Organic light emitting diode display and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2016233285-A1
Application number	US-201514849986-A
Country	US
Kind code	A1
Filing date	Sep 10, 2015
Priority date	Feb 5, 2015
Publication date	Aug 11, 2016
Grant date	—

Abstract

An organic light emitting diode display includes a substrate, switching elements on the substrate, at least one barrier member on the substrate, a passivation layer covering the switching elements and including a protection opening exposing the barrier member, pixel electrodes on the passivation layer and connected to the switching elements, auxiliary electrodes separated from and formed from a same layer as the pixel electrodes, an organic emission layer including a pixel emission layer and a common emission layer sequentially formed on the pixel electrodes, and a common electrode including an auxiliary common electrode and a main common electrode sequentially formed on the common emission layer. The common emission layer and the auxiliary common electrode have a common contact hole at a position corresponding to a position of the barrier member. The main common electrode is connected with the auxiliary electrode through the common contact hole.

First claim

What is claimed is:

1 . An organic light emitting diode display, comprising:
a substrate; a plurality of switching elements on the substrate; at least one barrier member on the substrate; a passivation layer covering the plurality of switching elements, the passivation layer including a protection opening exposing the barrier member; a plurality of pixel electrodes on the passivation layer, the pixel electrodes being connected to the switching elements; a plurality of auxiliary electrodes separated from and formed from a same layer as the plurality of pixel electrodes; an organic emission layer including a pixel emission layer and a common emission layer sequentially formed on the plurality of pixel electrodes; and a common electrode including an auxiliary common electrode and a main common electrode sequentially formed on the common emission layer, wherein the common emission layer and the auxiliary common electrode have a common contact hole at a position corresponding to a position of the barrier member, and the main common electrode is connected with an auxiliary electrode of the plurality of auxiliary electrodes through the common contact hole.

2 . The organic light emitting diode display as claimed in claim 1 , wherein:
the substrate includes a plurality of pixel areas and a plurality of pixel edge areas between the plurality of pixel areas, and the barrier member, the protection opening, and the auxiliary electrode are located at a pixel edge area of the plurality of pixel edge areas.

3 . The organic light emitting diode display as claimed in claim 2 , wherein:
the auxiliary electrode includes a first auxiliary electrode and a second auxiliary electrode separated from each other, the first auxiliary electrode and the second auxiliary electrode including ends that face each other.

4 . The organic light emitting diode display as claimed in claim 3 , wherein:
the auxiliary electrode overlaps the barrier member.

5 . The organic light emitting diode display as claimed in claim 3 , wherein:
the barrier member is positioned between the first auxiliary electrode and the second auxiliary electrode.

6 . The organic light emitting diode display as claimed in claim 5 , wherein:
the barrier member is exposed through the protection opening and the common contact hole, and the main common electrode is connected with the barrier member.

7 . The organic light emitting diode display as claimed in claim 3 , further comprising:
a pixel definition layer covering a pixel electrode of the plurality of pixel electrodes and the auxiliary electrode, the pixel definition layer including an auxiliary opening exposing a portion of the auxiliary electrode, and the barrier member is positioned at the auxiliary opening.

8 . The organic light emitting diode display as claimed in claim 7 , wherein:
the main common electrode is connected with the auxiliary electrode exposed through the auxiliary opening and the common contact hole.

9 . The organic light emitting diode display as claimed in claim 8 , wherein the auxiliary electrode exposed through the auxiliary opening is connected with the common emission layer.

10 . The organic light emitting diode display as claimed in claim 1 , further comprising:
a scan line formed on the substrate and transmitting a scan signal to a switching element of the plurality of switching elements; and a data line crossing the scan line and transmitting a data signal to the switching element, and wherein, the barrier member includes a first barrier member formed from a same layer as the scan line, and a second barrier member overlapping the first barrier member and formed from a same layer as the data line.

11 . The organic light emitting diode display as claimed in claim 10 , wherein the switching element includes:
a switching transistor connected to the scan line and the data line, and a driving transistor connected to the switching transistor.

12 . The organic light emitting diode display as claimed in claim 10 , further comprising:
a third barrier member between the first barrier member and the second barrier member, the third barrier member overlapping the first barrier member and the second barrier member.

13 . A method for manufacturing an organic light emitting diode display, the method comprising:
forming a plurality of switching elements and at least one barrier member on a substrate; forming a passivation layer covering a plurality of switching elements the passivation layer including a protection opening exposing the barrier member; forming a plurality of pixel electrodes on the passivation layer, a pixel electrode of the plurality of pixel electrodes being connected to a switching element of the plurality of switching elements; forming a plurality of auxiliary electrodes spaced apart from the plurality of pixel electrodes on the passivation layer, an auxiliary electrode of the plurality of auxiliary electrodes including a first auxiliary electrode and a second auxiliary electrode; forming an organic emission layer sequentially including a pixel emission layer and a common emission layer on the plurality of pixel electrodes; forming an auxiliary common electrode on the common emission layer; forming a common contact hole through the common emission layer and the auxiliary common electrode, the common contact hole exposing a portion of the auxiliary electrode; and forming a main common electrode on the auxiliary common electrode, the main common electrode being connected with the auxiliary electrode through the common contact hole.

14 . The method as claimed in claim 13 , wherein:
the first auxiliary electrode is formed to be electrically separated from the second auxiliary electrode, and forming the common contact hole includes applying a breakdown voltage between the first auxiliary electrode and the second auxiliary electrode to enable removal of the common emission layer and the auxiliary common electrode on the barrier member.

15 . The method as claimed in claim 13 , wherein
the first auxiliary electrode and the second auxiliary electrode are formed to be equipotentially connected, and forming the common contact hole includes applying breakdown voltage between the auxiliary electrode and the auxiliary common electrode to enable removal the common emission layer and the auxiliary common electrode on the barrier member.

16 . The method as claimed in claim 13 , wherein
the substrate includes a plurality of pixel areas and a plurality of pixel edge areas formed between a plurality of pixel areas, and the barrier member, the protection opening, and the auxiliary electrode are formed at the pixel edge area.

17 . The method as claimed in claim 13 , wherein:
the barrier member and the auxiliary electrode are formed to be in an overlapping relationship.

18 . The method as claimed in claim 13 , wherein:
the barrier member is formed between the first auxiliary electrode and the second auxiliary electrode.

19 . The method as claimed in claim 13 , further comprising:
forming a pixel definition layer covering the pixel electrode and the auxiliary electrode and having an auxiliary opening exposing a portion of the auxiliary electrode, wherein the barrier member is positioned at the auxiliary opening.

20 . The method as claimed in claim 19 , wherein:
the main common electrode is connected with the auxiliary electrode exposed through the auxiliary opening and the common contact hole.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Won Kyu

Classifications

• H10K59/80522

  combined with auxiliary electrodes · CPC title

• H10K50/824 Primary

  combined with auxiliary electrodes · CPC title

• H10K59/1315 Primary

  comprising structures specially adapted for lowering the resistance · CPC title

• H01L51/5228

  Electricity · mapped topic

• H01L27/3262

  Electricity · mapped topic