Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Patent
1996-12-02
1999-08-17
Patel, Vip
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
313498, 313483, H05B 3310
Patent
active
059398256
ABSTRACT:
A light emitting phosphor having improved luminance is incorporated into an ACTFEL device having front and rear electrode sets, a pair of insulators sandwiched between the front and rear electrode sets, and a thin film electroluminescent laminar stack which includes a phosphor layer having the formula M.sup.II S:D,H,F where M.sup.II is taken from the group calcium, strontium, barium, and magnesium, S=sulfur, D is taken from the group copper, lead, gold, silver, magnesium, antimony, bismuth and arsenic, H is taken from the group fluorine, chlorine, bromine, and iodine, and F is taken from the group gallium, indium, aluminum, germanium, silicon, lanthanum, scandium, and yttrium. Deep blue and green chromaticity phosphors may be obtained through selection of multiple co-dopants and adjusting their relative concentrations.
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A.K. Uppal, et al., Temperature-dependent Photoluminescence & Phosphorescence Decay in CaS:Cu & CaS:Ce Phosphors Using N.sub.2 -Pulsed Laser Indian Journal of Pure & Applied Physics, vol. 25, Feb. 1987, pp. 72-76.
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Temperature-Dependent Photoluminescence & Phosphorescence Decay In CaS:Cu & CaS:Ce Phosphors Using N.sub.2 -Pulsed Laser, AK Uppal, S.N. Chaturvedi & N. Nath Department of Physics, Kurukshetra University, Kurukshetra, received Nov. 24, 1986.
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Blue-Green Color TFEL Device with Sputtered SrS:Ce Thin Films Hideomi Ohnishi and Tatsuhiko Okuda, Proceedings of the SID, vol. 31/1, 1990.
Alkaline Earth Sulfide Phosphors Activated by Cooper, Silver and Gold Willi Lehmann, Westinghouse Research Laboratories, Pittsburgh, Pa., SSI, Nov. 1970.
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Kane Jim
Sun Sey-Shing
Yocom P. Niel
Gerike Matthew J.
Patel Vip
Planar Systems Inc.
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