Picture display device

Details Picture display device Picture display device

1990-01-08

1991-05-14

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315370, 313414, 313450, G09G 104, H01J 2958, H01J 2950, H01J 2946

Patent

active

050159259

ABSTRACT:
Picture display device comprising a display tube with an electron gun having a tubular structure with an outer surface and an inner surface on which a helical resistance structure is provided in a layer of a material having a high electrical resistance for constituting a focusing lens. In the layer is also formed a coaxial correction element for generating an electric multi-pole field. The outer surface is provided with electrodes of readily electrically conducting material arranged opposite the correction element for capacitively coupling a dynamic correction signal into the correction element.

REFERENCES:
patent: 3223871 (1965-12-01), Schlesinger
patent: 3979631 (1976-09-01), van der Ven

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