Organic el display device
AssigneeHitachi Display, Ltd.
InventorsMasahiro TANAKA, Toshiyuki MATSUURA, Sukekazu ARATANI, Masao SHIMIZU
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Abstract
The present invention provides a top-emission-type organic EL display device, that is, an organic EL display device which can suppress changes of a threshold voltage and a light emitting start voltage, and the generation of brightness irregularities. The organic EL display device includes lower electrodes arranged on a main surface of an element substrate, a multi-layered organic EL layer arranged on the lower electrodes, and a light transmitting upper electrode arranged on the organic EL layer. A layer in contact with the lower electrode of the organic EL layer forms a hole injection layer constituted of a V2O5 layer.
Claims6
An organic EL display device comprising:
- lower electrodes made of aluminum or aluminum alloy and arranged on a main surface of an element substrate;
- an organic EL layer having the multi-layered structure and arranged on the lower electrodes, the multi-layered organic EL layer having a hole injection layer being in contact with the lower electrodes and formed of a V2O5 layer;
- a light-transmitting upper electrode arranged over the organic EL layer;
- and
- a sealing substrate arranged to face the element substrate in an opposed manner;
- wherein
- light is emitted from an upper electrode side.
Dependencies are inferred from the claim text.