Organic electroluminescent element

Details Organic electroluminescent element Organic electroluminescent element

1997-07-17

1999-09-07

Day, Michael

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

313506, 313510, H05B 3314

Patent

active

059491868

ABSTRACT:
An organic EL element includes a light-permeable anode (2), an organic emitting layer (3), a cathode (5), and a light permeable substrate(1), wherein the organic EL element emits light at a predetermined region upon application of a current between the anode (2) and the cathode (5). The element further includes an electron injection layer (4) formed between the emitting layer (3) and the cathode (5) and having a pattern corresponding to the predetermined region to be displayed. Alternatively, the element further includes an electron obstruction layer (12) formed between the emitting layer (11) and the cathode (13) and having a pattern to restrict emission corresponding to the predetermined region not to be displayed. Alternatively, the element further includes a hole injection layer (18) formed between the anode (2) and the emitting layer (19) having a pattern corresponding to the predetermined region to be displayed. Alternatively, the element further includes a hole obstruction layer (24) formed between the anode (2) and the emitting layer (19) having a pattern to restrict emission corresponding to the predetermined region not to be displayed.

REFERENCES:
patent: 5399936 (1995-03-01), Namiki et al.
patent: 5429884 (1995-07-01), Namiki et al.
patent: 5457565 (1995-10-01), Namiki et al.
patent: 5684365 (1997-11-01), Tang et al.
patent: 5731661 (1998-03-01), So et al.

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