Patent EP0367288A2 successfully refreshed from Google Patents.
EP0367288A2
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EP
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Liquid crystal display
Assignee: Fujifilm Holdings Corp
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Filing: 1989-11-03
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Granted: —
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Expires: 2009-11-03
Abstract
Abstract A liquid crystal display comprising a liquid crystal cell and a polarizing sheet is disclosed, in which (A) at least one film having light transmission properties, said film (A) having at least one optic axis at an angle of not more than 45 DEG with the normal thereof or satisfying the relationship: eta TH - ( eta MD + eta TD)/2 > 0 wherein eta TH is a refractive index inthe normal direction; eta MD is a refractive index in the machine direction; and eta TD is a refractive index in the transverse direction, and (B) at least one uniaxially stretched film of a polymer having a positive intrinsic birefringence and light transmission properties are inserted between the liquid crystal cell and the polarizing sheet. Viewing angle dependence of retardation of the display can be eliminated, and the display has markedly widended viewing angle.
Inventors
- 👤 Kohei Arakawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 13:13
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/13363; G02F1/133634; G02F2413/00; G02F2413/13; G02F2413/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
A liquid crystal display comprising a liquid crystal cell and a polarizing sheet having inserted therebetween (A) at least one film having light transmission properties, said film (A) having at least one optic axis at an angle of not more than 45° with the normal thereof or satisfying the relationship: η TH - (η MD + η TD )/2 > 0 wherein η TH is a refractive index in the normal direction; η MD is a refractive index in the machine direction; and η TD is a refractive index in the transverse direction, and (B) at least one uniaxially stretched film of a polymer having a positive intrinsic birefringence and light transmission properties.
Claim 2
Dependent Claim
113 words
A liquid crystal display comprising a liquid crystal cell and a polarizing sheet having inserted therebetween (A) at least one film having light transmission properties, said film (A) having at least one optic axis at an angle of not more than 45° with the normal thereof or satisfying the relationship: η TH - (η MD + η TD )/2 > 0 wherein η TH is a refractive index in the normal direction; η MD is a refractive index in the machine direction; and η TD is a refractive index in the transverse direction, and (B) at least one uniaxially stretched film of a polymer having a positive intrinsic birefringence and light transmission properties.
Claim 3
Dependent Claim
31 words
A liquid crystal display as claimed in Claim 1, wherein said film (A) is a film in which molecules having a negative intrinsic birefringence are substantially orientated in the planar direction.
Claim 4
Dependent Claim
26 words
A liquid crystal display as claimed in Claim 1, wherein said film (A) is a biaxially orientated film of a polymer having a negative intrinsic birefringence.
Claim 5
Dependent Claim
41 words
A liquid crystal display as claimed in Claim 1, wherein said film (A) is composed of two uniaxially orientated films of a polymer having a negative intrinsic birefringence with the directions of orientation of the two films being at right angles.
Claim 6
Dependent Claim
25 words
A liquid crystal display as claimed in Claim 1, wherein said film (A) is a solvent-cast film of a polymer having a negative intrinsic birefringence.
Claim 7
Dependent Claim
32 words
A liquid crystal display as claimed in Claim 1, wherein said film (A) is a film in which liquid crystal molecules having a negative intrinsic birefringence are orientated in the planar direction.
Claim 8
Dependent Claim
27 words
A liquid crystal display as claimed in Claim 1, wherein said film (A) is a film obtained from one of styrene polymers or one of acrylate polymers.
Claim 9
Dependent Claim
32 words
A liquid crystal display as claimed in Claim 1, wherein said film (A) is a film in which molecules having a positive intrinsic birefringence are substantially orientated in the normal direction thereof.
Claim 10
Dependent Claim
34 words
A liquid crystal display as claimed in Claim 1, wherein said film (A) is a film in which liquid crystal molecules having a positive intrinsic birefringence are substantially orientated in the normal direction thereof.
Claim 11
Dependent Claim
36 words
A liquid crystal display as claimed in Claim 1, wherein at least one of films (A) is previously provided as a protective film on the polarizing sheet on the side facing to the liquid crystal cell.
References Cited (Backward Citations)
No citation records indexed.
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