CRT electron gun with multi-lens system

Details CRT electron gun with multi-lens system CRT electron gun with multi-lens system

1987-12-15

1989-09-12

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313414, H01J 2951'29/62

Patent

active

048663352

ABSTRACT:
An electron gun for CRTs comprising multi-lens system is disclosed, wherein the rear part of the third electrode (16) forming the lens radius D3 is deeply recessed axialwise by interval H1 to provide the longer lens radius D3' equaling the lens radius D4 the fourth electrode (18) and the sixth electrode (22) is positioned inside the fifth electrode (20), thereby providing the main lens system forming the regions in the form of divergence-convergence-divergence-convergence-divergence-convergence- divergence, said sixth electrode (22) forming the subordinate lens against the main lens formed between the fifth electrode (20) and the seventh electrode (24), said interval H1 being limited within 0.5 to 0.54 of the lens radius D4of the fourth electrode.

REFERENCES:
patent: 4052643 (1977-10-01), Yamazaki et al.

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