Line cathode structure having recessed geometry

Details Line cathode structure having recessed geometry Line cathode structure having recessed geometry

1979-11-27

1981-12-29

Demeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313446, H01J 2974

Patent

active

043084869

ABSTRACT:
A flat panel display device having a plurality of electron propagation channels utilizes a line cathode. The cathode extends across all the channels and modulation electrodes associated with the channels cause the cathode to emit the electrons into the spaces between parallel guide meshes within the propagation channels. The cathode and modulation electrodes are arranged in a recessed cavity in the proximity of launch electrodes so that the electrons are emitted at high velocity into the propagation channels to travel curved paths along which the electron beams are converged into the spaces between the guide meshes. Electron propagation structure within the channels, therefore, is displaced from the cathode so that the cathode heat has a substantially reduced effect on the propagation structure, and the high electron velocity minimizes the effect of mechanical tolerances on the electron beam.

REFERENCES:
patent: 3226587 (1965-12-01), Chin
patent: 3492531 (1970-01-01), Owaki et al.
patent: 3531681 (1970-09-01), Harden
patent: 3588600 (1971-06-01), Nakagama et al.
patent: 3621319 (1971-11-01), Heynisch et al.

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