Yellow-emitting phosphor blend for electroluminescent lamps
AssigneeGlobal Tungsten & Powders Corp.
InventorsJudy A. Belinski-Wolfe, Chung Nin Chau, Thomas A. Wolfe
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Abstract
A phosphor blend for an electroluminescent lamp is described that comprises a green-emitting electroluminescent phosphor and a red-emitting photoluminescent phosphor, the blend exhibiting an x color coordinate from 0.220 to 0.350 and a y color coordinate from 0.450 to 0.475 when stimulated by an electric field.
Claims8
A phosphor blend for an electroluminescent lamp, comprising a green-emitting electroluminescent phosphor and a red-emitting photoluminescent phosphor, the blend exhibiting an x color coordinate from 0.220 to 0.350 and a y color coordinate from 0.450 to 0.475 when stimulated by an electric field.
A phosphor blend for an electroluminescent lamp, comprising:
- a green-emitting electroluminescent phosphor and a red-emitting photoluminescent phosphor, the blend exhibiting an x color coordinate from 0.220 to 0.350 and a y color coordinate from 0.450 to 0.475 when stimulated by an electric field;
- the green-emitting electroluminescent phosphor comprising ZnS:Cu,Cl and the red-emitting photoluminescent phosphor being selected from:
- (Sr,Ca)S:Eu;
- or
- (M1−xM′x)Si5N8:Eu where M and M′ are at least one of Ca, Sr, and Ba and 0≦×≦1;
- or
- a combination thereof;
- and
- the green-emitting EL phosphor comprising from 85 to 96 weight percent of the blend and the red-emitting photoluminescent phosphor comprising from 4 to 15 weight percent of the blend.
Dependencies are inferred from the claim text.