High brightness vacuum fluorescent display (VFD) devices

Details High brightness vacuum fluorescent display (VFD) devices High brightness vacuum fluorescent display (VFD) devices

1987-07-28

1989-01-31

Moore, David K.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

3151691, G09G

Patent

active

048018503

ABSTRACT:
Improved high brightness vacuum fluorescent display (VFD) devices are disclosed. In one case, an improved bistable phosphor view tube comprises a writing gun control grid, a writing gun anode and deflection means supported in a vacuum sealed tube envelope for deflecting an electron beam across a phosphor target layer at the front face of the tube wherein the improvement comprises an area cathode supported in close spaced proximity to the target layer to produce a two dimensional flood electron current over the full extent of the target phosphor target layer. In another case, an improved vacuum fluorescent display device utilizes phosphor anode elements that are electrically floating to function as a bistable elements wherein the phosphor layer portions may be selectively change to a stable second equilibrium potential state or remain at a stable first equilibrium potential state.

REFERENCES:
patent: 2186393 (1940-01-01), Ring
patent: 3710173 (1973-01-01), Hutchins et al.
patent: 4459514 (1910-07-01), Morimoto et al.
B. Kazan et al, Electronic Image Storage, Academic Press, pp. 1-11, 16-27 & 225-230, 1968.
J. Rajchman, "The Selective Electrostatic Storage Tube", RCA Review, vol. 12(1), pp. 53-97, Mar., 1951.
"A Large-Screen Display . . . " by Curtin et al, 1973 SID International Symp. Digest of Tech. Papers, pp. 98,99 (1973).

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