Ultra violet initiated gas discharge visual display matrix

Details Ultra violet initiated gas discharge visual display matrix Ultra violet initiated gas discharge visual display matrix

1977-09-19

1979-11-27

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

Radiant energy responsive load device

315153, 315155, 3151694, 340706, 365116, H05B 4100, H01J 6102, G11C 1128

Patent

active

041762975

ABSTRACT:
A large area visual display matrix of ultra-violet initiated individual small gas discharge elements. Each element remains in a discharge condition until the voltage applied to a common anode is turned off and for this reason the matrix requires no associated memory or storage property to remain on as long as information is to be displayed. The matrix generally comprises, in order, an electrically conductive cathode with a low work function material photo-emissive coated thereon which emits electrons when irradiated by U.V. light, an insulating medium with apertures therein, individual anodes with holes therein the holes being axially aligned with the apertures in the insulating medium, a voltage supply for each anode, the foregoing elements being sandwiched between a base and a U.V. permeable cover, and a suitable gas filling for the apertures. A source of U.V. light is directed at the portion of the visual display it is desired to illuminate.

REFERENCES:
patent: 2876374 (1959-03-01), Riggen
patent: 3800296 (1974-03-01), Weber
patent: 3826949 (1974-07-01), Nakamura et al.
Zarowin, U.V. Laser Write-In for Plasma Display Panel, IBM Technical Disclosure Bulletin, vol. 18, No. 4, Sep. 1975, p. 1248.

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