Optical interference, electroluminescent device having low reflectance
First Claim
1. An optical interference, electroluminescent device having low reflectance, comprising:
- (a) an electroluminescence transmitting, electro-optical, front electrode, comprising at least one layer,(b) an electro-optical counter electrode, disposed to the rear of the front electrode and comprising at least one layer,(c) an electro-optical electroluminescent member, comprising at least one layer, and disposed between the front electrode and the counter electrode, and(d) at least one optical interference member disposed in said electroluminescent device such that at least an optical interference member is in interfacial contact with a front face of the counter electrode, the optical interference member comprising at least one optical interference film which is substantially transparent to ambient light and is of a thickness and material such that the spectral reflectance of said electroluminescent device is so modified that the reflectance of ambient light by the electroluminescent device towards a viewer is reduced.
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Accused Products
Abstract
An optical interference electroluminescent device having low reflectance comprises three layers forming an electroluminescent transparent front electrode, a counter electrode and an electroluminescent layer between the electrodes, with or without dielectric layers between them, and at least one optical interference film layer sandwiched between two of the layers or at the faces of the electrodes. The optical interference layer comprises at least one transparent optical interference film and is in interfacial contact with a layer so that the reflectance of ambient light by the device is reduced by optical interference at the interfaces between the layers and the film(s). The optical interference layer(s) may include at least one partially absorbing film. The device may have arrays of electrodes forming pixels.
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Citations
15 Claims
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1. An optical interference, electroluminescent device having low reflectance, comprising:
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(a) an electroluminescence transmitting, electro-optical, front electrode, comprising at least one layer, (b) an electro-optical counter electrode, disposed to the rear of the front electrode and comprising at least one layer, (c) an electro-optical electroluminescent member, comprising at least one layer, and disposed between the front electrode and the counter electrode, and (d) at least one optical interference member disposed in said electroluminescent device such that at least an optical interference member is in interfacial contact with a front face of the counter electrode, the optical interference member comprising at least one optical interference film which is substantially transparent to ambient light and is of a thickness and material such that the spectral reflectance of said electroluminescent device is so modified that the reflectance of ambient light by the electroluminescent device towards a viewer is reduced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification