Electric lamp and discharge devices – With luminescent solid or liquid material – Vacuum-type tube
Patent
1995-11-29
1998-03-31
O'Shea, Sandra L.
Electric lamp and discharge devices
With luminescent solid or liquid material
Vacuum-type tube
313309, 313336, 313351, 313496, H01J 130
Patent
active
057342237
ABSTRACT:
In a field emission cold cathode composed of a plurality of micro cold cathodes, the diameter of a plurality of openings formed in a gate electrode is large at a central region of an electron emission zone but small at a peripheral region of the electron emission zone, or the thickness of the gate electrode is small at the central region of the electron emission zone but large at the peripheral region of the electron emission zone. Alternatively, the thickness of an insulator layer is small at the central region of the electron emission zone but large at the peripheral region of the electron emission zone. Or, a resistance layer is provided between a substrate and a plurality of electron emission electrodes, and resistivity of the resistance layer is small at the central region of the electron emission zone but large at the peripheral region of the electron emission zone.
REFERENCES:
patent: 5278472 (1994-01-01), Smith et al.
"A Thin-Film Field-Emission Cathode," Spindt, C.A., J. Applied Physics, vol. 39, No. 7, Jun. 1968, 3504-3505.
Makishima Hideo
Yanai Yoshiaki
NEC Corporation
O'Shea Sandra L.
Patidar Jay M.
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