US3897137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device containing a liquid-crystal cell and a suspended-crystal cell arranged in series
Assignee: Boeing North American Inc
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Filing: 1974-01-28
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Granted: 1975-07-29
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Expires: 1994-01-28
Abstract
Abstract A display device using liquid-crystal material and suspendedcrystal material to produce a display device exhibiting high visibility and excellent contrast. The display includes a multilayered configuration of conductive elements (electrodes) appropriately supported on suitable support means with separate layers of liquid-crystal material or suspended-crystal material between the layers.
Inventors
- 👤 John P Dobbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:31
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1347
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
73 words
In combination, a liquid-crystal cell, which becomes transformed from a transparent state to a turbid state upon being energized a suspended-crystal cell which becomes transformed from an absorptive state to a transparent state upon being energized disposed adjacent to and overlying said liquid-crystal cell, and means for selectively energizing each of said cells concurrently to produce a display effect by the combined operation of the respective cells in response to the energizing thereof.
Claim 2
Dependent Claim
73 words
In combination, a liquid-crystal cell, which becomes transformed from a transparent state to a turbid state upon being energized a suspended-crystal cell which becomes transformed from an absorptive state to a transparent state upon being energized disposed adjacent to and overlying said liquid-crystal cell, and means for selectively energizing each of said cells concurrently to produce a display effect by the combined operation of the respective cells in response to the energizing thereof.
Claim 3
Dependent Claim
52 words
The combination recited in claim 1 wherein said liquid-crystal cell includes a pair of substantially parallel plates with liquid-crystal material therebetween, said suspended-crystal cell includes a pair of substantially parallel plates with suspended-crystal material therebetween, at least one of the plates of each of said pair Of plates being a common plate.
Claim 4
Dependent Claim
27 words
The combination recited in claim 2 including electrodes on each of said plates, whereby electrical fields can be established through the liquid-crystal material and the suspended-crystal material.
Claim 5
Dependent Claim
30 words
The combination recited in claim 3 wherein at least one electrode in each cell has the same configuration, and the electrodes having the same configuration are aligned with each other.
Claim 6
Dependent Claim
90 words
In combination, first, second, and third plates in spaced-apart, substantially parallel relation, a layer of liquid-crystal material between said first and second plates, a layer of suspended-crystal material between said second and third plates, and electrically conducting electrodes formed on both surfaces of said second plate and on the surface of said first and third plates which face said second plate, the electrode on said first plate and the electrode on the surface of said second plate which faces said third plate having the same configuration and being in alignment.
Claim 7
Dependent Claim
90 words
In combination, first, second, and third plates in spaced-apart, substantially parallel relation, a layer of liquid-crystal material between said first and second plates, a layer of suspended-crystal material between said second and third plates, and electrically conducting electrodes formed on both surfaces of said second plate and on the surface of said first and third plates which face said second plate, the electrode on said first plate and the electrode on the surface of said second plate which faces said third plate having the same configuration and being in alignment.
Claim 8
Dependent Claim
17 words
The combination recited in claim 5 wherein said third plate includes an inner surface which is reflective.
Claim 9
Dependent Claim
49 words
The combination recited in claim 6 including means for selectively applying a potential to said electrodes to concurrently produce an electric field through the respective crystal materials such that said liquid-crystal material is rendered substantially turbid and at substantially the same time said suspended-crystal material is rendered effectively transparent.
Claim 10
Dependent Claim
19 words
The combination recited in claim 5 wherein said first and second plates are transparent, and said electrodes are transparent.
Claim 11
Dependent Claim
15 words
The combination recited in claim 6 wherein said third plate comprises an electrically conductive material.
Claim 12
Dependent Claim
17 words
The combination recited in claim 5 wherein said liquid crystal material is of the dynamic scattering type.
Claim 13
Dependent Claim
23 words
The combination recited in claim 5 wherein said suspended crystal material is a fluid electro optic medium comprising colloidally dispersed electrically dipolar crystals.
Claim 14
Dependent Claim
22 words
The combination recited in claim 4 wherein the other electrode in each cell completely encompasses said one electrode in the associated cell.
Claim 15
Dependent Claim
25 words
The combination recited in claim 5 wherein said electrodes include individual electrode segments arranged in a suitable array to selectively define a plurality of characters.
References Cited (Backward Citations)
US3257903A
Cited
US3675988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |