In-line electron gun

Details In-line electron gun In-line electron gun

1990-08-31

1991-10-29

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315 15, 313414, 313449, H01J 2958

Patent

active

050618814

ABSTRACT:
The invention provides an in-line electron gun in which first astigmatic lens fields that are convergent in a horizontal direction and divergent in a vertical direction are produced between a first focusing grid and a second focusing grid, and second astigmatic lens fields that are divergent in a horizontal direction and convergent in a vertical direction are produced upstream of the first focusing grid. The lens magnifications in both horizontal and vertical directions can be made substantially equal, so that it is possible to achieve a satisfactory resolution over the entire area of the phosphor screen and also to prevent moire occurrences.

REFERENCES:
patent: 4772827 (1988-09-01), Osakabe
patent: 4814670 (1989-03-01), Suzuki et al.
patent: 4851741 (1989-07-01), Shirai et al.

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