Method and apparatuses for providing uniform electron beams...

Details Method and apparatuses for providing uniform electron beams... Method and apparatuses for providing uniform electron beams...

2006-05-23

2006-05-23

Lee, Wilson (Department: 2821)

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

C313S495000

Reexamination Certificate

active

07049753

ABSTRACT:
The invention includes field emitters, field emission displays (FEDs), monitors, computer systems and methods employing the same for providing uniform electron beams from cathodes of FED devices. The apparatuses each include electron beam uniformity circuitry. The electron beam uniformity circuit provides a grid voltage, VGrid, with a DC offset voltage sufficient to induce field emission from a cathode and a periodic signal superimposed on the DC offset voltage for varying the grid voltage at a frequency fast enough to be undetectable by the human eye. The cathodes may be of the micro-tipped or flat variety. The periodic signal may be sinusoidal with peak-to-peak voltage of between about 5 volts and about 50 volts.

REFERENCES:
patent: 3656146 (1972-04-01), Mead
patent: 4178531 (1979-12-01), Alig
patent: 4450387 (1984-05-01), Reed et al.
patent: 5103144 (1992-04-01), Dunham
patent: 5399946 (1995-03-01), Son et al.
patent: 5410218 (1995-04-01), Hush
patent: 5567929 (1996-10-01), Ouimette
patent: 5581159 (1996-12-01), Lee et al.
patent: 5628659 (1997-05-01), Xie et al.
patent: 5628661 (1997-05-01), Kim et al.
patent: 5653619 (1997-08-01), Cloud et al.
patent: 5656886 (1997-08-01), Westphal et al.
patent: 5656887 (1997-08-01), Voshell et al.
patent: 5656892 (1997-08-01), Zimlich et al.
patent: 5675216 (1997-10-01), Kumar et al.
patent: 5679043 (1997-10-01), Kumar
patent: 5686791 (1997-11-01), Kumar et al.
patent: 5703435 (1997-12-01), Kumar et al.
patent: 5739522 (1998-04-01), Ouimette
patent: 5759078 (1998-06-01), Levine et al.
patent: 5773927 (1998-06-01), Zimlich
patent: 5818500 (1998-10-01), Edwards et al.
patent: 5827100 (1998-10-01), Kim
patent: 5831397 (1998-11-01), Stevens et al.
patent: 5847504 (1998-12-01), Baldi
patent: 5847515 (1998-12-01), Lee et al.
patent: 5856812 (1999-01-01), Hush et al.
patent: 5920154 (1999-07-01), Hush
patent: 5975975 (1999-11-01), Hofmann et al.
patent: 6084345 (2000-07-01), Janning
patent: 6144144 (2000-11-01), Cleeves et al.
patent: 6144350 (2000-11-01), Fujii et al.
patent: 6252348 (2001-06-01), Lee
patent: 6448717 (2002-09-01), Rasmussen
patent: 6492777 (2002-12-01), Hush
patent: 6657376 (2003-12-01), Raina et al.
Curtin, “The Field Emission Display: A New Flat Panel Technology”, 1991 IEEE, pps. 12-15.

Affiliated with

Also associated with

Rating

Method and apparatuses for providing uniform electron beams... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatuses for providing uniform electron beams..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatuses for providing uniform electron beams... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3563557