Electroluminescent apparatus having a structured luminescence conversion layer
View Patent ↗An apparatus such as a light source is disclosed which has an OLED device and a structured luminescence conversion layer disposed on the substrate or transparent electrode of said OLED device and on the exterior of said OLED device. The structured luminescence conversion layer contains color-changing and non-color-changing regions arranged in a particular pattern.
1. An electroluminescent apparatus, comprising:
a light source comprising a transparent layer capable of at least partially transmitting light out from said light source; and
a structured luminescence conversion layer disposed over said transparent layer and on the exterior of said light source, said structured luminescence conversion layer comprising color-changing regions and non-color-changing regions, said color-changing regions absorbing a first spectrum of light from said light source and emitting a second spectrum of light, said non-color-changing regions allowing the light to pass through as a non-absorbed spectrum of light, the second spectrum of light combining with the non-absorbed spectrum of light to give a total output spectrum of light for said electroluminescent apparatus;
wherein the luminescence conversion layer is structured in a cross-striped, circular or square-checkered pattern.
2. The apparatus of claim 1 wherein said non-color-changing regions are void of material.
3. The apparatus of claim 1 wherein said structured luminescence conversion layer comprises of at least one dye.
4. The apparatus of claim 3 wherein said dye is fluorescent.
5. The apparatus of claim 3 wherein said dye is organic.
6. The apparatus of claim 3 wherein said dye is phosphorescent.
7. The apparatus of claim 1 wherein said structured luminescence conversion layer comprises a transparent matrix material.
8. The apparatus of claim 7 wherein said transparent matrix material is at least one of silicone, epoxy, polymethylmethacrylate and polycarbonate.
9. The apparatus of claim 1 wherein said luminescence conversion layer is attached physically and/or chemically to said transparent layer.
10. The apparatus of claim 1 wherein said device is part of light source application.
11. The apparatus of claim 1 wherein said light source is an OLED device.
12. The apparatus of claim 1 wherein said transparent layer is an anode layer of said light source.
13. The apparatus of claim 1 wherein said transparent layer is a substrate.
14. The apparatus of claim 1 wherein said non-color-changing regions comprise a non-absorbing, light transmissive material.
15. The apparatus of claim 14 wherein said non-color-changing regions comprise of at least one of: glass, polycarbonate, or polymethylmethacrylate.
16. The apparatus of claim 1 wherein the ratio of the total area of all said color-changing regions to the total area of all said non-color-changing regions affects said total output spectrum of said apparatus.
17. The apparatus of claim 1 wherein said color-changing regions include at least one of an organic dye, an inorganic dye, perylene, coumarin, a cerium doped garnet, a nitride phosphor, an ionic phospor, a fluorescent dye, quantum dots or a conjugated polymer.
18. An electroluminescent apparatus, comprising:
a light source comprising a transparent layer capable of at least partially transmitting light out from said light source; and
a structured luminescence conversion layer disposed over said transparent layer and on the exterior of said light source, said structured luminescence conversion layer comprising color-changing regions and non-color-changing regions, said color-changing regions absorbing a first spectrum of light from said light source and emitting a second spectrum of light, said non-color-changing regions allowing the light to pass through as a non-absorbed spectrum of light, the second spectrum of light combining with the non-absorbed spectrum of light to give a total output spectrum of light for said electroluminescent apparatus, wherein a first color changing region has a thickness different from a thickness of a second color-changing region of the color-changing regions or wherein a thickness of a first color changing region of the color changing regions varies within the first color-changing region.
19. An electroluminescent apparatus, comprising:
a light source comprising a transparent layer capable of at least partially transmitting light out from said light source; and
a structured luminescence conversion layer disposed over said transparent layer and on the exterior of said light source, said structured luminescence conversion layer comprising color-changing regions and non-color-changing regions, said color-changing regions absorbing a first spectrum of light from said light source and emitting a second spectrum of light, said non-color-changing regions allowing the light to pass through as a non-absorbed spectrum of light, the second spectrum of light combining with the non-absorbed spectrum of light from to give a total output spectrum of light for said electroluminescent apparatus, wherein the non-color-changing region of the structured luminescence conversion layer includes glass.