Organic electroluminescence display and its driving method
AssigneeIdemitsu Kosan Co., Ltd.
InventorsMasahide Matsuura, Chishio Hosokawa
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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.
Claims11
An organic electroluminescence display device, comprising:
- an organic electroluminescence element having a structure wherein an organic luminescent medium comprising a host compound and a phosphorescent luminous compound is sandwiched between a top electrode and a bottom electrode;
- and
- a driving circuit for applying a electric pulse current or pulse voltage having a frequency of 30 Hz or more and a duty ratio of 1/5 or less so as to drive the organic electroluminescence element.
A method for driving an organic electroluminescence display device comprising an organic electroluminescence element having a structure wherein an organic luminescent medium is sandwiched between a top electrode and a bottom electrode, comprising:
- applying a electric pulse current or pulse voltage having a frequency of 30 Hz or more and a duty ratio of 1/5 or less by a driving circuit, so as to drive the organic electroluminescence element.
Dependencies are inferred from the claim text.