Multi-digit fluorescent display tube with differently spaced pla

Details Multi-digit fluorescent display tube with differently spaced pla Multi-digit fluorescent display tube with differently spaced pla

1976-06-10

1977-08-30

Demeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

313294, 313302, H01J 1938, H01J 1942, H01J 6306

Patent

active

040457044

ABSTRACT:
A multi-digit fluorescent display tube is disclosed. The display tube includes a plurality of indicating patterns arranged in a row in spaced side-by-side relational along the longitudinal width of a substrate, a filament stretched along the longitudinal direction of the indicating patterns and a control grid disposed between the filament and the indicating pattern, wherein the control grid is positioned in different plane distances with respect to the filament so as to adjust the perveance in each of the indicating patterns and to obtain an uniform brightness of the indicating patterns.

REFERENCES:
patent: 2048224 (1936-07-01), Snow
patent: 2887610 (1959-05-01), Smith
patent: 3836806 (1974-09-01), Kobayakawa et al.

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