Organic light emitting display including transparent cathode
AssigneeSamsung Electronics Co., Ltd.
InventorsYoung-gu Lee, Tae-sik Oh, Sung-kee Kang, Ho-nyeon Lee
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Abstract
A top emission type organic light emitting display includes an organic light emitting diode in which an anode, a light emitting layer and a transparent cathode are successively deposited. The cathode has a sandwiched structure in which a transparent oxide layer is inserted between the metal layers. Exemplary embodiments of the cathode of the present invention have better electric conductivity than a conventional cathode of an organic light emitting diode device, and thus has lower power consumption than a conventional top emission organic light emitting display with similar light transmission.
Claims21
An organic light emitting display having a top emission characteristic, the display comprising:
- an organic light emitting diode comprising:
- an anode;
- a light emitting layer that is disposed on the anode and generates light;
- and
- a cathode that is disposed on the light emitting layer, transmits the light produced by the light emitting layer through the cathode and comprises at least one sandwiched structure comprising a transparent oxide layer interposed between metal layers.
An organic light emitting display having a top emission characteristic, the display comprising:
- a TFT, the TFT comprising:
- a substrate;
- a gate electrode on the substrate;
- a source region and a drain region;
- an organic semiconductor area on the gate electrode and source and drain regions;
- and
- a via hole through the organic semiconductor area contacting the drain region;
- and
- an organic light emitting diode, the organic light emitting diode comprising:
- an anode;
- a light emitting layer that is disposed on the anode and generates light;
- and
- a cathode that is disposed on the light emitting layer, transmits the light produced by the light emitting layer through the cathode and comprises at least one sandwiched structure comprising a transparent oxide layer interposed between metal layers,
- wherein the via hole electrically connects the anode and the drain region.
A method of forming an organic light emitting display having a top emission characteristic, the method comprising:
- forming an organic light emitting diode having an anode;
- disposing a light emitting layer that generates light on the anode;
- and
- disposing a cathode on the light emitting layer, the cathode transmits the light produced by the light emitting layer through the cathode and comprises at least one sandwiched structure comprising a transparent oxide layer interposed between metal layers.
Dependencies are inferred from the claim text.