Color plasma display device

Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...

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313485, 313489, 340772, 340718, G09G 328

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active

044293038

ABSTRACT:
A multicolor gaseous discharge display device utilizes electroluminescent techniques as a plasma environment. A layer of electroluminescent phosphor material is used as the dielectric layer overlying the conductor electrodes in an A.C. plasma device. In one embodiment for generating a two color display, only one of the dielectric layers uses an electroluminescent phosphor for a two color display. In a second embodiment, both dielectric layers use different electroluminescent material for a three color display. A layer of n-type semiconductor material is required between the conductor electrodes and the phosphor dielectric to reduce the electroluminescent voltage threshold, while a refractory layer is used to protect the phosphor against ion bombardment during discharge of said device.

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patent: 4048533 (1977-09-01), Hinson et al.
patent: 4112332 (1978-09-01), Veith et al.
patent: 4147958 (1979-03-01), Ahearn et al.
patent: 4162427 (1979-07-01), Kamegaya et al.

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