Patent ID: 6271625
Filing Date: 2001-08-07
Classification: H01J

Abstract:
A picture display device comprising an envelope containing an luminescent display screen and an electron gun for producing at least one electron beam for deflection across the display screen, said electron gun comprising a main lens system having a first electrode, a second electrode, and at least one intermediate electrode disposed between said first and second electrodes, each of said electrodes having at least one aperture for passing the at least one electron beam, said at least one intermediate electrode comprising substantially identical, conductive first and second plates and means for conductively attaching said plates to each other with the at least one aperture in the first plate aligned with the at least one aperture in the second plate, where the at least one aperture in each of the first and second plates has a predetermined diameter and where the thickness of the at least one intermediate electrode is between 30% and 40% of said predetermined diameter.