White-Emitting Phosphor Blend and Electroluminescent Lamp Containing Same
AssigneeOsram Sylvania Inc.
InventorsJudy Belinski-Wolfe, Chung Chau
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Abstract
A white-emitting electroluminescent lamp is provided that uses a phosphor blend comprising a mixture of particles of an electroluminescent phosphor and particles of an europium-activated alkaline earth phosphor having the general formula Sr1-xCaxS:Eu where 0≦x≦1, wherein the electroluminescent phosphor is selected from a blue-emitting electroluminescent phosphor, a blue-green-emitting electroluminescent phosphor, or a combination thereof. A preferred blend contains from about 5% to about 20% by weight of the europium-activated alkaline earth phosphor.
Claims24
An electroluminescent lamp including a phosphor blend comprised of a mixture of particles of an electroluminescent phosphor and particles of an europium-activated alkaline earth phosphor having the general formula Sr1-xCaxS:Eu where 0≦x≦1, the electroluminescent phosphor selected from a blue-emitting electroluminescent phosphor, a blue-green-emitting electroluminescent phosphor, or a combination thereof.
A white-emitting electroluminescent lamp comprising a first transparent electrode, a second electrode, a first dielectric layer, and a second dielectric layer, the first and second dielectric layers being disposed between the electrodes;
- the first dielectric layer being disposed adjacent to the first transparent electrode and having a phosphor blend dispersed in a first dielectric material;
- the second dielectric layer being disposed adjacent to the second electrode and having a ferroelectric material dispersed in a second dielectric material;
- and
- the phosphor blend comprising of a mixture of particles of an electroluminescent phosphor and particles of an europium-activated alkaline earth phosphor having the general formula Sr1-xCaxS:Eu where 0≦x≦1, the electroluminescent phosphor selected from a blue-emitting electroluminescent phosphor, a blue-green-emitting electroluminescent phosphor, or a combination thereof.
A phosphor blend comprising:
- a mixture of particles of an electroluminescent phosphor and particles of an europium-activated alkaline earth phosphor having the general formula Sr1-xCaxS:Eu where 0≦x≦1, the electroluminescent phosphor selected from a blue-emitting electroluminescent phosphor, a blue-green-emitting electroluminescent phosphor, or a combination thereof.
Dependencies are inferred from the claim text.