Electron-optical device

Details Electron-optical device Electron-optical device

1996-09-04

1998-11-03

Patel, Ashok

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313439, 313447, 313427, H01J 2920, H01J 2970

Patent

active

058313800

ABSTRACT:
An electron has an electron-emitting region, a longitudinal axis and an arrangement of apertured electron grids along the axis. A first grid has an aperture for passing electrons, which aperture is located further outwards with respect to the longitudinal axis than the emitting region. One of the other grids is provided with a shield so as to shield the edge wall of the aperture, if it is located within direct view of the electron-emitting region, from incidence of positive ions.

REFERENCES:
patent: 2604599 (1952-07-01), Breeden
patent: 4574216 (1986-03-01), Hoeberechts et al.
patent: 4749904 (1988-06-01), Vasterink
patent: 5144197 (1992-09-01), Peters et al.
patent: 5202609 (1993-04-01), Tomii et al.
patent: 5220240 (1993-06-01), Ohoshi et al.
patent: 5497046 (1996-03-01), Van Gorkom et al.

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