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US5699136A Expired / Lapsed US ⏱️ 0.0 years remaining

Negative uniaxial anisotropic element and method for manufacturing the same

Assignee: Fujifilm Holdings Corp
•
Filing: 1995-05-17
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Granted: 1997-12-16
•
Expires: 2015-05-17
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Abstract

Abstract The present invention provides an optically anisotropic element to be used for improvement of visual angle characteristics for display contrast and display color of TN type liquid crystal display element, and to a method for manufacturing the same. The optically anisotropic element has a liquid crystal display element, which comprises a liquid crystal cell, in which a twist nematic liquid crystal is squeezed between two electrode substrates and two polarizing elements disposed on both sides thereof, said optically anisotropic element being disposed between said liquid crystal cell and said polarizing element, whereby it has sheet-like structure and exhibits negative uniaxial property and is arranged in such manner that its optical axis is neither perpendicular nor in parallel to sheet surface, for example, it is inclined at an angle of 10° to 40° from a direction perpendicular to sheet surface. As the result, phase difference caused by the liquid crystal cell CE with respect to oblique incident light is compensated by phase difference of the optically anisotropic element RF, and a liquid crystal display element of high quality with no dependence on visual angle can be obtained.

Inventors

  • 👤 Kohei Arakawa
  • 👤 Yosuke Nishiura
  • 👤 Yoji Ito

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 22:20
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3083; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/13363; G02F1/133632

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 104 words
A liquid crystal display element, comprising an optically anisotropic element, in which a twist nematic liquid crystal is arranged between two electrode substrates and two polarizing elements disposed on both sides thereof, said optically anisotropic element being disposed between said twist nematic liquid crystal and said polarizing element, wherein said optically anisotropic element has sheet-like structure and a sheet surface, and exhibits negative uniaxial property, the optical axis of said anisotropic element is inclined at an angle of 10° to 40° from a direction perpendicular to the sheet surface, and said optically anisotropic element contains low molecular weight liquid crystal oriented in macromolecular matrix.
Claim 2
Dependent Claim 104 words
A liquid crystal display element, comprising an optically anisotropic element, in which a twist nematic liquid crystal is arranged between two electrode substrates and two polarizing elements disposed on both sides thereof, said optically anisotropic element being disposed between said twist nematic liquid crystal and said polarizing element, wherein said optically anisotropic element has sheet-like structure and a sheet surface, and exhibits negative uniaxial property, the optical axis of said anisotropic element is inclined at an angle of 10° to 40° from a direction perpendicular to the sheet surface, and said optically anisotropic element contains low molecular weight liquid crystal oriented in macromolecular matrix.
Claim 3
Dependent Claim 51 words
A liquid crystal display element according to claim 1, wherein orientation of said low molecular weight liquid crystal is fixed by one or more of cross-linking between said macromolecular matrix, cross-linking between said low molecular weight liquid crystals, or cross-linking between said macromolecular matrix and said low molecular weight liquid crystal.
Claim 4
Independent Claim 76 words
A method for manufacturing an optically anisotropic element, which has sheet-like structure and a sheet surface, exhibits negative uniaxial property and the optical axis of said anisotropic element is arranged neither perpendicularly nor in parallel to the sheet surface, wherein said anisotropic element is formed by dispersing low molecular weight liquid crystals in macromolecular matrix, and the optical axis of said anisotropic element is adjusted by applying electric field or magnetic field to said liquid crystals.
Claim 5
Independent Claim 76 words
A method for manufacturing an optically anisotropic element, which has sheet-like structure and a sheet surface, exhibits negative uniaxial property and the optical axis of said anisotropic element is arranged neither perpendicularly nor in parallel to the sheet surface, wherein said anisotropic element is formed by dispersing low molecular weight liquid crystals in macromolecular matrix, and the optical axis of said anisotropic element is adjusted by applying electric field or magnetic field to said liquid crystals.

References Cited (Backward Citations)

US5380459A Cited
JPH04113301A Cited
JPH05257013A Cited
US5375006A Cited
US5506706A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2000-12-15 2001-06-16 2001-12-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2004-12-15 2005-06-16 2005-12-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2008-12-15 2009-06-16 2009-12-16 $7700.00 Window Closed / Lapsed

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