Patent US5296952A successfully refreshed from Google Patents.
US5296952A
Expired / Lapsed
US
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Double-layer liquid crystal device having a three dimensional network structure
Assignee: DIC Corp
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Filing: 1993-08-02
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Granted: 1994-03-22
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Expires: 2013-08-02
Abstract
Abstract A light scattering liquid crystal device having a double structure composed of (1) a first display panel of light scattering type which comprises a pair of transparent substrates each having a transparent electrode layer and a light controlling layer formed therebetween, said light controlling layer containing a liquid crystal material and a transparent solid substance and (2) a second display panel comprising a pair of transparent substrates each having an electrode layer and a liquid crystal material filled therebetween, selected from a guest-host type liquid crystal display panel containing a dichroic dye and a twisted or super-twisted nematic liquid crystal display panel having a pair of polarizers. The device achieves brightness and high contrast.
Inventors
- 👤 Haruyoshi Takatsu
- 👤 Kiyofumi Takeuchi
- 👤 Yasuo Umezu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:09
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1347; G02F1/13476; G02F1/1334; G02F1/1335; G02F1/133528; G02F1/133533; G02F1/137; G02F1/13725; G02F1/139; G02F1/1396; G02F2203/00; G02F2203/01; G02F2203/02; G02F2203/03
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
79 words
A light scattering liquid crystal device having a double structure composed of (1) a first display panel of light scattering type which comprises a pair of transparent substrates each having a transparent electrode layer and a light controlling layer formed therebetween, said light controlling layer containing a liquid crystal material and a transparent solid substance and (2) a second display panel comprising a pair of transparent substrates each having an electrode layer and a liquid crystal material filled therebetween.
Claim 2
Dependent Claim
79 words
A light scattering liquid crystal device having a double structure composed of (1) a first display panel of light scattering type which comprises a pair of transparent substrates each having a transparent electrode layer and a light controlling layer formed therebetween, said light controlling layer containing a liquid crystal material and a transparent solid substance and (2) a second display panel comprising a pair of transparent substrates each having an electrode layer and a liquid crystal material filled therebetween.
Claim 3
Dependent Claim
28 words
A light scattering liquid crystal device as claimed in claim 1, wherein said second display panel is a guest-host type liquid crystal display panel containing a dichroic dye.
Claim 4
Dependent Claim
33 words
A light scattering liquid crystal device as claimed in claim 2, wherein said dichroic dye is present in an amount of from 0.01 to 10% by weight based on the liquid crystal material.
Claim 5
Dependent Claim
29 words
A light scattering liquid crystal device as claimed in claim 1, wherein said second display panel is a twisted nematic liquid crystal display panel having a pair of polarizers.
Claim 6
Dependent Claim
22 words
A light scattering liquid crystal device as claimed in claim 4, wherein at least one of said polarizers is a color polarizer.
Claim 7
Dependent Claim
19 words
A light scattering liquid crystal device as claimed in claim 4, wherein said polarizers are perpendicular to each other.
Claim 8
Dependent Claim
19 words
A light scattering liquid crystal device as claimed in claim 4, wherein said polarizers are parallel to each other.
Claim 9
Dependent Claim
20 words
A light scattering liquid crystal device as claimed in claim 1, wherein said second display panel has a color filter.
Claim 10
Dependent Claim
20 words
A light scattering liquid crystal device as claimed in claim 2, wherein said second display panel has a color filter.
Claim 11
Dependent Claim
20 words
A light scattering liquid crystal device as claimed in claim 4, wherein said second display panel has a color filter.
Claim 12
Dependent Claim
29 words
A light scattering liquid crystal device as claimed in claim 1, wherein said second display panel has a reflective plate on the side opposite to said first display panel.
Claim 13
Dependent Claim
29 words
A light scattering liquid crystal device as claimed in claim 2, wherein said second display panel has a reflective plate on the side opposite to said first display panel.
Claim 14
Dependent Claim
29 words
A light scattering liquid crystal device as claimed in claim 4, wherein said second display panel has a reflective plate on the side opposite to said first display panel.
Claim 15
Dependent Claim
40 words
A light scattering liquid crystal device as claimed in claim 1, wherein said light controlling layer of the first panel comprises a continuous phase of the liquid crystal material in which a transparent solid substance forms a three-dimensional network structure.
Claim 16
Dependent Claim
40 words
A light scattering liquid crystal device as claimed in claim 2, wherein said light controlling layer of the first panel comprises a continuous phase of the liquid crystal material in which a transparent solid substance forms a three-dimensional network structure.
Claim 17
Dependent Claim
40 words
A light scattering liquid crystal device as claimed in claim 4, wherein said light controlling layer of the first panel comprises a continuous phase of the liquid crystal material in which a transparent solid substance forms a three-dimensional network structure.
Claim 18
Dependent Claim
31 words
A light scattering liquid crystal device as claimed in claim 1, wherein said light controlling layer of the first panel contains at least 60% by weight of the liquid crystal material.
Claim 19
Dependent Claim
31 words
A light scattering liquid crystal device as claimed in claim 2, wherein said light controlling layer of the first panel contains at least 60% by weight of the liquid crystal material.
Claim 20
Dependent Claim
31 words
A light scattering liquid crystal device as claimed in claim 4, wherein said light controlling layer of the first panel contains at least 60% by weight of the liquid crystal material.
Claim 21
Dependent Claim
25 words
A light scattering liquid crystal device as claimed in claim 19, wherein said light controlling layer has a thickness of from 2 to 30 μm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-21 | 1997-09-20 | 1998-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-21 | 2001-09-20 | 2002-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-21 | 2005-09-20 | 2006-03-22 | $7700.00 | Window Closed / Lapsed |