Organic el display panel and method of manufacturing organic el display panel

Patent metadata

Field	Value
Publication number	US-10854839-B2
Application number	US-201916254598-A
Country	US
Kind code	B2
Filing date	Jan 23, 2019
Priority date	May 23, 2018
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

An organic electroluminescence (EL) display panel includes a substrate; first electrodes spaced away from each other and arrayed in rows and columns above the substrate; light-emitting layers including organic light-emitting material and disposed above the first electrodes; a second electrode disposed above the light-emitting layers; a first protection layer including resin and disposed above the second electrode but not within an auxiliary region which, in plan view, extends in a column direction between ones of the first electrodes that are adjacent in a row direction across the substrate; a second protection layer including inorganic material and disposed above the first protection layer and the second electrode; and an auxiliary electrode layer extending in the column direction within the auxiliary region and electrically connecting to the second electrode through a contact opening in the first protection layer within the auxiliary region.

First claim

The invention claimed is:

1. An organic electroluminescence (EL) display panel, comprising:
a substrate;
a plurality of first electrodes that are spaced away from each other and are arrayed in rows and columns above the substrate;
a plurality of light-emitting layers that include organic light-emitting material and are disposed above the first electrodes;
a second electrode that is disposed above the light-emitting layers;
a first protection layer that includes resin and is disposed above the second electrode and is not disposed within an auxiliary region which, in plan view, extends in a column direction between ones of the first electrodes that are adjacent in a row direction across the substrate;
a second protection layer that includes inorganic material and is disposed above the first protection layer and the second electrode; and
an auxiliary electrode layer that extends in the column direction within the auxiliary region and is electrically connected to the second electrode through a contact opening in the first protection layer within the auxiliary region.

2. The organic EL display panel of claim 1 , further comprising:
partition walls, wherein
in plan view of the substrate, the partition walls extend in the column direction and are disposed between the auxiliary region and regions where the light-emitting layers are disposed.

3. The organic EL display panel of claim 2 , further comprising:
second partition walls, wherein
the partition walls are first partition walls, and
in plan view of the substrate, the second partition walls extend in the column direction and are disposed between the first partition walls and the auxiliary electrode layer.

4. The organic EL display panel of claim 3 , wherein
the second partition walls have a greater height than the first partition walls.

5. The organic EL display panel of claim 4 , further comprising:
banks extending in the column direction and partitioning the organic light-emitting layers arrayed in the column direction, wherein
the first partition walls and the second partition walls have greater heights than the banks.

6. The organic EL display panel of claim 3 , further comprising:
banks extending in the column direction and partitioning the organic light-emitting layers arrayed in the column direction, wherein
the first partition walls and the second partition walls have greater heights than the banks.

7. The organic EL display panel of claim 2 , further comprising:
banks extending in the column direction and partitioning the organic light-emitting layers arrayed in the column direction, wherein
the partition walls are ones of the banks that are closest to the auxiliary region.

8. The organic EL display panel of claim 7 , wherein
a width of the partition walls in the row direction is greater than a width of the banks, excluding the partition walls, in the row direction.

9. The organic EL display panel of claim 8 , wherein
a distance between the partition walls in the auxiliary region in the row direction is greater than a distance between each pair of adjacent ones of the banks, excluding the partition walls, in the row direction.

10. The organic EL display panel of claim 7 , wherein
a distance between the partition walls in the auxiliary region in the row direction is greater than a distance between each pair of adjacent ones of the banks, excluding the partition walls, in the row direction.

11. The organic EL display panel of claim 1 , further comprising:
an electric charge movement facilitating layer below the second electrode and above the light-emitting layers and the auxiliary region; and
a second auxiliary electrode layer extending in the column direction and electrically contacting a surface of the electric charge movement facilitating layer opposite the second electrode within the auxiliary region, wherein
the auxiliary electrode layer is referred to as a first auxiliary electrode layer.

12. The organic EL display panel of claim 11 , wherein
the second auxiliary electrode layer includes the same material as the first electrodes and is in the same layer as the first electrodes.

13. The organic EL display panel of claim 1 , further comprising:
a third protection layer that includes inorganic material and is disposed between the second electrode and the first protection layer.

14. The organic EL display panel of claim 1 , wherein
the second protection layer is disposed between the auxiliary electrode layer and the first protection layer.

15. A method of manufacturing an organic EL display panel, comprising:
forming a plurality of first electrodes that are spaced away from each other and are arrayed in rows and columns above a substrate;
forming a plurality of light-emitting layers that include organic light-emitting material above the first electrodes;
forming a second electrode above the light-emitting layers;
forming a first protection layer through applying resin material above the second electrode excluding an auxiliary region which, in plan view, extends in a column direction between ones of the first electrodes that are adjacent in a row direction across the substrate;
forming a second protection layer through applying inorganic material above the first protection layer and the second electrode;
forming a contact opening in the second protection layer within the auxiliary region; and
forming an auxiliary electrode layer within the auxiliary region in the column direction, the auxiliary electrode layer electrically connecting to the second electrode through the contact opening.

16. An organic electroluminescence (EL) display panel, comprising:
a substrate;
a plurality of first electrodes arrayed in rows and columns above the substrate, wherein adjacent first electrodes of the plurality of first electrodes are spaced from each other;
a plurality of light-emitting layers, wherein each of the plurality of light-emitting layers is over a corresponding first electrode of the plurality of first electrodes, and each of the plurality of light-emitting layers comprises an organic material;
a second electrode over the plurality of light-emitting layers;
a first protection layer over the second electrode, wherein the first protection layer fails to extend into an auxiliary region which, in plan view, extends in a column direction between the adjacent first electrodes, and the first protection layer comprises a resin;
a second protection layer over the first protection layer and the second electrode, wherein the second protection layer comprises an inorganic material;
an auxiliary electrode layer that extends in the column direction within the auxiliary region and is electrically connected to the second electrode within the auxiliary region;
a plurality of first partition walls between the auxiliary region and a light emitting region, wherein each of the plurality of first partition walls has a first height;
a second partition wall between adjacent first partition walls of the plurality of first partition walls, wherein the second partition wall has a second height different from the first height.

17. The organic EL display of claim 16 , wherein the second height is greater than the first height.

18. The organic EL display of claim 16 , wherein the second protection layer is between the auxiliary electrode layer and the first protection layer.

19. The organic EL display of claim 16 , further comprising a third protection layer, wherein the third protection layer directly contacts the second protection layer in the

Assignees

• Joled Inc

Inventors

• Yamaguchi Jun
• Harada Kenji
• Yada Shuhei

Classifications

• H10K59/1315

  comprising structures specially adapted for lowering the resistance · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K59/80522

  combined with auxiliary electrodes · CPC title

• H10K50/824

  combined with auxiliary electrodes · CPC title

• H10K59/122 Primary

  Pixel-defining structures or layers, e.g. banks · CPC title