Display apparatus and multi-screen display apparatus including the same

Patent metadata

Field	Value
Publication number	US-12284864-B2
Application number	US-202117552034-A
Country	US
Kind code	B2
Filing date	Dec 15, 2021
Priority date	Dec 17, 2020
Publication date	Apr 22, 2025
Grant date	Apr 22, 2025

Abstract

A light emitting display apparatus may include a display portion including a plurality of pixel areas disposed on a substrate, a circuit layer including a plurality of pixel driving lines disposed in the plurality of pixel areas, a light emitting device layer including a light emitting layer disposed on the circuit layer in the plurality of pixel areas, an encapsulation layer disposed on the light emitting device layer, and a routing portion surrounding a front periphery portion and an outer surface of the substrate and including a plurality of routing lines which pass through the encapsulation layer disposed at the front periphery portion of the substrate to be connected to the plurality of pixel driving lines.

First claim

The invention claimed is:

1. A display apparatus comprising:
a substrate including a periphery portion adjacent to outer surfaces of the substrate, at least one of the outer surfaces including an outermost surface of the substrate;
a plurality of pixels on the substrate defining a display area;
a plurality of signal lines coupled to the plurality of pixels;
a light emitting device layer included in each of the plurality of pixels;
an encapsulation layer on the light emitting device layer; and
a plurality of routing lines extending to the periphery portion and at least partially covering the outermost surface of the substrate,
wherein at least one of the plurality of routing lines extends through a routing contact hole provided in the encapsulation layer.

2. The display apparatus of claim 1 , wherein the periphery portion is located within the display area.

3. The display apparatus of claim 1 , wherein the encapsulation layer and at least one of the plurality of routing lines overlap with each other at the periphery portion.

4. The display apparatus of claim 1 , wherein at least one of the plurality of routing lines is on and contacting the outer surface of the substrate.

5. The display apparatus of claim 1 , wherein at least one of the plurality of routing lines is extending through the encapsulation layer disposed at the periphery portion of the substrate.

6. The display apparatus of claim 1 , further comprising a discontinuity wall in the periphery portion of the substrate to disconnect the light emitting device layer,
wherein the encapsulation layer is on the discontinuity wall, and
wherein at least one of the plurality of routing lines extends into the encapsulation layer and the discontinuity wall.

7. The display apparatus of claim 1 , further comprising a discontinuity wall in the periphery portion of the substrate to disconnect the light emitting device layer, and a dam portion adjacent to the discontinuity wall in the periphery portion of the substrate,
wherein the dam portion has a height different from the discontinuity wall, and
wherein at least one of the plurality of routing lines extends into the encapsulation layer and the dam portion.

8. The display apparatus of claim 7 , wherein the encapsulation layer includes:
a first encapsulation layer disposed on the light emitting device layer and the dam portion; and
a second encapsulation layer disposed on the first encapsulation layer and not extending beyond the dam portion,
wherein the plurality of routing lines overlap with the second encapsulation layer.

9. The display apparatus of claim 6 , further comprising a plurality of auxiliary lines adjacent to the plurality of routing lines, the plurality of auxiliary lines including:
a first conductive structure overlapping the discontinuity wall,
wherein the first conductive structure is electrically coupled to the plurality of routing lines.

10. The display apparatus of claim 9 , wherein the plurality of auxiliary lines further includes:
a second conductive structure on the first conductive structure, the second conductive structure overlapping the discontinuity wall,
wherein the second conductive structure is electrically coupled to the plurality of routing lines.

11. A multi-screen display apparatus comprising:
a plurality of display devices disposed along at least one direction of a first direction and a second direction transverse to the first direction,
wherein each of the plurality of display devices includes the display apparatus of claim 1 .

12. The multi-screen display apparatus of claim 11 , wherein, in each of the plurality of display devices, the plurality of pixels are arranged at a pixel pitch in the first direction and the second direction,
wherein the pixel pitch is a distance between a center of pixels adjacent to each other in each of the first direction and the second direction, and
wherein in a first display device and a second display device adjacent to each other in each of the first direction and the second direction, a distance between a center portion of an outermost pixel of the first display device and a center portion of an outermost pixel of the second display device is less than or equal to the pixel pitch.

13. A display apparatus comprising:
a first substrate having a first surface adjacent to an edge of the first substrate;
a second substrate facing the first substrate, the second substrate having a second surface adjacent to an edge of the second substrate, the second surface and the first surface being adjacent to each other;
a plurality of pixels on the first substrate;
a plurality of signal lines coupled to the plurality of pixels;
a light emitting device layer on each of the plurality of pixels and the edge of the first substrate;
an encapsulation layer on the light emitting device layer,
a plurality of routing lines extending from the first substrate, at least one of the plurality of routing lines extending over the first surface of the first substrate and the second surface of the second substrate forming an electrical connection between the first substrate and the second substrate,
wherein the plurality of routing lines is adjacent to the edge of the first substrate and on the encapsulation layer.

14. The display apparatus of claim 13 , wherein the plurality of pixels on the first substrate defines a display area which extends to the edge of the first substrate.

15. The display apparatus of claim 13 , further comprising a contact pattern portion on the first substrate adjacent to an outermost pixel of the plurality of pixels, the contact pattern portion electrically coupled to the plurality of signal lines, wherein at least one routing line among the plurality of routing lines extends through the encapsulation layer to couple to the contact pattern portion.

16. The display apparatus of claim 15 , further comprising a discontinuity wall adjacent to the edge of the first substrate to disconnect the light emitting device layer, the discontinuity wall being on the contact pattern portion, wherein the at least one routing line among the plurality of routing lines extends through the encapsulation layer and the discontinuity wall to couple to the contact pattern portion.

17. The display apparatus of claim 16 , further comprising a dam adjacent to the discontinuity wall, the dam having a higher height than the discontinuity wall, wherein the at least one routing line among the plurality of routing lines extends through the encapsulation layer and the dam to couple to the contact pattern portion.

18. The display apparatus of claim 17 , further comprising a first auxiliary conductive structure on the contact pattern portion, the first auxiliary conductive structure overlapping a location of either the discontinuity wall or the dam, wherein the at least one routing line among the plurality of routing lines extends through the encapsulation layer to couple to the first auxiliary conductive structure.

19. The display apparatus of claim 18 , further comprising a second auxiliary conductive structure on the contact pattern portion, the second auxiliary conductive structure being on the first auxiliary conductive structure and overlapping a location of either the discontinuity wall or the dam, wherein the at least one routing line among the plurality of routing lines extends through the encapsulation layer to couple to the first and second auxiliary conductive structures.

Assignees

• Lg Display Co Ltd

Inventors

• Jang Youngin
• Kim Kyungmin
• Park Eunji

Classifications

• H10W90/00

  Package configurations · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K59/124

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10K59/122

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