Cathode ray tube having a tubular electron gun structure

Details Cathode ray tube having a tubular electron gun structure Cathode ray tube having a tubular electron gun structure

1988-02-16

1989-08-15

Wieder, Kenneth

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313414, 313479, H01J 2962, H01J 2988

Patent

active

048577979

ABSTRACT:
The invention relates to a cathode ray tube having an envelope 1 comprising a screen 2 and an electron gun 3 which is situated inside the envelope 1 opposite to the screen and which has three electrodes 4, 5 and 6, which electrodes are provided coaxially on the inner wall of a glass tube 7 in adjoining places having diameters differing for each electrode. In order to obtain, for example, smaller dimensions and a better alignment of the electron gun and a higher resolution, a focusing lens associated with the electron gun 3 is a high-ohmic resistance layer 8 having a spiral shape 9.

REFERENCES:
patent: 3143681 (1964-08-01), Schlesinger
patent: 3375390 (1968-03-01), Schlesinger
patent: 4695775 (1987-09-01), Ritzman et al.
patent: 4713879 (1987-12-01), Vrijssen

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