Color cathode ray tube comprising an in-line electron gun

Details Color cathode ray tube comprising an in-line electron gun Color cathode ray tube comprising an in-line electron gun

1997-10-22

1999-10-05

Patel, Nimeshkumar D.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313412, H01J 2948

Patent

active

059629630

ABSTRACT:
A color cathode ray tube of the in-line type has a pre-focusing lens part and a main lens part. The prefocusing lens part comprises a first (G1) and a second (G2) electrode, each having apertures for passing electron beams. The apertures in the second electrode comprise a first (G2A) and a second (G2B) aperture, each being substantially stigmatic. The diameters of the apertures are different and 1.5.ltoreq..O slashed.G2B/.O slashed.G2A.ltoreq.5.

REFERENCES:
patent: 4337409 (1982-06-01), Van Der Heijden et al.
patent: 4877998 (1989-10-01), Maninger et al.
patent: 4890032 (1989-12-01), Bijma et al.

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