EP0311339A2
Expired / Lapsed
EP
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Liquid crystal display
Assignee: Panasonic Holdings Corp
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Filing: 1988-10-04
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Granted: —
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Expires: 2008-10-04
Abstract
Abstract A liquid crystal display comprises a liquid crystal panel having a liquid crystal layer disposed between electrode layers, polarizers disposed at both sides of the panel, and a solid birefringent (7a, 7b) film having the maximum refractive index direction varying with its depth and disposed at at least one side of the liquid crystal panel between the polarizers. The solid birefringent film compensates the dependence of the polarization characteristic on wave length, thus being capable of obtaining either a monochrome display or a display having an extremely low coloration.
Inventors
- 👤 Isao 19-21 1-Chome Ota
- 👤 Katsuhiko Kumagawa
- 👤 Shingo 13-13 2-Chome Fujita
- 👤 Hiroshi Yamazoe
- 👤 Shigeru 7-4-308 4-Chome Yoshida
- 👤 Toshio Tatsumichi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 16:42
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/13363; G02F1/133636; G02F1/137; G02F1/139; G02F1/1393; G02F1/1396; G02F1/1397; G02F1/141
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
76 words
A liquid crystal display comprising: a liquid crystal panel having a liquid crystal layer disposed between electrode layers; two polarizers between which said liquid crystal panel is disposed; and optical compensation means disposed at at least one side of said liquid crystal panel between said two polarizers for compensating a dependence of state of polarization on wave length, said optical compensation means being made of a solid film whose maximum refractive index direction varies with depth.
Claim 2
Dependent Claim
76 words
A liquid crystal display comprising: a liquid crystal panel having a liquid crystal layer disposed between electrode layers; two polarizers between which said liquid crystal panel is disposed; and optical compensation means disposed at at least one side of said liquid crystal panel between said two polarizers for compensating a dependence of state of polarization on wave length, said optical compensation means being made of a solid film whose maximum refractive index direction varies with depth.
Claim 3
Dependent Claim
18 words
A liquid crystal display as claimed in claim 1, wherein said liquid crystal layer has a twisted structure.
Claim 4
Dependent Claim
33 words
A liquid crystal display as claimed in claim 1, wherein said liquid crystal layer is of a nematic liquid crystal having a twisted structure whose twist angle ranges from 180 to 360 deg.
Claim 5
Dependent Claim
21 words
A liquid crystal display as claimed in claim 1, wherein said liquid crystal panel is subjected to a passive matrix addressing.
Claim 6
Dependent Claim
32 words
A liquid crystal display as claimed in claim 1, having a transmission type structure equipped with at least one of a back light source and means for introducing the outdoor daylight thereinto.
Claim 7
Dependent Claim
18 words
A liquid crystal display as claimed in claim 1, having a reflection type structure equipped with a reflector.
Claim 8
Dependent Claim
91 words
A liquid crystal display comprising: a liquid crystal panel having a liquid crystal layer disposed between electrode layers; two polarizers between which said liquid crystal panel is disposed; and optical compensation means disposed at at least one side of said liquid crystal panel between said two polarizers for compensating a dependence of state of polarization on wave length, said optical compensation means being made of laminated solid films at least one of which is arranged in a direction such that the maximum refractive index thereof differs from those of the remainder.
Claim 9
Dependent Claim
91 words
A liquid crystal display comprising: a liquid crystal panel having a liquid crystal layer disposed between electrode layers; two polarizers between which said liquid crystal panel is disposed; and optical compensation means disposed at at least one side of said liquid crystal panel between said two polarizers for compensating a dependence of state of polarization on wave length, said optical compensation means being made of laminated solid films at least one of which is arranged in a direction such that the maximum refractive index thereof differs from those of the remainder.
Claim 10
Dependent Claim
18 words
A liquid crystal display as claimed in claim 7, wherein said liquid crystal layer has a twisted structure.
Claim 11
Dependent Claim
33 words
A liquid crystal display as claimed in claim 7, wherein said liquid crystal layer is of a nematic liquid crystal having the twisted structure whose twist angle ranges from 180 to 360 deg.
Claim 12
Dependent Claim
22 words
A liquid crystal display as claimed in claim 7, wherein said optical compensation means is made of uniaxially elongated high polymer films.
Claim 13
Dependent Claim
22 words
A liquid crystal display as claimed in claim 7, wherein said optical compensation means is made of multiaxially elongated high polymer films.
Claim 14
Dependent Claim
30 words
A liquid crystal display as claimed in claim 7, wherein said optical compensation means includes at least one of polyvinylalcohol, polyethersulfonate, polyester, polycarbonate, cellulose acetate, liquid crystal polymer and cellophane.
Claim 15
Dependent Claim
21 words
A liquid crystal display as claimed in claim 7, wherein said liquid crystal panel is subjected to a passive matrix addressing.
