Patent US4717859A successfully refreshed from Google Patents.
US4717859A
Expired / Lapsed
US
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Polychromatic electro luminescence display device
Assignee: LG Electronics Inc
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Filing: 1985-12-13
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Granted: 1988-01-05
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Expires: 2005-12-13
Abstract
Abstract The present invention relates to an electroluminescent display device with polychromatic emissions which comprises one photo electroluminescent layer containing a composition of Na 0 .5 Tb 0 .25 Eu 0 .25 WO 4 which is combined with an existent fluorescent layer, the thickness of which is one-third that of the fluorescent layer.
Inventors
- 👤 Sang H. Sohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:49
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7783; C09K11/7794
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
152 words
An electroluminescence plane display device comprising in combination, sequentially: a glass substrate; transparent electrodes in the shape of rows of stripes formed in a first direction on said glass substrate; a first lower insulation layer overlying said transparent electrodes; photon luminous layers in the shape of rows of stripes formed on said first insulation layer in a second direction perpendicular to said first direction of said transparent electrodes; a fluorescent layer superimposed over and between said photon luminous layers; a second upper insulation layer overlying said fluorescent layer; and rear electrodes in the shape of rows of stripes formed in said second direction parallel to said rows of photon luminous layers and perpendicular to said first direction of said rows of transparent electrodes, said rows of photon luminous layers being spaced alternately with respect to said rear electrodes opposite each space which exists between the rows of stripes of said rear electrodes.
Claim 2
Dependent Claim
152 words
An electroluminescence plane display device comprising in combination, sequentially: a glass substrate; transparent electrodes in the shape of rows of stripes formed in a first direction on said glass substrate; a first lower insulation layer overlying said transparent electrodes; photon luminous layers in the shape of rows of stripes formed on said first insulation layer in a second direction perpendicular to said first direction of said transparent electrodes; a fluorescent layer superimposed over and between said photon luminous layers; a second upper insulation layer overlying said fluorescent layer; and rear electrodes in the shape of rows of stripes formed in said second direction parallel to said rows of photon luminous layers and perpendicular to said first direction of said rows of transparent electrodes, said rows of photon luminous layers being spaced alternately with respect to said rear electrodes opposite each space which exists between the rows of stripes of said rear electrodes.
Claim 3
Dependent Claim
28 words
The electro luminescence display device according to claim 1, wherein said luminous material of photon luminous layers consists of Na 0 .5 Tb0.25Eu 0 .25 Wo 4 .
Claim 4
Dependent Claim
24 words
The electroluminescence display device according to claim 1, where the thickness of said photon luminous layers is one third that of said fluoroscent layer.
References Cited (Backward Citations)
US3339075A
Cited
US3854070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |