Method for fabricating display device including uneven electrode and display device thereof

Patent metadata

Field	Value
Publication number	US-9559329-B2
Application number	US-201514751906-A
Country	US
Kind code	B2
Filing date	Jun 26, 2015
Priority date	Dec 2, 2014
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A display device having an uneven electrode enhances display quality by improving the emission efficiency of the vertically polarized light. The method for fabricating a display device includes forming a thin film transistor on a base substrate, forming a first electrode connected to the thin film transistor, forming a block copolymer layer on the first electrode, patterning the block copolymer layer and forming a uneven first electrode having a plurality of electrode grooves by etching the first electrode exposed by the block copolymer pattern, and forming a light emitting layer on the uneven first electrode.

First claim

What is claimed is:

1. A display device, comprising:
a base substrate; and
a plurality of pixels,
wherein at least one of the pixels comprises:
a thin film transistor disposed on the base substrate;
an uneven first electrode connected to the thin film transistor, the uneven first electrode having a plurality of electrode grooves;
a light emitting layer disposed on the uneven first electrode; and
a second electrode disposed on the light emitting layer,
wherein each of the light emitting layer and the second electrode comprises a plurality of grooves.

2. The display device of claim 1 , wherein the plurality of electrode grooves are defined to be spaced at a first interval from each other in the first direction, and defined to be spaced at a second interval from each other in the second direction crossing the first direction.

3. The display device of claim 2 , wherein each of the first interval and the second interval is from about 150 nm to about 350 nm.

4. The display device of claim 1 , wherein the plurality of electrode grooves have depths that are substantially uniform.

5. The display device of claim 4 , wherein the electrode groove is about 5 nm to about 1,000 nm deep.

6. The display device of claim 1 , wherein the plurality of electrode grooves are defined in a top surface of the uneven first electrode.

7. The display device of claim 1 , wherein the light emitting layer comprises a plurality of protrusions disposed on a bottom surface of the light emitting layer, and the second electrode comprises a plurality of protrusions disposed on a bottom surface of the second electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Hyunshik

Classifications

• H10K59/8793

  Arrangements for polarized light emission (H10K59/8791 takes precedence) · CPC title

• H10K59/80521

  characterised by their shape · CPC title

• H10K59/80515

  characterised by their shape · CPC title

• H10K50/822

  characterised by their shape · CPC title

• H10K59/1201 Primary

  Manufacture or treatment · CPC title