Enhancement of luminance and life in electroluminescent devices
AssigneeLite Array, Inc.
InventorPaul Hanlon James Beatty
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Abstract
An electroluminescent device including a first electrode layer, a second electrode layer, and a light-emitting layer disposed between the first and second electrode layers. The light-emitting layer includes a polycrystalline or amorphous material from which light can be trapped by total internal reflection until reaching a region of crystallite size capable of scattering light.
Claims46
An electroluminescent device including a plurality of layers, the device comprising:
- a first electrode layer;
- a second electrode layer;
- a light-emitting layer disposed between the first and second electrode layers;
- and
- at least one crystallite formed in a layer.
A method of fabricating an electroluminescent device that emits light to an observer and wherein the device has a plurality of layers, the method comprising:
- depositing the layers onto a viewing surface;
- and
- thermally treating the layers such that a layer produces a crystalline scattering state.
An electroluminescent device including a plurality of layers, the device comprising:
- a first electrode layer of a substantially non-transparent material;
- a second electrode layer of a substantially non-transparent material;
- and
- a light-emitting layer disposed between the first and second electrode layers.
An electroluminescent device having a plurality of layers deposited on a viewing surface, the device comprising:
- a light-emitting means;
- a light-scattering means for increasing a luminance of the device;
- and
- a conducting means for establishing a voltage across the light-emitting means.
Dependencies are inferred from the claim text.