Luminescent display device

Details Luminescent display device Luminescent display device

1984-07-30

1987-12-01

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340772, G09G 300

Patent

active

047107650

ABSTRACT:
A luminescent display cell comprising a glass envelope having a front panel, a side wall, and a rear plate. Plural luminescent display segments are formed on the front panel of the glass envelope, the display segments being supplied with an anode voltage. Plural cathodes are arranged on the rear panel side of the glass envelope in corresponding relation to the display segments. Plural control grid electrodes are arranged between the display segments and the cathodes in corresponding relation to the display segments. A common accelerating electrode is disposed between the display segments and the control grid electrodes. The voltage applied to each control grid electrode is controllable for electron emission from the cathodes so as to render each display segment corresponding to each control grid electrode selectively luminous for display. Furthermore, a separator surrounds each display segment and it is supplied with the above anode voltage so that diffusion lens is formed which allows the electron beam from the cathode to be spread laterally and radiated to the entire surface of the display segment to be rendered luminous.

REFERENCES:
patent: 2964672 (1960-12-01), Nixon
patent: 3140473 (1964-07-01), Gaffney, Jr.
patent: 3407331 (1968-10-01), Salgo
patent: 3935499 (1976-01-01), Oess
patent: 4156239 (1979-05-01), Hirano et al.
patent: 4166233 (1979-08-01), Stanley
patent: 4218636 (1980-08-01), Miyazawa
patent: 4608518 (1986-08-01), Fukuda et al.

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