Patent US4963448A successfully refreshed from Google Patents.
US4963448A
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US
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Photorecording element and liquid crystal cell comprising the same
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1988-08-31
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Granted: 1990-10-16
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Expires: 2008-08-31
Abstract
Abstract A photorecording element is disclosed which consists of a transparent substrate, a molecular layer of an organic compound with an ability to change structure reversibly by virtue of light and disposed in direct contact with the transparent substrate, and a layer of liquid crystals disposed in direct contact with the molecular layer. A liquid crystal cell comprising the photorecording element is also disclosed. A modification having fine deformations on the surface of the transparent substrate and a modification having a dichroic dye contained in the layer of liquid crystals are embraced by the present invention.
Inventors
- 👤 Kunihiro Ichimura
- 👤 Yasuzo Suzuki
- 👤 Takahiro Seki
- 👤 Masako Sakuragi
- 👤 Takashi Tamaki
- 👤 Akira Hosoki
- 👤 Koso Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:35
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133362; C; C09; C09K; C09K19/00; C09K19/52; C09K19/60; C09K9/00; C09K9/02; G02F1/1337; G02F1/133711; G02F1/13378; G02F1/133788; G02F1/135; G11; G11B; G11B7/00; G11B7/004; G11B7/0055; G11B7/00555; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/246; G11B7/25; G02F2202/00; G02F2202/14; Y; Y10; Y10S; Y10S430/00; Y10S430/146; Y10S430/163
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
118 words
A photorecording element consisting of: a transparent substrate; one or more monomolecular layers of photochromic compound disposed in direct contact with said transparent substrate and capable of reversibly changing its structure by virtue of light; and a layer of liquid crystals of one type selected from the group consisting of nematic, smectic and cholesteric types, said layer of liquid crystals being disposed in direct contact with said layer of photochromic compound and the long axes of said liquid crystals being arranged perpendicular to the surface of the substrate so that when the photochromic compound is exposed to light and consequently changes its structure, the long axes of said liquid crystals rearrange in the parallel direction to said surface.
Claim 2
Dependent Claim
118 words
A photorecording element consisting of: a transparent substrate; one or more monomolecular layers of photochromic compound disposed in direct contact with said transparent substrate and capable of reversibly changing its structure by virtue of light; and a layer of liquid crystals of one type selected from the group consisting of nematic, smectic and cholesteric types, said layer of liquid crystals being disposed in direct contact with said layer of photochromic compound and the long axes of said liquid crystals being arranged perpendicular to the surface of the substrate so that when the photochromic compound is exposed to light and consequently changes its structure, the long axes of said liquid crystals rearrange in the parallel direction to said surface.
Claim 3
Dependent Claim
17 words
The photorecording element according to claim 1, wherein said layer of photochromic compound is a monomolecular layer.
Claim 4
Dependent Claim
17 words
The photorecording element according to claim 1, wherein said layer of liquid crystals contains a dichroic dye.
Claim 5
Dependent Claim
34 words
The photorecording element according to claim 3, wherein the content of said dichroic dye is in the range of 0.1 to 10 wt %, based on the weight of said layer of liquid crystals.
Claim 6
Dependent Claim
35 words
The photorecording element according to claim 1, wherein said transparent substrate is provided with fine concave and convex areas on the surface thereof which is held in direct contact with said layer of photochromic compound.
Claim 7
Dependent Claim
126 words
A liquid crystal cell comprising a photorecording element, said photorecording element consisting of: a transparent substrate; one or more monomolecular layers of photochromic compound disposed in direct contact with said transparent substrate and capable of reversibly changing its structure by virtue of light; and a layer of liquid crystals of one type selected from the group consisting of nematic, smectic and cholesteric types, said layer of liquid crystals being disposed in direct contact with said layer of photochromic compound and the long axes of said liquid crystals being arranged perpendicular to the surface of the substrate so that when the photochromic compound is exposed to light and consequently changes its structure, the long axes of said liquid crystals rearrange in the parallel direction to said surface.
Claim 8
Dependent Claim
126 words
A liquid crystal cell comprising a photorecording element, said photorecording element consisting of: a transparent substrate; one or more monomolecular layers of photochromic compound disposed in direct contact with said transparent substrate and capable of reversibly changing its structure by virtue of light; and a layer of liquid crystals of one type selected from the group consisting of nematic, smectic and cholesteric types, said layer of liquid crystals being disposed in direct contact with said layer of photochromic compound and the long axes of said liquid crystals being arranged perpendicular to the surface of the substrate so that when the photochromic compound is exposed to light and consequently changes its structure, the long axes of said liquid crystals rearrange in the parallel direction to said surface.
Claim 9
Dependent Claim
18 words
The liquid crystal cell according to claim 6, wherein said layer of photochromic compound is a monomolecular layer.
Claim 10
Dependent Claim
18 words
The liquid crystal cell according to claim 6, wherein said layer of liquid crystals contains a dichroic dye.
Claim 11
Dependent Claim
35 words
The liquid crystal cell according to claim 8, wherein the content of said dichroic dye is in the range of 0.1 to 10 wt %, based on the weight of said layer of liquid crystals.
Claim 12
Dependent Claim
34 words
The liquid crystal cell according to claim 6, wherein said transparent substrate is provided with fine concave and convex areas on the surface thereof held in direct contact with said layer of photochromic compound.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |