§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US5883685A Expired / Lapsed US ⏱️ 0.0 years remaining

Compensating film for a liquid crystal display and an OCB mode liquid crystal display incorporating the compensating film

Assignee: Eneos Corp
•
Filing: 1996-05-27
•
Granted: 1999-03-16
•
Expires: 2016-05-27
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract As a compensator for use in an OCB mode liquid crystal display there is provided a compensating film capable of making color compensation and attaining such a viewing angle expansion as has not been attainable heretofore. A compensating film for a liquid crystal display, constituted by at least one layer of a compensating film to be used in an OCB mode liquid crystal display, the compensating film being formed by a discotic liquid crystalline material having a fixed orientation form of a discotic liquid crystal, the compensating film being disposed between a driving liquid crystal cell and a pair of upper and lower polarizing plates, and the orientation form being a hybrid orientation in which the angle between discotic liquid crystal directors near the upper interface of the film and the film plane and the angle between discotic liquid crystal directors near the lower interface of the film and film plane are different from each other.

Inventors

  • 👤 Hitoshi Mazaki
  • 👤 Yasushi Sato
  • 👤 Takehiro Toyooka

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 17:40
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/13363; G02F1/133632; C; C09; C09K; C09K19/00; C09K19/02; C09K19/0216; G02F1/137; G02F1/139; G02F1/1393; G02F1/1395; G02F2413/00; G02F2413/10; G02F2413/105

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 90 words
A compensating element comprising a substrate not having an alignment film and a compensating film, said compensating film being a discotic liquid crystalline material havina a fixed orientation form of a discotic liquid crystal, said compensating film being disposed between a drivina liquid crystal cell and a pair of upper and lower polarizing plates, wherein said fixed orientation is a hybrid orientation in which the angle between the discotic liquid crystal directors near the upper interface of the film is different from that near the lower interface of the film.
Claim 2
Dependent Claim 90 words
A compensating element comprising a substrate not having an alignment film and a compensating film, said compensating film being a discotic liquid crystalline material havina a fixed orientation form of a discotic liquid crystal, said compensating film being disposed between a drivina liquid crystal cell and a pair of upper and lower polarizing plates, wherein said fixed orientation is a hybrid orientation in which the angle between the discotic liquid crystal directors near the upper interface of the film is different from that near the lower interface of the film.
Claim 3
Dependent Claim 70 words
The compensating element as set forth in claim 1 wherein said hybrid orientation of said compensating film is such that on one side of the film discotic liquid crystal directors are at an angle of between 60° and 90° relative to the film plane, while on the other side of the film, discotic liquid crystal directors are at an angle of between 0° and 50° relative to the film plane.
Claim 4
Dependent Claim 41 words
The compensating element of claim 1 wherein the substrate not having an alignment film is glass or a plastic selected from the group consisting of polymethacylate, polystyrene, polycarbonate, polyether sulfone, polyphenylene sulfide, polycrylate, amorphous polyolefin, triacetyl cellulose and epoxy resin films.
Claim 5
Dependent Claim 21 words
The compensating element of claim 1 wherein the substrate not having an alignment film is a retardation film or polarizing film.
Claim 6
Dependent Claim 46 words
The compensating element of claim 1 wherein the substrate not having an alignment film and the compensating film are affixed to each other through an adhesive or pressure sensitive adhesive prepared from acrylic resin, epoxy resin, ethylenevinyl acetate copolymer, rubber, urethane resin or a mixture thereof.
Claim 7
Dependent Claim 13 words
An OCB mode liquid crystal display including said compensating element of claim 1.

References Cited (Backward Citations)

US4430650A Cited
US5184237A Cited
US5568290A Cited
JPH0850206A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2002-03-15 2002-09-14 2003-03-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2006-03-15 2006-09-14 2007-03-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2010-03-15 2010-09-14 2011-03-16 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag