Multi-digit luminescent display tube having wider grid frame mem

Details Multi-digit luminescent display tube having wider grid frame mem Multi-digit luminescent display tube having wider grid frame mem

1977-01-26

1978-01-24

Demeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

Vacuum-type tube

313513, H01J 172, H01J 6302

Patent

active

040705994

ABSTRACT:
A multi-digit luminescent display tube comprises a plurality of luminescent anode segment groups. All anode segment groups may be regularly spaced. Alternatively, at least one single anode segment group may be spaced wider from the remaining regularly spaced ones. A grid is interposed between a cathode and each anode segment group and comprises a pair of grid frame members, or rectangular metal rods, transversely of the cathode. Two of the frame members are made wider on both ends of a series of regularly spaced grids than other frame members of the grid series. Both frame members are also made wider for the single anode segment group than the above-mentioned other frame members.

REFERENCES:
patent: 4041348 (1977-08-01), Eto et al.

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