Display device

Patent metadata

Field	Value
Publication number	US-9679919-B2
Application number	US-201514662568-A
Country	US
Kind code	B2
Filing date	Mar 19, 2015
Priority date	Sep 23, 2014
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A display device includes a first substrate having 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 part between the first substrate and the second substrate, the sealing part covering at least a portion of the circuit area, a wiring part in the circuit area of the first substrate and electrically connected to elements in the active area of the first substrate, the wiring part including at least one level-difference compensation part, and a stepped part between the sealing part and at least a portion of the wiring part, the at least one level-difference compensation part of the wiring part being adjacent to the stepped part.

First claim

What is claimed is:

1. A display device, comprising:
a first substrate having an active area, a circuit area extending outwardly along a first direction from the active area, and a cell seal area extending outwardly from the circuit area outwardly along the first direction;
a second substrate covering the first substrate;
a sealing part between the first substrate and the second substrate, the sealing part covering at least a portion of the circuit area;
a wiring part in the circuit area of the first substrate and electrically connected to elements in the active area of the first substrate, the wiring part including at least one level-difference compensation part that extends in a second direction, orthogonal to the first direction; and
a stepped part between the sealing part and at least a portion of the wiring part along the second direction, the at least one level-difference compensation part of the wiring part overlapping the stepped part along the second direction and extending beyond the stepped part along the first direction towards the cell seal area.

2. The display device as claimed in claim 1 , further comprising a dummy metal layer below the at least one level-difference compensation part, the dummy metal layer overlapping the at least one level-difference compensation part.

3. The display device as claimed in claim 2 , further comprising an insulating layer between the wiring part and the dummy metal layer.

4. The display device as claimed in claim 1 , wherein the stepped part is a pixel-defining layer or a planarization layer.

5. The display device as claimed in claim 1 , wherein a width of the at least one level-difference compensation parts is about 50 μm or less.

6. The display device as claimed in claim 1 , wherein the at least one level-difference compensation part includes a plurality of level-difference compensation parts disposed in a line with a predetermined spacing.

7. The display device as claimed in claim 1 , further comprising a plurality of protrusion parts on the at least one level-difference compensation part.

8. The display device as claimed in claim 1 , wherein the wiring part is a circuit wiring or a power wiring.

9. The display device as claimed in claim 1 , wherein the at least one level-difference compensation part of the wiring part protrudes above peripheral portions of the wiring part toward the stepped part.

10. The display device as claimed in claim 1 , wherein a distance between a top of the stepped part and a top of the at least one level-difference compensation part is smaller than a difference between the top of the stepped part and a top of a peripheral portion of the wiring part.

11. The display device as claimed in claim 1 , wherein the at least one level-difference compensation part includes a plurality of level-difference compensation parts stacked on top of each other.

12. The display device as claimed in claim 11 , further comprising:
a first dummy metal layer below a first level-difference compensation part, the first dummy metal layer overlapping the first level-difference compensation part; and
a second dummy metal layer below a second level-difference compensation part, the second level-difference compensation part being on the first level-difference compensation part, and the second dummy metal layer overlapping the second level-difference compensation part.

13. A display device, comprising:
a first substrate having an active area, a circuit area extending outwardly along a first direction from the active area, and a cell seal area extending outwardly from the circuit area outwardly along the first direction;
a second substrate covering the first substrate;
a sealing part between the first substrate and the second substrate, the sealing part covering at least a portion of the circuit area;
a wiring part in the circuit area of the first substrate and electrically connected to elements in the active area of the first substrate, the wiring part including at least one level-difference compensation part that extends in a second direction, orthogonal to the first direction; and
a stepped part between the sealing part and at least a portion of the wiring part along the second direction, the plurality of level-difference compensation parts of the wiring part being adjacent to the stepped part overlapping the stepped part along the second direction and extending beyond the stepped part along the first direction towards the cell seal area.

14. The display device as claimed in claim 13 , wherein:
the plurality of level-difference compensation parts include a first level-difference compensation part and a second level-difference compensation part disposed on the first level-difference compensation part, and
the display device further comprises:
a first dummy metal layer below the first level-difference compensation part, the first dummy metal layer overlapping the first level-difference compensation part, and
a second dummy metal layer below the second level-difference compensation part, the second dummy metal layer overlapping the second level-difference compensation part.

15. The display device as claimed in claim 14 , further comprising:
a first insulating layer between the wiring part and the first dummy metal layer; and
a second insulating layer between the first insulating layer and the second dummy metal layer.

16. The display device as claimed in claim 14 , wherein a width of the first level-difference compensation part is about 50 μm or less.

17. The display device as claimed in claim 13 , wherein the stepped part is a pixel-defining layer or a planarization layer.

18. The display device as claimed in claim 13 , wherein each of the plurality of level-difference compensation parts includes an uneven part.

19. The display device as claimed in claim 13 , wherein the wiring part is a circuit wiring or a power wiring.

20. The display device as claimed in claim 1 , wherein the sealing part directly contacts the stepped part and the wiring part.

Assignees

• Samsung Display Co Ltd

Inventors

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

Classifications

• H10K59/88

  Dummy elements, i.e. elements having non-functional features · CPC title

• H10K50/8428

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

• H10K59/1201

  Manufacture or treatment · CPC title

• H10D86/60

  wherein the TFTs are in active matrices · CPC title

• H10K59/122

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