Electric lamp and discharge devices – With luminescent solid or liquid material – Vacuum-type tube
Patent
1997-06-09
1999-12-14
Patel, Ashok
Electric lamp and discharge devices
With luminescent solid or liquid material
Vacuum-type tube
313496, 313497, 313153, 313154, H01J 2900
Patent
active
060022043
ABSTRACT:
A display device comprises a cathode means for emitting electrons and a permanent magnet having a two dimensional array of channels extending between opposite poles of the magnet. The magnet generates, in each channel, a magnetic field for forming electrons from the cathode means into an electron beam. A screen receives an electron beam from each channel, the screen having a phosphor coating facing the side of the magnet remote from the cathode, the phosphor coating comprising a plurality of areas, each area being capable of illumination, at least one of the areas being capable of illumination by a plurality of the electron beams. Grid electrode means are disposed between the cathode means and the magnet for controlling flow of electrons from the cathode means into each channel, the grid electrode means comprising a plurality of elements each element corresponding to a different area of the phosphor capable of illumination. First anode means is disposed between the magnet and the screen for accelerating the electron beam towards the screen.
REFERENCES:
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patent: 4162422 (1979-07-01), Morimoto et al.
patent: 4164683 (1979-08-01), Nakamura et al.
patent: 4178593 (1979-12-01), Kishino et al.
patent: 4217578 (1980-08-01), Inami et al.
patent: 5172028 (1992-12-01), Watanabe
patent: 5889363 (1999-03-01), Beeteson
Beeteson John
Knox Andrew Ramsay
Bogdon Bernard D.
International Business Machines - Corporation
Patel Ashok
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