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AssigneePlanar Systems, Inc.
InventorsSey-Shing Sun, Jim Kane, P. Niel Yocom
Estimating the term…
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.
A light emitting phosphor material that primarily emits light in the blue region of the visible light spectrum for an alternating current thin-film electroluminescent device that includes said phosphor material sandwiched between a pair of dielectric layers suitable to substantially prevent DC current from flowing therebetween, where said phosphor material has the formula M.sup.II S:D,H,F wherein M.sup.II is strontium, S is sulphur, D is copper, H is iodine, and F is taken from the group gallium, wherein the doping concentration of copper is between 0.05 and 5 mol, the doping concentration of iodine is between 0.05 and 5 mol and the doping concentration of gallion is between 0.5 and 10 mol.
An alternating current thin-film electroluminescent device comprising front and rear sets of electrodes sandwiching a pair of insulators, said pair of insulators sandwiching thin film electroluminescent phosphor material therebetween suitable to substantially prevent DC current from flowing therebetween, said phosphor material primarily emitting light in the blue region of the visible light spectrum comprising a thin film layer having the formula M.sup.II S:D, H, F where M.sup.II is strontium, S is sulphur, D is copper, H is iodine, and F is gallium, wherein the dopant concentrations are:
Dependencies are inferred from the claim text.