US5653914A
Expired / Lapsed
US
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Electroluminescent device comprising a chromophoric polymeric composition
Assignee: Cambridge Display Technology Ltd
•
Filing: 1993-12-17
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Granted: 1997-08-05
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Expires: 2013-12-17
Abstract
Abstract An electroluminescent device is provided incorporating an emissive layer comprising a processible polymer matrix such as poly(methylmethacrylate) and a chromophoric component such as an asymmetric stilbene or distyrylbenzene. The chromophoric component is blended with the polymer matrix or covalently attached thereto as a side chain and is selected to emit radiation in the region 400 nm to 500 nm when excited to luminesce.
Inventors
- 👤 Andrew Bruce Holmes
- 👤 Arno Kraft
- 👤 Paul Leslie Burn
- 👤 Stephen Carl Moratti
- 👤 Richard Henry Friend
- 👤 Donal Donat Conor Bradley
- 👤 Neil Clement Greenham
- 👤 Adam Richard Brown
- 👤 Josef Herbert Ferdinand Martens
- 👤 Franco Cacialli
- 👤 Johannes Gruener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:52
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; C; C09; C09K; C09K11/00; C09K11/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
An electroluminescent device incorporating an emissive layer comprising a processible polymer matrix and a chromophoric component which emits radiation in the region of 400-500 nm when excited to luminesce, wherein the chromophoric component is blended with the polymer matrix or covalently attached thereto as a side group and is selected from stilbene or distyrylbenzene, where at least one ring of stilbene or distyrylbenzene is substituted with a solubilizing group.
Claim 2
Dependent Claim
69 words
An electroluminescent device incorporating an emissive layer comprising a processible polymer matrix and a chromophoric component which emits radiation in the region of 400-500 nm when excited to luminesce, wherein the chromophoric component is blended with the polymer matrix or covalently attached thereto as a side group and is selected from stilbene or distyrylbenzene, where at least one ring of stilbene or distyrylbenzene is substituted with a solubilizing group.
Claim 3
Dependent Claim
24 words
An electroluminescent device according to claim 1, wherein the chromophoric component is selected to emit radiation in the region 430 nm to 480 nm.
Claim 4
Dependent Claim
23 words
An electroluminescent device according to claim 1, wherein aromatic groups of stilbene or distyrylbenzene are linked by a double bond in trans conformation.
Claim 5
Dependent Claim
24 words
An electroluminescent device according to claim 1, wherein the stilbene or distyrylbenzene is covalently attached to the polymer matrix by a non-conjugated spacer region.
Claim 6
Dependent Claim
14 words
An electroluminescent device according to claim 1, wherein the stilbene or distyrylbenzene is asymmetric.
Claim 7
Dependent Claim
13 words
An electroluminescent device according to claim 1, wherein the polymer matrix comprises poly(methylmethacrylate).
Claim 8
Dependent Claim
27 words
An electroluminescent device according to claim 1, wherein the chromophoric component forms at least a part of a chromophoric polymer and is blended with the polymer matrix.
Claim 9
Dependent Claim
16 words
An electroluminescent device according to claim 1, wherein the polymer matrix comprises poly(methylmethacrylate), polycarbonate or polystyrene.
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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) | 2000-08-04 | 2001-02-03 | 2001-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-04 | 2005-02-03 | 2005-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-04 | 2009-02-03 | 2009-08-05 | $7700.00 | Window Closed / Lapsed |