Vacuum fluorescent display having a grid plate coplanar with the

Details Vacuum fluorescent display having a grid plate coplanar with the Vacuum fluorescent display having a grid plate coplanar with the

1975-12-01

1977-01-18

Demeo, Palmer C.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

313494, 313497, 313513, H01J 172, H01J 6306, H05B 3702

Patent

active

040041867

ABSTRACT:
A vacuum fluorescent display is disclosed having a grid plate substantially coplanar with the anode and which is controllable with conventional metal oxide semiconductor devices. Each digit of the display includes a segmented anode structure substantially surrounded by a control electrode or grid plate. At least one cathode is disposed adjacent the anode segments and control electrode such that the distance between the cathode and the control electrode is less than the distance between the cathode and any of the anode segments. Utilizing such a structure, a voltage on the order of about -5 volts on the control electrode is effective to cut off luminescence from any of the anode segments of that digit.

REFERENCES:
patent: 3555544 (1971-01-01), Atkins
patent: 3584252 (1971-06-01), DuBois, Jr.
patent: 3668466 (1972-06-01), Shimada
patent: 3780326 (1973-12-01), Raago

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