Color cathode ray tube having an in-line electron gun with asymm

Details Color cathode ray tube having an in-line electron gun with asymm Color cathode ray tube having an in-line electron gun with asymm

1997-06-05

1998-10-06

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313412, 3153821, 315 14, H01J 2662

Patent

active

058181571

ABSTRACT:
A color cathode ray tube includes an in-line electron gun having a main lens with recessed apertures. The main lens is formed by two electrodes. These electrodes have outer edges and recessed apertures which allow passage of three in-line electron beams and which are arranged at a distance d1 and d2, respectively, from the outer edges. The outermost apertures are asymmetric. The difference d1-d2 and the asymmetry of the outermost apertures is such that both the beam displacement and the core haze asymmetry are minimal.

REFERENCES:
patent: 4626738 (1986-12-01), Gerlach
patent: 4766344 (1988-08-01), Say
patent: 4940911 (1990-07-01), Stil
patent: 5146133 (1992-09-01), Shirai et al.

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