Electroluminescent display device

Details Electroluminescent display device Electroluminescent display device

1996-07-16

1999-05-11

Nold, Charles

Stock material or miscellaneous articles

Composite

Of inorganic material

428917, 303504, 303505, 303506, 303507, 303508, 303509, 303510, 427 66, H05B33/00

Patent

active

059026880

ABSTRACT:
This disclosure provides an electroluminescent ("EL") display device having anode, cathode, insulator and organic EL layers. The anode and cathode layers sandwich the other two layers, and the insulator layer is patterned to selectively block flow of current through the EL layers, and thereby locally block generation of light. The patterned insulator layer allows a single panel to display multiple visual attributes, yet does not require electrode patterning. The patterned insulator can be fabricated using photoresist exposure and development procedures. The photoresist is laid on top of a commercially available substrate/electrode layered pair, and is developed to create an assembly that can be completed in a single vacuum deposition process. By etching a small region of the electrode from the commercially available layered pair, and by choosing a deposition frame that blocks deposition on a second, different small region, electrical terminals may be coupled to the panel with a reduced risk of an electrical short.

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