Cathode ray tube with an ion trap including a barrier member

Details Cathode ray tube with an ion trap including a barrier member Cathode ray tube with an ion trap including a barrier member

1987-01-16

1988-06-07

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313444, 313446, H01J 2904, H01J 2984

Patent

active

047499044

ABSTRACT:
Positive ions generated in a vacuum tube (1) which may detrimentally influence the electron emission of a cathode (3) are trapped by a plate (35). The plate is present in an aperture (36) in a grid (37) to which it is connected via bars (40). The aperture (36) is sufficiently large to pass the generated beam (6), while the bars (40) hardly influence the beam intensity.

REFERENCES:
patent: 4075533 (1978-02-01), Janko
patent: 4350924 (1982-09-01), Misono
patent: 4682074 (1987-07-01), Hoeberechts et al.

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