3
Dependent Claim 19 words
A process as claimed in claim 1, wherein said liquid crystals are nematic liquid crystals or smectic liquid crystals.
Claim 4
Dependent Claim 32 words
A process as claimed in claim 1, wherein the weight ratio of the liquid crystals to the total high polymers in the solution is in the ranges of from 1:1 to 1:0.25.
Claim 5
Dependent Claim 22 words
A process as claimed in claim 1, wherein said solution is applied to a dry thickness of from 2 to 30 μm.
Claim 6
Dependent Claim 22 words
A process as claimed in claim 1, wherein said solution is applied to a dry thickness of from 3 to 20 μm.

References Cited (Backward Citations)

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JPS546883A Cited
DD133004A1 Cited
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JPS54126558A Cited
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JPH06343993A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1992-07-24 1993-01-23 1993-07-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1996-07-24 1997-01-23 1997-07-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2000-07-24 2001-01-23 2001-07-25 $7700.00 Window Closed / Lapsed

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