EP0315484A2
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EP
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Liquid crystal display device
Assignee: Sharp Corp
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Filing: 1988-11-04
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Granted: —
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Expires: 2008-11-04
Abstract
Abstract A liquid crystal display device which comprises first and second electrode substrates spaced a predetermined distance from each other, a nematic liquid crystal layer added with an optically active material and having a positive dielectric anisotropy, which layer is sandwiched between the first and second electrode substrates such that the liquid crystal molecules exhibit a helical structure in which they are twisted in a predetermined twist angle in a direction across the thickness of the liquid crystal layer, a light detecting element positioned on one side of the first electrode substrate remote from the liquid crystal layer, a polarizing element positioned on one side of the second electrode substrate remote from the liquid crystal layer, and a film-like sheet having a birefringence and disposed between the light detecting element and the first electrode substrate, and/or between the polarizing element and the second electrode substrate.
Inventors
- 👤 Shyuichi Kozaki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 07:02
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/137; G02F1/139; G02F1/1396; G02F1/1397; C; C09; C09K; C09K19/00; C09K19/04; C09K19/42; C09K19/46; G02F1/1333; G02F1/1335; G02F1/13363; G02F2202/00; G02F2202/40; G02F2413/00; G02F2413/01; G02F2413/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
137 words
A liquid crystal display device which comprises: first and second electrode substrates spaced a predetermined distance from each other; a nematic liquid crystal layer added with an optically active material and having a positive dielectric anisotropy, said nematic liquid crystal layer being sandwiched between the first and second electrode substrates such that the liquid crystal molecules exhibit a helical structure in which they are twisted in a predetermined twist angle in a direction across the thickness of the liquid crystal layer; a light detecting element positioned on one side of the first electrode substrate remote from the liquid crystal layer; a polarizing element positioned on one side of the second electrode substrate remote from the liquid crystal layer; and a film-like sheet having a birefringence and disposed between the light detecting element and the first electrode substrate.
Claim 2
Dependent Claim
137 words
A liquid crystal display device which comprises: first and second electrode substrates spaced a predetermined distance from each other; a nematic liquid crystal layer added with an optically active material and having a positive dielectric anisotropy, said nematic liquid crystal layer being sandwiched between the first and second electrode substrates such that the liquid crystal molecules exhibit a helical structure in which they are twisted in a predetermined twist angle in a direction across the thickness of the liquid crystal layer; a light detecting element positioned on one side of the first electrode substrate remote from the liquid crystal layer; a polarizing element positioned on one side of the second electrode substrate remote from the liquid crystal layer; and a film-like sheet having a birefringence and disposed between the light detecting element and the first electrode substrate.
Claim 3
Dependent Claim
136 words
A liquid crystal display device which comprises: first and second electrode substrates spaced a predetermined distance from each other; a nematic liquid crystal layer added with an optically active material and having a positive dielectric anisotropy, said nematic liquid crystal layer being sandwiched between the first and second electrode substrates such that the liquid crystal molecules exhibit a helical structure in which they are twisted in a predetermined twist angle in a direction across the thickness of the liquid crystal layer; a light detecting element positioned on one side of the first electrode substrate remote from the liquid crystal layer; a polarizing element positioned on one side of the second electrode substrate remote from the liquid crystal layer; and a film-like sheet having a birefringence and disposed between the polarizing element and the second electrode substrate.
Claim 4
Dependent Claim
136 words
A liquid crystal display device which comprises: first and second electrode substrates spaced a predetermined distance from each other; a nematic liquid crystal layer added with an optically active material and having a positive dielectric anisotropy, said nematic liquid crystal layer being sandwiched between the first and second electrode substrates such that the liquid crystal molecules exhibit a helical structure in which they are twisted in a predetermined twist angle in a direction across the thickness of the liquid crystal layer; a light detecting element positioned on one side of the first electrode substrate remote from the liquid crystal layer; a polarizing element positioned on one side of the second electrode substrate remote from the liquid crystal layer; and a film-like sheet having a birefringence and disposed between the polarizing element and the second electrode substrate.
Claim 5
Dependent Claim
156 words
A liquid crystal display device which comprises: first and second electrode substrates spaced a predetermined distance from each other; a nematic liquid crystal layer added with an optically active material and having a positive dielectric anisotropy, said nematic liquid crystal layer being sandwiched between the first and second electrode substrates such that the liquid crystal molecules exhibit a helical structure in which they are twisted in a predetermined twist angle in a direction across the thickness of the liquid crystal layer; a light detecting element positioned on one side of the first electrode substrate remote from the liquid crystal layer; a polarizing element positioned on one side of the second electrode substrate remote from the liquid crystal layer; a first film-like sheet having a birefringence and disposed between the light detecting element and the first electrode substrate; and a second film-like sheet having a birefringence and disposed between the polarizing element and the second electrode substrate.
Claim 6
Dependent Claim
156 words
A liquid crystal display device which comprises: first and second electrode substrates spaced a predetermined distance from each other; a nematic liquid crystal layer added with an optically active material and having a positive dielectric anisotropy, said nematic liquid crystal layer being sandwiched between the first and second electrode substrates such that the liquid crystal molecules exhibit a helical structure in which they are twisted in a predetermined twist angle in a direction across the thickness of the liquid crystal layer; a light detecting element positioned on one side of the first electrode substrate remote from the liquid crystal layer; a polarizing element positioned on one side of the second electrode substrate remote from the liquid crystal layer; a first film-like sheet having a birefringence and disposed between the light detecting element and the first electrode substrate; and a second film-like sheet having a birefringence and disposed between the polarizing element and the second electrode substrate.
Claim 7
Dependent Claim
60 words
A liquid crystal display device including a liquid crystal cell comprising a liquid crystal material disposed between a pair of parallel, opposed substrates; and at least one polarizing plate arranged to transmit light passing to or from the liquid crystal cell; wherein there is further provided a planar birefringent element disposed between the liquid crystal cell and the polarizing plate.
Claim 8
Dependent Claim
60 words
A liquid crystal display device including a liquid crystal cell comprising a liquid crystal material disposed between a pair of parallel, opposed substrates; and at least one polarizing plate arranged to transmit light passing to or from the liquid crystal cell; wherein there is further provided a planar birefringent element disposed between the liquid crystal cell and the polarizing plate.
References Cited (Backward Citations)
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