US3704056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging system
Assignee: Xerox Corp
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Filing: 1971-08-31
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Granted: 1972-11-28
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Expires: 1991-08-31
Abstract
Abstract An imaging system which imagewise transforms a cholesteric liquid crystalline material from its Grandjean or ''''disturbed'''' texture state to its focal-conic or ''''undisturbed'''' texture state by an imagewise applied electrical field whereby a cholesteric liquid crystalline member is imaged in a desired image configuration by the electrical field-induced texture transition system.
Inventors
- 👤 Joseph J Wysocki
- 👤 James E Adams
- 👤 Robert W Madrid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:28
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/42; C09K19/50; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/13718; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
22 words
The method of claim 1 wherein the liquid crystalline material is viewed with means for enhancing contrast between image and background areas.
Claim 2
Dependent Claim
14 words
The method of claim 2 wherein the liquid crystalline material is viewed between polarizers.
Claim 3
Dependent Claim
41 words
The method of producing a transient imaging system comprising performing the method of claim 1 and reducing the electrical field across the liquid crystalline material to a field strength below the texture change threshold field strength of the liquid crystalline material.
Claim 4
Dependent Claim
48 words
The method of producing a memory display comprising performing the method of claim 1 and reducing the electrical field across the liquid crystalline material to a field strength below the texture change threshold field strength of the liquid crystalline material whereby said material retains the image produced thereon.
Claim 5
Dependent Claim
44 words
The method of imaging a liquid crystalline material comprising providing a layer of liquid crystalline material comprising cholesteric liquid crystalline material shaped in image configuration between a pair of electrodes, one of which is substantially transparent, and performing the method of claim 1 thereon.
Claim 6
Dependent Claim
11 words
The method of claim 6 wherein both electrodes are substantially transparent.
Claim 7
Dependent Claim
40 words
The method of claim 6 wherein a plurality of independently operable liquid crystalline imaging cells are provided in a uni-planar imaging system and said individual cells are independently imaged to provide a desired composite image on the uni-planar imaging system.
Claim 8
Dependent Claim
55 words
The method of imaging a liquid crystalline imaging member comprising a layer of liquid crystalline material comprising cholesteric liquid crystalline material between a pair of electrodes one of which is substantially transparent and one of which is shaped in the desired image configuration, and performing the method of claim 1 upon said liquid crystalline material.
Claim 9
Dependent Claim
11 words
The method of claim 9 wherein both electrodes are substantially transparent.
Claim 10
Dependent Claim
15 words
The method of claim 9 wherein both electrodes are shaped in the desired image configuration.
Claim 11
Dependent Claim
38 words
The method of claim 9 wherein the electrode on one side of the liquid crystalline imaging material comprises an electrode in image configuration and a coplanar electrode in complementary background configuration corresponding to said electrode in image configuration.
Claim 12
Dependent Claim
39 words
The method of claim 9 wherein a plurality of independently operable liquid crystalline cells are provided in a uni-planar imaging system and said individual cells are independently imaged to provide a desired composite image on the uni-planar imaging system.
Claim 13
Dependent Claim
43 words
The method of claim 9 wherein a layer of liquid crystalline material is shaped in the same image configuration as the shaped electrode, and said congruently shaped liquid crystalline imaging layer and electrode are congruently aligned with one another in the imaging system.
Claim 14
Dependent Claim
24 words
The method of claim 1 wherein said liquid crystalline material is a layer of said material of thickness not greater than about 10 mils.
Claim 15
Dependent Claim
26 words
The method of claim 15 wherein said layer of liquid crystalline material is of a thickness in the range between about 1/4 and about 5 mils.
Claim 16
Dependent Claim
22 words
The method of claim 6 wherein said layer of liquid crystalline material is of a thickness not greater than about 10 mils.
Claim 17
Dependent Claim
26 words
The method of claim 17 wherein said layer of liquid crystalline material is of a thickness in the range between about 1/4 and about 5 mils.
Claim 18
Dependent Claim
40 words
The imaging method of claim 1 wherein portions of the liquid crystalline material are selectively imaged by the selective creation of an electrical field across the desired image areas, wherein said field is created by an electrical X-Y address system.
Claim 19
Dependent Claim
32 words
The method of claim 19 wherein the desired image areas are selectively and sequentially imaged by the application of electrical fields to the desired image areas By an electrical X-Y address system.
References Cited (Backward Citations)
US3627408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |