Luminescent screen and lamp containing the same

Details Luminescent screen and lamp containing the same Luminescent screen and lamp containing the same

1984-05-07

1985-06-18

Cooper, Jack

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

2523014R, 313486, 428690, C09K 11465, H01J 6142

Patent

active

045243000

ABSTRACT:
A luminescent screen provided with a luminescent layer formed on a carrier, which layer comprises an aluminate and/or a gallate of strontium and/or barium activated by bivalent europium or by trivalent chromium. The aluminate and/or gallate has an orthorhombic crystal structure with a space group P.sub.nnm and has a composition defined by the formula Me.sub.2-x Eu.sub.x A.sub.6-y Cr.sub.y O.sub.11 (Me=Sr, Ba and A-Al, Ga).
An advantageous application of such a luminescent screen is found in low-pressure mercury vapor discharge lamps.

REFERENCES:
patent: 3294699 (1966-12-01), Lange
patent: 3595802 (1971-07-01), Blasse
patent: 3595803 (1971-07-01), Dugger
patent: 4071465 (1978-01-01), Vodoklys
patent: 4161457 (1979-07-01), Takahashi et al.
patent: 4441049 (1984-04-01), Verstegen et al.

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