Display apparatus having a light-emitting device

Patent metadata

Field	Value
Publication number	US-11744108-B2
Application number	US-202217731111-A
Country	US
Kind code	B2
Filing date	Apr 27, 2022
Priority date	Dec 14, 2018
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

A display apparatus including two lines is provided. The two lines may extend in a first direction. A light-emitting device may be disposed between the two lines. Each line may be bent or extended in the direction of the device substrate which supports the light-emitting device. Thus, in the display apparatus, mixing of light emitted to the outside through the device substrate may be prevented. Therefore, in the display apparatus, the quality of realized image may be improved.

First claim

The invention claimed is:

1. A display device, comprising:
a first signal line and a second signal line spaced apart from the first signal line on a substrate, the first signal line and the second signal line extending in a first direction;
a unit pixel between the first signal line and the second signal line, the unit pixel including a light-emitting element comprising a first electrode, an organic light emitting layer, and a second electrode, and
a reflective pattern overlapping with at least two of the first signal line, the second signal line and the first electrode.

2. The display device according to claim 1 , further comprising a first insulating layer between the signal lines and the substrate, and a second insulating layer disposed on the signal lines.

3. The display device according to claim 2 , further comprising a color filter disposed on the second insulating layer, the color filter between the first signal line and the second signal line.

4. The display device according to claim 3 , further comprising a third insulating layer between the color filter and the light-emitting element.

5. The display device according to claim 1 , wherein the reflective pattern is disposed under the signal lines.

6. The display device according to claim 1 , wherein a width of the reflective pattern is smaller than that of the first electrode.

7. The display device according to claim 1 , wherein the reflective pattern surrounds at least three sides of the first electrode of the unit pixel.

8. A display device, comprising:
an emitting region on a substrate, the emitting region surrounded by a first signal line, a second signal line, and a third signal line, the first signal line and the second signal line spaced apart from the first signal line extending in a first direction, and the third signal line extending in a second direction transverse to the first direction,
a light-emitting element disposed in the emitting region, the light-emitting element comprising a first electrode, an organic light emitting layer, and a second electrode, and
at least one reflective pattern overlapping with at least two of the signal lines and the emitting region.

9. The display device according to claim 8 , wherein the at least one reflective pattern overlaps with an edge of the first electrode.

10. A display device, comprising:
a substrate;
a first signal line and a second signal line on the substrate, the first signal line being spaced apart from the second signal line and the first and second signal lines extending in a first direction;
a light-emitting device between the first signal line and the second signal line, the light-emitting device including a first electrode, a second electrode, and a light emitting layer between the first and second electrodes;
a reflective pattern between the substrate and at least one of the first and second signal lines, the reflective pattern overlapping with at least one of the first signal line and the second signal line.

11. The display device according to claim 10 , further comprising:
a buffer layer between the substrate and the at least one of the first and second signal lines and the substrate,
wherein the reflective pattern is disposed within the buffer layer.

12. The display device according to claim 11 , wherein the reflective pattern is electrically conductive and is in electrical contact at least one of the first signal line and the second signal line.

13. The display device according to claim 12 , wherein the buffer layer includes a first buffer layer and a second buffer layer, and
wherein the second buffer layer includes different material from the first buffer layer.

14. The display device according to claim 12 , wherein the buffer layer includes a first buffer layer and a second buffer layer, and
wherein the second buffer layer is thicker than the first buffer layer.

15. The display device according to claim 10 , further comprising:
a buffer layer between the substrate and the at least one of the first and second signal lines and the substrate,
wherein the reflective pattern is disposed within the substrate and the buffer layer is on the reflective pattern.

16. The display device according to claim 15 , wherein the reflective pattern has a stacked structure including a first reflective layer and a second reflective layer on the first reflective layer,
wherein the second reflective layer includes different material than the first reflective layer.

17. The display device according to claim 16 , further comprising:
a transistor electrically connected to the light-emitting device, the transistor including a semiconductor pattern;
a blocking layer disposed under the transistor, the blocking layer, in operation, blocks light traveling in a direction of the semiconductor pattern through the substrate,
wherein the first reflective layer includes a same material as the blocking layer.

18. The display device according to claim 10 , further comprising a color filter on the reflective pattern,
wherein the reflective pattern overlaps with the first electrode of the light-emitting device and does not overlap with the color filter.

19. The display device according to claim 10 , further comprising:
a second reflective pattern on a same layer as the reflective pattern and spaced apart from the reflective pattern;
a color filter on both the reflective pattern and the second reflective pattern,
wherein the second reflective pattern overlaps with the first electrode of the light-emitting device and does not overlap with the color filter.

20. The display device according to claim 10 , wherein a width of the reflective pattern along a second direction transverse to the first direction is smaller than a width of the first electrode along the second direction.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Seong-Joo
• Bang Jung-Ho
• Beak Jung-Sun
• Lee Sun-Mi
• Kim Tae-Hwan
• Im Hyeon-Chul

Classifications

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10D86/451 Primary

  characterised by the compositions or shapes of the interlayer dielectrics · CPC title

• H10K59/121 Primary

  characterised by the geometry or disposition of pixel elements · CPC title

• G02F1/133514

  Colour filters · CPC title

• H10K59/122

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