Claim 16
Dependent Claim
32 words
A liquid crystal display as claimed in claim 7, having a transmission type structure equipped with at least one of a back light source and means for introducing the outdoor daylight thereinto.
Claim 17
Dependent Claim
18 words
A liquid crystal display as claimed in claim 7, having a reflection type structure equipped with a reflector.
Claim 18
Dependent Claim
81 words
A liquid crystal display comprising: a liquid crystal panel having a liquid crystal layer disposed between electrode layers; two polarizers between which said liquid crystal panel is disposed; and optical compensation means disposed at at least one side of said liquid crystal panel between said two polarizers for compensating a dependence of state of polarization on wave length, said optical compensation means being made of a laminated solid film whose maximum refractive index direction is twisted in one direction with depth.
Claim 19
Dependent Claim
81 words
A liquid crystal display comprising: a liquid crystal panel having a liquid crystal layer disposed between electrode layers; two polarizers between which said liquid crystal panel is disposed; and optical compensation means disposed at at least one side of said liquid crystal panel between said two polarizers for compensating a dependence of state of polarization on wave length, said optical compensation means being made of a laminated solid film whose maximum refractive index direction is twisted in one direction with depth.
Claim 20
Dependent Claim
18 words
A liquid crystal display as claimed in claim 16, wherein said liquid crystal layer has a twisted structure.
Claim 21
Dependent Claim
33 words
A liquid crystal display as claimed in claim 16, wherein said liquid crystal layer is of a nematic liquid crystal having a twisted structure whose twist angle ranges from 180 to 360 deg.
Claim 22
Dependent Claim
22 words
A liquid crystal display as claimed in claim 16, wherein said optical compensation means is made of uniaxially elongated high polymer films.
Claim 23
Dependent Claim
22 words
A liquid crystal display as claimed in claim 16, wherein said optical compensation means is made of multiaxially elongated high polymer films.
Claim 24
Dependent Claim
30 words
A liquid crystal display as claimed in claim 16, wherein said optical compensation means includes at least one of polyvinylalcohol, polyethersulfonate, polyester, polycarbonate, cellulose acetate, liquid crystal polymer and cellophane.
Claim 25
Dependent Claim
21 words
A liquid crystal display as claimed in claim 16, wherein said liquid crystal panel is subjected to a passive matrix addressing.
Claim 26
Dependent Claim
32 words
A liquid crystal display as claimed in claim 16, having a transmission type structure equipped with at least one of a back light source and means for introducing the outdoor daylight thereinto.
Claim 27
Dependent Claim
18 words
A liquid crystal display as claimed in claim 16, having a reflection type structure equipped with a reflector.
Claim 28
Dependent Claim
57 words
A liquid crystal display comprising: a liquid crystal panel having a liquid crystal layer disposed between electrode layers; two polarizers disposed at both sides of said liquid crystal panel; and optical compensation means disposed at each side of said liquid crystal panel between said two polarizers for compensating a dependence of state of polarization on wave length.
Claim 29
Dependent Claim
57 words
A liquid crystal display comprising: a liquid crystal panel having a liquid crystal layer disposed between electrode layers; two polarizers disposed at both sides of said liquid crystal panel; and optical compensation means disposed at each side of said liquid crystal panel between said two polarizers for compensating a dependence of state of polarization on wave length.
Claim 30
Dependent Claim
18 words
A liquid crystal display as claimed in claim 25, wherein said liquid crystal layer has a twisted structure.
Claim 31
Dependent Claim
33 words
A liquid crystal display as claimed in claim 25, wherein said liquid crystal layer is of a nematic liquid crystal having a twisted structure whose twist angle ranges from 180 to 360 deg.
Claim 32
Dependent Claim
22 words
A liquid crystal display as claimed in claim 25, wherein said optical compensation means is made of uniaxially elongated high polymer films.
Claim 33
Dependent Claim
22 words
A liquid crystal display as claimed in claim 25, wherein said optical compensation means is made of multiaxially elongated high polymer films.
Claim 34
Dependent Claim
30 words
A liquid crystal display as claimed in claim 25, wherein said optical compensation means includes at least one of polyvinylalcohol, polyethersulfonate, polyester, polycarbonate, cellulose acetate, liquid crystal polymer and cellophane.
Claim 35
Dependent Claim
21 words
A liquid crystal display as claimed in claim 25, wherein said liquid crystal panel is subjected to a passive matrix addressing.
Claim 36
Dependent Claim
32 words
A liquid crystal display as claimed in claim 25, having a transmission type structure equipped with at least one of a back light source and means for introducing the outdoor daylight thereinto.
Claim 37
Dependent Claim
18 words
A liquid crystal display as claimed in claim 25, having a reflection type structure equipped with a reflector.
References Cited (Backward Citations)
No citation records indexed.
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