Field emission light source

Patent 6573643 Issued on June 3, 2003. Estimated Expiration Date:

October 2, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2392161

3413510

Edge effect elimination and beam forming designs for field emitting arrays
Patent #: 4345181
Issued on: 08/17/1982
Inventor: Shelton

Single substrate, vacuum fluorescent display
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Patent #: 5801486
Issued on: 09/01/1998
Inventor: Johnson, et al.

Light source including a field emission cathode, and a field emission cathode
Patent #: 6008575
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Alignment of carbon nanotubes Patent #: 6312303
Issued on: 11/06/2001
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Inventors

Application

No. 677361 filed on 10/02/2000

US Classes:

313/309, DISCHARGE DEVICES HAVING A MULTIPOINTED OR SERRATED EDGE ELECTRODE313/346R, Cathodes containing and/or coated with electron emissive material313/496Phosphor on anode segments

Examiners

Primary: Patel, Ashok

Attorney, Agent or Firm

Foreign Patent References

845154 EP. 11/13/1999
58218747 JP 12/13/1983

International Class

H01J 001/30

Abstract

A field emission cathode for use in flat panel displays is described including a layer of conductive material and a layer of amorphic diamond film, functioning as a low effective work-function material, deposited over the conductive material to form emission sites. The emission sites each contain at least two sub-regions having differing electron affinities. Use of the cathode to form a computer screen is also described along with the use of the cathode to form a fluorescent light source.