Flat cathodic tube display

Details Flat cathodic tube display Flat cathodic tube display

1976-04-13

1978-02-21

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313366, 313220, H01J 2950, H01J 3110

Patent

active

040755355

ABSTRACT:
A video cathode tube having a matrix of low emission threshold field effect emitters oriented to emit toward a luminescent layer. A first system of mutually insulated conductive paths is arranged along rows of emitters with the emitters in any row electrically connected to a corresponding conductive path of the first system. A second system of mutually insulated conductive paths is disposed in contact with the luminescent layer and extends in front of columns of the emitters. A first bank of contacts individually connected to respective conductive paths of the first system are sequentially energized to a first potential, and a second bank of contacts individually connected to respective conductive paths of the second system are sequentially energized to a second potential. A control grid connectable to a voltage source is interposed between the matrix of emitters and the second system of conductive paths. By modulating the potentials of the contacts with electrical signals representing an image when the grid is properly biased, luminous points on the luminescent layer will be sequentially developed opposite successive emitters to display on the luminescent layer an image represented by the electrical signals.

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