Display apparatus

Patent metadata

Field	Value
Publication number	US-10680044-B2
Application number	US-201514677085-A
Country	US
Kind code	B2
Filing date	Apr 2, 2015
Priority date	Sep 16, 2014
Publication date	Jun 9, 2020
Grant date	Jun 9, 2020

Abstract

A display apparatus includes a first substrate including an active area, a circuit area extending outwardly from the active area, and a cell seal area extending outwardly from the circuit area, a second substrate covering the first substrate, a sealing portion between the first substrate and the second substrate, the sealing portion covering at least a portion of the circuit area, a circuit line in the circuit area of the first substrate and electrically connected to a device in the active area of the first substrate, at least a portion of the sealing portion being on the circuit line, and a pixel definition layer between the sealing portion and the circuit line.

First claim

What is claimed is:

1. A display apparatus, comprising:
a first substrate including an active area, a circuit area extending around the active area, and a cell seal area extending around the circuit area;
a second substrate covering the first substrate;
a sealing portion between the first substrate and the second substrate in the cell seal area and in at least one portion of the circuit area, the sealing portion being outside the active area, and the sealing portion contacting the second substrate;
a thin film transistor in the circuit area, the thin film transistor including an insulating layer between a gate electrode and source/drain electrodes, and the insulating layer extending from the circuit area to the cell seal area;
a circuit line in the circuit area of the first substrate and electrically connected to a device in the active area of the first substrate, at least a portion of the sealing portion being on the circuit line;
a pixel definition layer between the sealing portion and the circuit line; and
a power line in the circuit area connected to an external power source, the power line being between the first substrate and the circuit line, and the circuit line being directly on and electrically connected to the power line, the power line being directly on an uppermost surface of the insulating layer in the circuit area and the pixel definition layer covering a portion of the power line in contact with the circuit line,
wherein a bottom surface of the sealing portion that faces the first substrate directly contacts the pixel definition layer, a second portion of the power line in the circuit area, and the uppermost surface of the insulating layer in the cell seal area.

2. The display apparatus as claimed in claim 1 , further comprising a column portion between the second substrate and a top surface of the pixel definition layer, a topmost portion of the column portion extending to a same height as a topmost surface of the sealing portion.

3. The display apparatus as claimed in claim 2 , wherein the pixel definition layer and the column portion are united together, the pixel definition layer and the column portion directly contacting each other.

4. The display apparatus as claimed in claim 1 , wherein the sealing portion overlaps a top of the thin film transistor, and the insulating layer has a substantially uniform thickness in the circuit area and the cell seal area.

5. The display apparatus as claimed in claim 4 , further comprising:
a planarization layer between the circuit line and the thin film transistor,
wherein the circuit line is a separate element from the thin film transistor, and a portion of the circuit line is between the pixel definition layer and the thin film transistor.

6. The display apparatus as claimed in claim 5 , wherein the pixel definition layer overlaps the thin film transistor.

7. The display apparatus as claimed in claim 6 , further comprising a column portion on the pixel definition layer, the column portion overlapping the thin film transistor.

8. The display apparatus as claimed in claim 5 , further comprising a step portion between the circuit line and the planarization layer.

9. The display apparatus as claimed in claim 8 , wherein the planarization layer and the step portion are united together.

10. The display apparatus as claimed in claim 8 , wherein the step portion is on the thin film transistor.

11. The display apparatus as claimed in claim 8 , wherein the step portion is a protrusion extending above the planarization layer, the circuit line being conformal on the step portion.

12. The display apparatus as claimed in claim 1 , wherein the sealing portion is in direct contact with the second substrate in the cell seal area and in the circuit area, the sealing portion being completely external to the active area and filling a space between the pixel definition layer and the second substrate.

13. The display apparatus as claimed in claim 4 , further comprising a planarization layer completely covering the thin film transistor, the planarization layer electrically separating between the circuit line and source/drain of the thin film transistor.

14. The display apparatus as claimed in claim 4 , wherein the circuit line includes a first segment directly on the power line, and a second segment extending conformally on a planarization layer from the first segment toward the device in the active area, the second segment having a step shape, and the device being an organic light-emitting device.

15. The display apparatus as claimed in claim 1 , wherein the sealing portion is directly on two different surfaces of the pixel definition layer, the sealing portion being on an upper surface of the pixel definition layer and on an upper surface of the circuit line.

16. The display apparatus as claimed in claim 1 , wherein a length of a first portion of the sealing portion in direct contact with the insulating layer in the cell seal area is longer than a length of a second portion of the sealing portion in direct contact with the power line in the circuit area.

17. The display apparatus as claimed in claim 1 , wherein an upper surface of the circuit line overlaps the power line and is in direct contact with the pixel definition layer.

18. The display apparatus as claimed in claim 1 , wherein the sealing portion covers the at least one portion of the circuit area.

19. The display apparatus as claimed in claim 1 , wherein the sealing portion includes frit, and the pixel definition layer includes an organic material.

20. The display apparatus as claimed in claim 1 , wherein the bottom surface of the sealing portion directly contacts the second portion of the power line in the circuit area along a direction orthogonal to a top surface of the first substrate.

21. A display apparatus, comprising:
a first substrate including an active area, a circuit area extending around the active area, and a cell seal area extending around the circuit area;
a second substrate covering the first substrate;
a sealing portion between the first substrate and the second substrate in the cell seal area and in at least one portion of the circuit area, the sealing portion being outside the active area, and the sealing portion contacting the second substrate;
a thin film transistor in the circuit area, the thin film transistor including an insulating layer between a gate electrode and source/drain electrodes, and the insulating layer extending from the circuit area to the cell seal area;
a circuit line in the circuit area of the first substrate and electrically connected to a device in the active area of the first substrate, at least a portion of the sealing portion being on the circuit line;
a pixel definition layer between the sealing portion and the circuit line; and
a power line in the circuit area connected to an external power source, the power line being between the first substrate and the circuit line, and the circuit line being directly on and electrically connected to the power line,
wherein a bottom surface of the sealing portion that faces the first substrate directly contacts the pixel definition layer and the power line in the circuit area and directly contacts an uppermost surface of the insulating layer in the cell seal area, and
wherein the pixel definition layer completely separates the sealing portion from the circuit line, the pixel definition layer being directly between the sealing portion and the circuit line.

22. A display apparatus, compri

Assignees

• Samsung Display Co Ltd

Inventors

• Go Jaekyung
• Na Eunjae
• Jo Minjun
• Choi Hyunjun

Classifications

• H01L27/3276

  Electricity · mapped topic

• H01L51/525

  Electricity · mapped topic

• H01L51/5246

  Electricity · mapped topic

• H01L27/3246 Primary

  Electricity · mapped topic

• H10K59/8723

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