Electron beam apparatus having an electron lens and a structure

Details Electron beam apparatus having an electron lens and a structure Electron beam apparatus having an electron lens and a structure

1997-05-05

1999-03-02

Pascal, Robert

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

313497, 315382, 345 74, H01J 2962

Patent

active

058775943

ABSTRACT:
In a cold cathode electron beam device, groups of electron emission cones emit electrons which are extracted from the cones by respective extraction electrodes. The emitted electrons are focussed into a beam by an electron lens so as to strike a fluorescent screen. In order to minimize the size of the beam spot where the beam strikes the screen, a structure is included which compensates for a spherical aberration property which is inherent to the electron lens. The spherical aberration is compensated for by placing a focus electrode for each group of electron emission cones on a common substrate along with the extraction electrode, such that the focus electrode surrounds the extraction electrode.

REFERENCES:
patent: 5191217 (1993-03-01), Kane et al.
patent: 5528103 (1996-06-01), Spindt et al.
patent: 5552659 (1996-09-01), Macaulay et al.
Kesling et al., "Beam Focusing for Field-Emission Flat-panel Displays", IEEE Transactions on Electron Devices, vol. 42, No. 2, pp. 340-347, Feb. 1995.
C.A. Spindt, "A Thin-Film Field-Emission Cathode", Journal of Applied Physics, vol. 39, No. 7, 1968, pp. 3504-3505.

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