Display device that can prevent deterioration of transmittance while preventing contrast deterioration

Patent metadata

Field	Value
Publication number	US-11864416-B2
Application number	US-202117326232-A
Country	US
Kind code	B2
Filing date	May 20, 2021
Priority date	Sep 11, 2020
Publication date	Jan 2, 2024
Grant date	Jan 2, 2024

Abstract

A display device includes: a substrate; a plurality of transistors disposed on the substrate; an insulating layer disposed on the plurality of transistors; a data line and a driving voltage line disposed on the insulating layer; a pixel electrode disposed on the data line or the driving voltage line; a pixel defining layer disposed on the pixel electrode and including a pixel opening that overlaps the pixel electrode; a light emitting element layer disposed in the pixel opening; and a common electrode disposed on the light emitting element layer, wherein the pixel opening includes a first sub-pixel opening and a second sub-pixel opening and a first blocking portion that is disposed between the first sub-pixel opening and the second sub-pixel opening.

First claim

What is claimed is:

1. A display device comprising:
a substrate;
a plurality of transistors disposed on the substrate;
an insulating layer disposed on the plurality of transistors;
a data line and a driving voltage line disposed on the insulating layer;
a pixel electrode disposed on the data line or the driving voltage line;
a pixel defining layer disposed on the pixel electrode and including a pixel opening that overlaps the pixel electrode;
a light emitting element layer disposed in the pixel opening; and
a common electrode disposed on the light emitting element layer,
wherein the pixel opening comprises a first sub-pixel opening and a second sub-pixel opening, and a first blocking portion that is disposed between the first sub-pixel opening and the second sub-pixel opening, and blocks light.

2. The display device of claim 1 , wherein the first blocking portion overlaps at least one of the data line and the driving voltage line.

3. The display device of claim 2 , wherein the driving voltage line comprises two adjacent expansion portions and an opening that is disposed between the two expansion portions, and the first blocking portion overlaps the opening of the driving voltage line.

4. The display device of claim 2 , wherein the data line comprises two adjacent data lines that overlap the pixel electrode, and the first blocking portion overlaps the two adjacent data lines.

5. The display device of claim 4 , wherein the first blocking portion comprises a second blocking portion and a third blocking portion that respectively overlap the two adjacent data lines.

6. The display device of claim 5 , wherein
the second blocking portion comprises a first sub-blocking portion and a second sub-blocking portion that overlap a first edge of a first data line of the two adjacent data lines, and
the third blocking portion comprises a third sub-blocking portion and a fourth sub-blocking portion that overlap a second edge of a second data line of the two adjacent data lines.

7. The display device of claim 4 , wherein the two adjacent data lines are separated by a separation portion, and the first blocking portion overlaps the separation portion and the two adjacent data lines.

8. The display device of claim 1 , further comprising an anti-reflection portion disposed on the substrate,
wherein the anti-reflection portion comprises a light blocking layer that overlaps the pixel defining layer and a color filter layer that overlaps the light emitting element layer.

9. The display device of claim 8 , wherein the first blocking portion overlaps the color filter layer.

10. The display device of claim 9 , further comprising a touch portion disposed between the light emitting element layer and the anti-reflection portion.

11. A display device comprising:
a data line and a driving voltage line disposed on a substrate;
a pixel electrode disposed on the substrate and comprising a first pixel electrode, a second pixel electrode, and a third pixel electrode;
a pixel defining layer disposed on the substrate and including a first pixel opening that overlaps the first pixel electrode, a second pixel opening that overlaps the second pixel electrode, and a third pixel opening that overlaps the third pixel electrode;
a light emitting element layer comprising a first light emitting element layer that is disposed in the first pixel opening and displays a first color, a second light emitting element layer that is disposed in the second pixel opening and displays a second color, and a third light emitting element layer that is disposed in the third pixel opening and displays a third color; and
a common electrode disposed on the light emitting element layer,
wherein the first pixel opening comprises a first sub-pixel opening and a second sub-pixel opening,
wherein the pixel defining layer further comprises a blocking portion that overlaps the first pixel electrode,
wherein the blocking portion is disposed between the first sub-pixel opening and the second sub-pixel opening, and blocks light, and
wherein the blocking portion overlaps a step portion of the first pixel electrode.

12. The display device of claim 11 , wherein the blocking portion overlaps the driving voltage line.

13. The display device of claim 12 , wherein the driving voltage line comprises two adjacent expansion portions and an opening that is disposed between the two expansion portions, and the blocking portion overlaps the opening of the driving voltage line.

14. The display device of claim 11 , further comprising an anti-reflection portion disposed on the substrate,
wherein the anti-reflection portion comprises a light blocking portion that overlaps the pixel defining layer, and a color filter layer that overlaps the light emitting element layer, and
wherein the light blocking portion of the anti-reflection portion overlaps the color filter layer.

15. The display device of claim 11 , wherein
the second pixel opening comprises a third sub-pixel opening, a fourth sub-pixel opening, and a fifth sub-pixel opening,
the pixel defining layer further comprises a first blocking portion and a second blocking portion that overlap the second pixel electrode,
the first blocking portion is disposed between the third sub-pixel opening and the fifth sub-pixel opening,
the second blocking portion is disposed between the fourth sub-pixel opening and the fifth sub-pixel opening, and
at least one of the first blocking portion and the second blocking portion overlaps a step portion of the second pixel electrode.

16. The display device of claim 15 , wherein
the data line comprises two adjacent data lines that overlap the pixel electrode, and
the first blocking portion and the second blocking portion respectively overlap the two adjacent data lines.

17. The display device of claim 16 , wherein the first blocking portion comprises:
a first sub-blocking portion and a second sub-blocking portion that overlap a first edge of a first data line of the two adjacent data lines, and
a third sub-blocking portion and a fourth sub-blocking portion that overlap a second edge of a second data line of the two adjacent data lines.

18. The display device of claim 16 , further comprising an anti-reflection portion disposed on the substrate,
wherein the anti-reflection portion comprises a light blocking portion that overlaps the pixel defining layer, a first color filter layer that overlaps the first light emitting element layer, a second color filter layer that overlaps the second light emitting element layer, and a third color filter layer that overlaps the third light emitting element layer,
wherein the light blocking portion of the anti-reflection portion overlaps the first color filter, and
wherein at least one of the first blocking portion and the second blocking portion overlaps the second color filter layer.

19. The display device of claim 11 , wherein
the data line comprises two adjacent data lines that overlap the second pixel electrode, and
the blocking portion overlaps the two adjacent data lines.

20. The display device of claim 19 , wherein the two adjacent data lines are separated by a separation portion, and the blocking portion overlaps the separation portion and the two adjacent data lines.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Jae Hun
• Kim Jun Gi
• Sim Jun Ho
• Jung Yang-Ho

Classifications

• H10K59/12 Primary

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K50/865 Primary

  comprising light absorbing layers, e.g. light-blocking layers · CPC title

• H10K59/352 Primary

  the areas of the RGB subpixels being different · CPC title

• H10K59/124

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