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Patent US5659224A successfully refreshed from Google Patents.
US5659224A
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Cold cathode display device
Assignee: Microelectronics and Computer Technology Corp
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Filing: 1995-06-07
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Granted: 1997-08-19
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Expires: 2015-06-07
Abstract
Abstract A display device for use in conjunction with a computer system includes a cathode having a layer of conductive material and a layer of low-effective work function material deposited over the conductive material wherein the low-effective work function material has an emission surface comprising a plurality of distributed localized electron emission sites. The emission sites may have electrical properties which are discontinuous from each other. The emission surface may be relatively flat.
Inventors
- 👤 Nalin Kumar
- 👤 Chenggang Xie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:14
CPC Classifications
H; H01; H01J; H01J63/00; H01J63/06; H01J1/00; H01J1/02; H01J1/30; H01J1/304; H01J1/3042; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/125; H01J31/127; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/067; H01J61/0675; H01J61/0677; H01J9/00; H01J9/02; H01J9/022; H01J9/027; H01J2201/00; H01J2201/30; H01J2201/304; H01J2201/30403; H01J2201/30426; H01J2201/30446; H01J2201/30453; H01J2201/30457; H01J2329/00; H01J2329/86; H01J2329/8625; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
54 words
A display device for use in conjunction with a computer system, said display device including a cathode, comprising; a layer of conductive material; and a layer of polycrystalline diamond deposited over said conductive material, said polycrystalline diamond having a relatively flat emission surface comprising a plurality of distributed localized relatively flat electron emission sites.
Claim 2
Dependent Claim
54 words
A display device for use in conjunction with a computer system, said display device including a cathode, comprising; a layer of conductive material; and a layer of polycrystalline diamond deposited over said conductive material, said polycrystalline diamond having a relatively flat emission surface comprising a plurality of distributed localized relatively flat electron emission sites.
Claim 3
Dependent Claim
21 words
The display device as recited in claim 1 wherein said emission sites have electrical properties which are discontinuous from each other.
Claim 4
Dependent Claim
18 words
The display device as recited in claim 1 wherein said sites have at least two different electron affinities.
Claim 5
Dependent Claim
18 words
The display device as recited in claim 1 wherein each said site is under 1 micron in diameter.
Claim 6
Dependent Claim
22 words
The display device as recited in claim 1 wherein each said site is less than or equal to 0.1 micron in diameter.
Claim 7
Dependent Claim
17 words
The display device as recited in claim 1 wherein some of said polycrystalline diamond is amorphic diamond.
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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) | 2000-08-18 | 2001-02-17 | 2001-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-18 | 2005-02-17 | 2005-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-18 | 2009-02-17 | 2009-08-19 | $7700.00 | Window Closed / Lapsed |