Organic EL display device having host compound and...

Details Organic EL display device having host compound and... Organic EL display device having host compound and...

2006-04-25

2006-04-25

Vo, Tuyet Thi (Department: 2821)

Active solid-state devices (e.g., transistors, solid-state diode

Incoherent light emitter structure

C257S072000, C257S059000

Reexamination Certificate

active

07034339

ABSTRACT:
In an organic electroluminescence display device (30) comprising an organic EL element (26) having a structure wherein an organic luminescent medium (24) is sandwiched between a top electrode (20) and a bottom electrode (22), and a driving circuit (14) for driving the organic EL element (26), the organic luminescent medium (24) comprises a host compound and a triplet-related luminous compound and the driving circuit (14) applies a electric pulse voltage or pulse current having a frequency of 30 Hz or more and a duty ratio of 1/5 or less. In this way, it is possible to provide an organic EL display device which consumes a low electric power and has a long luminous life span, and a method for driving the same.

REFERENCES:
patent: 6486601 (2002-11-01), Sakai et al.
patent: 2003/0057856 (2003-03-01), Yamauchi et al.
patent: 02-037385 (1990-02-01), None
patent: 03-233891 (1991-10-01), None
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patent: 11-003048 (1999-01-01), None
patent: 11-354284 (1999-12-01), None
patent: 2001-052873 (2001-02-01), None
Japanese Journal of Applied Physics, Dec. 15, 1999, vol. 38, No. 12B, pp. L1502-L1504.

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