Display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-11101257-B2
Application number	US-201916544044-A
Country	US
Kind code	B2
Filing date	Aug 19, 2019
Priority date	Aug 21, 2018
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

A display device includes a pixel circuit, an insulating layer covering the pixel circuit, a first partition portion which is disposed on the insulating layer and extends in a first direction, a second partition portion which is spaced apart from the first partition portion in a second direction intersecting the first direction and extends in the first direction, a plurality of connection partition portions disposed between the first and second partition portions, where each of the plurality of connection partition portions extends in the second direction, a first electrode disposed on the first partition portion and electrically connected to the pixel circuit, a second electrode disposed on the second partition portion, and a light emitting element disposed between the plurality of connection partition portions and electrically connected to the first electrode and the second electrode.

First claim

What is claimed is:

1. A display device comprising:
a pixel circuit;
an insulating layer covering the pixel circuit;
a first partition portion which is disposed on the insulating layer and extends in a first direction;
a second partition portion which is spaced apart from the first partition portion in a second direction intersecting the first direction and extends in the first direction;
a plurality of connection partition portions, each connection partition portion spaced apart from each other, disposed between the first and second partition portions, and extending in the second direction;
a first electrode disposed on the first partition portion and electrically connected to the pixel circuit;
a second electrode disposed on the second partition portion; and
a light emitting element having a first side electrically connected to the first electrode, a second side opposite the first side and electrically connected to the second electrode, a third side that connects the first side and the second side as seen from plan view, and a fourth side opposite the third side and that connect the first side and the second side as seen from plan view, wherein
the light emitting element is disposed such that the third side faces a first connection partition portion of the plurality of connection partition portions,
the fourth side faces a second connection partition portion of the plurality of connection partition portions, and
an arrangement position of the light emitting element is controlled by the first and second connection partition portions.

2. The display device of claim 1 , wherein the light emitting element is completely surrounded by the first partition portion, the second partition portion, and the plurality of connection partition portions when viewed in a plan view.

3. The display device of claim 2 , wherein the first partition portion, the second partition portion, and the plurality of connection partition portions include a same material as each other.

4. The display device of claim 2 , wherein
the first electrode extends in the first direction and covers the first partition portion,
the second electrode extends in the first direction and covers the second partition portion, and
a first distance in the second direction between the first and second electrodes in an area adjacent to the plurality of connection partition portions is equal to a second distance in the second direction between the first and second electrodes in an area overlapping with the plurality of connection partition portions when viewed in the plan view.

5. The display device of claim 2 , wherein
the first electrode comprises:
a first extension electrode portion extending in the first direction; and
a first protrusion electrode portion protruding from the first extension electrode portion in a direction toward the second electrode, and

the second electrode comprises:
a second extension electrode portion extending in the first direction; and
a second protrusion electrode portion protruding from the second extension electrode portion in a direction toward the first electrode.

6. The display device of claim 5 , wherein
the first protrusion electrode portion is disposed between the plurality of connection partition portions when viewed in the plan view, and
the second protrusion electrode portion is disposed between the plurality of connection partition portions when viewed in the plan view.

7. The display device of claim 5 , wherein
a first distance in the second direction between the first protrusion electrode portion and the second protrusion electrode portion is less than a second distance in the second direction between the first extension electrode portion and the second extension electrode portion when viewed in the plan view.

8. The display device of claim 1 , wherein
each of the first and second partition portions has a first thickness,
each of the plurality of connection partition portions has a second thickness, and
the first thickness is equal to the second thickness.

9. The display device of claim 1 , wherein
each of the first and second partition portions has a first thickness,
each of the plurality of connection partition portions has a second thickness, and
the first thickness is greater than the second thickness.

10. The display device of claim 1 , wherein each of the plurality of connection partition portions has a trapezoidal shape when viewed in a cross-sectional view parallel to the first direction.

11. The display device of claim 1 , wherein an outermost surface of each of the plurality of connection partition portions has a curvature when viewed in a cross-sectional view parallel to the first direction.

12. The display device of claim 1 , wherein
the plurality of connection partition portions are spaced apart from each other in the first direction, and
the first partition portion, the second partition portion and the plurality of connection partition portions are connected to each other to constitute a single unitary body.

13. A method of manufacturing a display device, the method comprising:
providing a pixel circuit on a base layer;
providing an insulating layer covering the pixel circuit;
providing a preliminary insulating layer on the insulating layer;
patterning the preliminary insulating layer to form a first partition portion, a second partition portion, and a plurality of connection partition portions spaced apart from each other;
providing a first electrode covering the first partition portion;
providing a second electrode covering the second partition portion;
providing a light emitting element between the first electrode and the second electrode and between the plurality of connection partition portions such that the light emitting element has a first side electrically connected to the first electrode, a second side opposite the first side and electrically connected to the second electrode, a third side that connects the first side and the second side as seen from plan view, and a fourth side opposite the third side that connect the first side and the second side as seen from plan view; and
aligning the light emitting element such that the third side faces a first connection partition portion of the plurality of connection partition portions as seen from plan view, and the fourth side faces a second connection partition portion of the plurality of connection partition portions as seen from plan view, wherein an arrangement position of the light emitting element is controlled by the first and second connection partition portions.

14. The method of claim 13 , wherein the patterning the preliminary insulating layer comprises:
disposing a mask over the preliminary insulating layer; and
exposing and developing the preliminary insulating layer using the mask to form the first partition portion, the second partition portion, and the plurality of connection partition portions.

15. The method of claim 14 , wherein
the mask includes a light blocking portion and a light transmitting portion, and
the disposing the mask over the preliminary insulating layer comprises
disposing the mask in a way such that the light blocking portion is disposed to overlap an area in which the first and second partition portions and the plurality of connection partition portions are to be formed.

16. The method of claim 14 , wherein
the mask includes a light blocking portion, a light transmitting portion, and a light semi-transmitting portion, and
the disposing the mask over the preliminary insulating layer comprises disposing the mask in a way such that th

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Sikwang
• Ko Minsuk
• Kim Taegyun
• Yang Yong-Hoon

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H20/857

  Interconnections, e.g. lead-frames, bond wires or solder balls · CPC title

• H10H20/831

  characterised by their shape · CPC title

• H10H29/142 Primary

  Two-dimensional arrangements, e.g. asymmetric LED layout · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title