Drive circuit for fluorescent display tube

Details Drive circuit for fluorescent display tube Drive circuit for fluorescent display tube

1986-12-16

1987-09-01

Chatmon, Saxfield

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

340776, 340813, 3151691, 3151694, 315260, G09G 310

Patent

active

046911456

ABSTRACT:
A drive circuit for a fluorescent display tube used for displaying numerals, characters, and so on, which circuit includes a plurality of drivers for switching the potential of segments and/or grids of the fluorescent display tube. Part or all of the drivers each has a plurality of transistor elements whose drive timings differ from each other, thereby decreasing the transition speed of the output signals of the drivers and preventing the drivers from being destroyed by excessive voltage caused by the switching operation thereof.

REFERENCES:
patent: 4068148 (1978-01-01), Nomiya et al.
patent: 4109180 (1978-08-01), Ogle et al.
patent: 4286174 (1981-08-01), Dingwall
patent: 4384287 (1983-05-01), Sakuma
patent: 4472660 (1984-09-01), Knothe et al.
patent: 4523217 (1985-06-01), Jibu

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