Display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2016268356-A1
Application number	US-201514861904-A
Country	US
Kind code	A1
Filing date	Sep 22, 2015
Priority date	Mar 10, 2015
Publication date	Sep 15, 2016
Grant date	—

Abstract

A display device includes: a first substrate including: a display area including a plurality of pixels, and a peripheral area positioned around the display area; a thin film transistor positioned on the first substrate; a pixel electrode layer positioned on the thin film transistor and including more than one pixel electrodes positioned in the display area; and a pixel definition layer positioned on the pixel electrode layer and including a peripheral portion overlapping a voltage transmission electrode. The peripheral portion includes a spacer and an inclination portion connected to the spacer and positioned at a first side of the spacer, and the inclination portion has a concave inclination surface.

First claim

What is claimed is:

1 . A display device comprising:
a first substrate including:
a display area including a plurality of pixels, and
a peripheral area positioned around the display area;
a thin film transistor positioned on the first substrate; a pixel electrode layer positioned on the thin film transistor and including a plurality of pixel electrodes positioned in the display area; and a pixel definition layer positioned on the pixel electrode layer and including a peripheral portion overlapping a voltage transmission electrode, wherein the peripheral portion includes:
a spacer, and
an inclination portion connected to the spacer and positioned at a first side of the spacer, wherein the inclination portion has a concave inclination surface.

2 . The display device of claim 1 , wherein
the peripheral portion further includes a main portion connected to the spacer and positioned at a second side opposite to the first side of the spacer.

3 . The display device of claim 2 , further comprising:
a second substrate facing the first substrate; and a sealant formed between the first substrate and the second substrate and positioned in the peripheral area, wherein the main portion is positioned at a side facing the sealant.

4 . The display device of claim 3 , wherein
a height of a top surface of the spacer with respect to the first substrate is higher than a height of a top surface of the main portion and the inclination portion.

5 . The display device of claim 4 , wherein
a thickness of the inclination portion is smaller than a thickness of the main portion.

6 . The display device of claim 5 , wherein
a height of a bottom surface of the main portion is lower than a height of a bottom surface of the inclination portion.

7 . The display device of claim 6 , further comprising:
a voltage transmission line positioned in the peripheral area and transmitting a common voltage; and a passivation layer positioned between the thin film transistor and the pixel electrode layer, wherein the passivation layer includes an edge side surface exposing the voltage transmission line, and the voltage transmission electrode positioned in the peripheral area includes a first portion covering the edge side surface of the passivation layer and a second portion connected to the voltage transmission line.

8 . The display device of claim 7 , wherein
the spacer includes at least one part covering the edge side surface of the passivation layer, and the pixel electrode layer includes the voltage transmission electrode.

9 . The display device of claim 4 , wherein
the peripheral portion covers an edge of the voltage transmission electrode.

10 . The display device of claim 1 , wherein
an edge of the spacer at the first side has a shape of protrusions and depressions and includes recess portions and convex portions that are alternately arranged.

11 . The display device of claim 10 , wherein
the inclination portion includes a plurality of portions positioned in the recess portions in a plan view, and each of the plurality of portions included in the inclination portion has a concave inclination surface.

12 . The display device of claim 11 , wherein
the voltage transmission electrode includes a plurality of holes, and each of the plurality of the portions of the inclination portion respectively overlaps each of the holes.

13 . The display device of claim 12 , wherein
a hole adjacent to a first hole overlapping the inclination portion among the plurality of holes is disposed to be aligned with the first hole.

14 . The display device of claim 12 , wherein
a hole adjacent a first hole overlapping the inclination portion among the plurality of holes is disposed to be shifted from the first hole.

15 . The display device of claim 10 , wherein
an edge of the spacer at the first side having the protrusions and depressions shape includes a first convex portion and a second convex portion having different lengths from each other.

16 . The display device of claim 1 , wherein
the spacer and the inclination portion are elongated along an edge side of the first substrate.

17 . The display device of claim 16 , wherein
the voltage transmission electrode includes a plurality of holes, and the inclination portion overlaps the plurality of the holes.

18 . A method for manufacturing a display device, comprising:
forming a thin film transistor on a first substrate including a display area and a peripheral area around the display area; forming, on the thin film transistor, a pixel electrode layer including a plurality of pixel electrodes positioned in the display area; coating a photosensitive material on the pixel electrode layer to form a coating layer; exposing the coating layer by using a photomask including a light transmissive part, a light blocking part, and a semi-transmissive part; developing the exposed coating layer; and hardening the developed coating layer to form a pixel definition layer including a peripheral portion overlapping a voltage transmission electrode, wherein the peripheral portion includes a spacer and an inclination portion connected to the spacer and positioned at a first side of the spacer, and wherein the inclination portion has a concave inclination surface.

19 . The method of claim 18 , wherein the peripheral portion further includes a main portion connected to the spacer and positioned at a second side opposite to the first side of the spacer.

20 . The method of claim 19 , wherein a thickness of the coating layer corresponding to the main portion is thicker than a thickness of the coating layer corresponding to the inclination portion.

Assignees

• Samsung Display Co Ltd

Inventors

• Go Jae Kyung
• Na Eun Jae
• Jo Min Jun
• Choi Hyun-Jun

Classifications

• H10K59/8723 Primary

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• H10K59/123

  Connection of the pixel electrodes to the thin film transistors [TFT] · CPC title

• H10K59/122 Primary

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

• H01L27/3248 Primary

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic