Beam shaping CRT electrode

Details Beam shaping CRT electrode Beam shaping CRT electrode

1985-09-03

1986-12-09

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Plural beam generating or control

313458, 313448, H01J 2946

Patent

active

046282246

ABSTRACT:
A CRT electron gun electrode is provided with an improved beam shaping region having an elongated recess coined in the upper electrode surface and an opposed coined depression in the lower surface. The double coining fabrication method assures a sharp perimetrical edge about at least the central portion of the recess, such being an important influence in achieving improved beam shaping lensing.

REFERENCES:
patent: 3919583 (1975-11-01), Hasker et al.
patent: 4104554 (1978-08-01), Kolbeck et al.
patent: 4242613 (1980-12-01), Bambring et al.
patent: 4366414 (1982-12-01), Hatayama et al.
Barten et al., "30AX Self-Aligning 110.degree. In-Line Color TV Display," IDD Spring Conference (Jun. 1978); pp. 1-7.

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