Optical interference, electroluminescent device having low refle

Details Optical interference, electroluminescent device having low refle Optical interference, electroluminescent device having low refle

1989-09-29

1991-09-17

Yusko, Donald J.

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313506, 313112, 359580, G02B 110, H01J 170, H05B 3322

Patent

active

050497804

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.

REFERENCES:
patent: 4020389 (1977-04-01), Dickson et al.

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