In-line SB electron gun with large and deep main lens apertures

Details In-line SB electron gun with large and deep main lens apertures In-line SB electron gun with large and deep main lens apertures

1997-07-30

2000-01-11

Patel, Nimeshkumar D.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, 313441, 313428, H01J 2950

Patent

active

060139765

ABSTRACT:
An in-line electron gun includes a main lens having G3 and G4 three aperture electrodes and corresponding chain link (extended aperture) electrodes. The outer apertures in each of the G3 and G4 electrodes are barrel shaped and the middle aperture is elliptical. This construction maximizes the aperture area. The spacings between the G3 and G4 electrodes and their corresponding chain link electrodes are maximized within the existing size constraints of the gun. The combined effect weakens the electric field of the main lens which reduces spherical aberration.

REFERENCES:
patent: 5300854 (1994-04-01), Kweon
patent: 5483128 (1996-01-01), Chen
patent: 5488265 (1996-01-01), Chen

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