Patent US5949185A successfully refreshed from Google Patents.
US5949185A
Expired / Lapsed
US
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Field emission display devices
Assignee: JLJ Inc (AN OHIO CORPORATION)
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Filing: 1998-05-28
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Granted: 1999-09-07
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Expires: 2018-05-28
Abstract
Abstract A cathodoluminescent field emission display devices features an enhancement layer disposed over an outer surface of a substantially planar cathode electron emitter of the device. The enhancement layer provides enhanced secondary electron emissions. The enhancement layer is preferably near mono-molecular film of an oxide of barium, beryllium, calcium, magnesium, strontium or aluminum.
Inventors
- 👤 John L. Janning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:54
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/125; H01J31/127; H01J1/00; H01J1/02; H01J1/30; H01J1/304; H01J29/00; H01J29/46; H01J29/467
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
60 words
In a field emission display device including at least one substantially planar cathode electron emitter and a light emitting layer of cathodoluminescent material for bombardment by electrons resulting from operation of the cathode emitter, the improvement comprising: an enhancement layer disposed on an outer surface of the planar cathode emitter for providing enhanced secondary emissions of electron within the device.
Claim 2
Dependent Claim
60 words
In a field emission display device including at least one substantially planar cathode electron emitter and a light emitting layer of cathodoluminescent material for bombardment by electrons resulting from operation of the cathode emitter, the improvement comprising: an enhancement layer disposed on an outer surface of the planar cathode emitter for providing enhanced secondary emissions of electron within the device.
Claim 3
Dependent Claim
14 words
The device of claim 1 wherein the enhancement layer is near monomolecular in thickness.
Claim 4
Dependent Claim
22 words
The device of claim 2 wherein the enhancement layer is fashioned from material exhibiting high secondary electron emissions when bombarded by electrons.
Claim 5
Dependent Claim
27 words
The device of claim 2 wherein the enhancement layer is fashioned from material selected from the group comprising oxides of barium, beryllium, calcium, magnesium, strontium and aluminum.
Claim 6
Dependent Claim
18 words
The device of claim 1 wherein the enhancement layer has a thickness on the order of 10 Angstroms.
Claim 7
Dependent Claim
114 words
A cathodoluminescent field emission display device, which comprises: a faceplate through which emitted light is transmitted from an inside surface to an outside surface of the faceplate for viewing; a substantially planar cathode emitter for primary field emissions of electrons; an enhancement layer disposed on an outer surface of the planar cathode emitter for providing enhanced secondary emissions of electron; an anode, comprising a layer of electrically conductive material disposed between the inside surface of the faceplate and the cathode emitter; and a light emitter layer of cathodoluminescent material capable of emitting light through the faceplate in response to bombardment by electrons emitted within the device, disposed between the anode and the cathode emitter.
Claim 8
Dependent Claim
114 words
A cathodoluminescent field emission display device, which comprises: a faceplate through which emitted light is transmitted from an inside surface to an outside surface of the faceplate for viewing; a substantially planar cathode emitter for primary field emissions of electrons; an enhancement layer disposed on an outer surface of the planar cathode emitter for providing enhanced secondary emissions of electron; an anode, comprising a layer of electrically conductive material disposed between the inside surface of the faceplate and the cathode emitter; and a light emitter layer of cathodoluminescent material capable of emitting light through the faceplate in response to bombardment by electrons emitted within the device, disposed between the anode and the cathode emitter.
Claim 9
Dependent Claim
14 words
The device of claim 6 wherein the enhancement layer is near monomolecular in thickness.
Claim 10
Dependent Claim
22 words
The device of claim 7 wherein the enhancement layer is fashioned from material exhibiting high secondary electron emissions when bombarded by electrons.
Claim 11
Dependent Claim
27 words
The device of claim 7 wherein the enhancement layer is fashioned from material selected from the group comprising oxides of barium, beryllium, calcium, magnesium, strontium and aluminum.
Claim 12
Dependent Claim
18 words
The device of claim 6 wherein the enhancement layer has a thickness on the order of 10 Angstroms.
References Cited (Backward Citations)
US4857161A
Cited
US5378963A
Cited
US5473219A
Cited
US5384509A
Cited
US5229331A
Cited
US5473218A
Cited
US5656887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-09-06 | 2003-03-08 | 2003-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-09-06 | 2007-03-08 | 2007-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-09-06 | 2011-03-08 | 2011-09-07 | $7700.00 | Window Closed / Lapsed |