Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-10396129-B2
Application number	US-201815965705-A
Country	US
Kind code	B2
Filing date	Apr 27, 2018
Priority date	Oct 30, 2015
Publication date	Aug 27, 2019
Grant date	Aug 27, 2019

Abstract

An organic light-emitting display device. A substrate is divided into a plurality of subpixels generating different colors of light. A light leakage prevention layer is disposed on a portion of the substrate corresponding to a light-emitting area of at least one subpixel of the plurality of subpixels. An overcoat layer is disposed on a portion of the substrate corresponding to at least one subpixel of the plurality of subpixels, and includes microlenses having a plurality of concave portions or a plurality of convex portions. An organic electroluminescent device is disposed on the overcoat layer.

First claim

What is claimed is:

1. An organic light-emitting display device comprising:
a substrate;
a pixel disposed on the substrate and including a plurality of subpixels;
an overcoat layer disposed on the substrate, the overcoat layer including microlenses having a plurality of concave portions concavely formed from an upper surface of the overcoat layer;
an organic electroluminescent device disposed on the overcoat layer;
a bank pattern disposed on the overcoat layer and configured to define a light-emitting area of the plurality of subpixels; and
light filter layers respectively disposed in each of the plurality of subpixels,
wherein some of the plurality of subpixels include both microlenses and the respective light filter layer, and the remaining subpixels of the plurality of subpixels include only the light filter layer,
wherein the organic electroluminescent device disposed in the some of the plurality of subpixels is directly contacted with a surface of the microlenses, and
wherein the organic electroluminescent device disposed in the remaining subpixels is directly contacted with the overcoat layer.

2. The organic light-emitting display device according to claim 1 , wherein each light filter layer allows different colors of light to pass therethrough.

3. The organic light-emitting display device according to claim 2 , wherein the microlenses disposed in the some of the plurality of subpixels have shapes that are different from each other.

4. The organic light-emitting display device according to claim 2 , wherein a number of microlenses per unit area disposed in the some of the plurality of subpixels are different from each other.

5. The organic light-emitting display device according to claim 2 , wherein:
the pixel includes red, green, and blue subpixels,
the some of the plurality of subpixels includes the red subpixel and the green subpixel, and
the remaining subpixels of the plurality of subpixels includes the blue subpixel.

6. The organic light-emitting display device according to claim 5 , wherein the pixel further includes a white subpixel, and
wherein the white subpixel includes the microlenses.

7. The organic light-emitting display device according to claim 6 , wherein the white subpixel further includes the light filter layer.

8. The organic light-emitting display device according to claim 7 , wherein the light filter layer disposed in the white subpixel is thinner than the light filter layers disposed in the red, green, and blue subpixels.

9. The organic light-emitting display device according to claim 1 , wherein the organic electroluminescent device includes:
a first electrode disposed on the overcoat layer;
an organic light-emitting layer disposed on the first electrode; and
a second electrode disposed on the an organic light-emitting layer,
wherein the first electrode disposed in each of the plurality of subpixels is directly contacted with the overcoat layer including the microlenses.

10. The organic light-emitting display device according to claim 1 , wherein at least two light filter layer of the light filter layers allows a same color of light to pass therethrough.

11. The organic light-emitting display device according to claim 1 , wherein at least one light filter layer of the light filter layers allows a color of light complementary to at least one color of light passing through remaining light filter layers to pass therethrough.

12. The organic light-emitting display device according to claim 1 , wherein the organic electroluminescent device disposed on the microlenses in the some of the plurality of subpixels is contacted with a corresponding light filter layer.

13. An organic light-emitting display device comprising:
a substrate;
a pixel disposed on the substrate, the pixel being included red, green, and blue subpixels;
light filter layers respectively disposed in each of the red, green, and blue subpixels;
an overcoat layer disposed on the light filter layers and including microlenses having a plurality of concave portions concavely formed from an upper surface of the overcoat layer;
an organic electroluminescent device disposed on the overcoat layer; and
a bank pattern disposed on the overcoat layer and configured to define a light-emitting area of the red, green, and blue subpixels,
wherein each of the red subpixel and the green subpixel includes the microlenses disposed between the organic electroluminescent device and the substrate, and the light filter layer disposed between the microlenses and the substrate, and
wherein the blue subpixel includes the light filter layer disposed between the organic electroluminescent device and the substrate,
wherein the organic electroluminescent device disposed in each of the red subpixel and the green subpixel is directly contacted with a surface of the microlenses, and
wherein the organic electroluminescent device disposed in the blue subpixels is directly contacted with the overcoat layer.

14. The organic light-emitting display device according to claim 13 , wherein the light filter layers disposed in the red, green, and blue subpixels allow different colors of light to pass therethrough.

15. The organic light-emitting display device according to claim 13 , wherein a number of the microlenses per unit area disposed in the red subpixel and the green subpixel are different from each other.

16. The organic light-emitting display device according to claim 13 , wherein the pixel further includes a white subpixel, and
wherein the white subpixel includes the microlenses disposed between the organic electroluminescent device and the substrate.

17. The organic light-emitting display device according to claim 16 , wherein the white subpixel further includes the light filter layer.

18. The organic light-emitting display device according to claim 17 , wherein the light filter layer disposed in the white subpixel is thinner than the light filter layers disposed in the red, green, and blue subpixels.

19. An organic light-emitting display device comprising:
a substrate;
a pixel disposed on the substrate, the pixel including a first group having some of a plurality of subpixels and a second group having the remaining of the plurality of subpixels;
a light filter layer disposed in at least one subpixel of the plurality of subpixels;
an overcoat layer disposed on the substrate;
an organic electroluminescent device disposed on the overcoat layer; and
a bank pattern disposed on the overcoat layer and configured to define a light-emitting area of the plurality of subpixels,
wherein the overcoat layer includes microlenses disposed in each of the subpixels of the first group, and a flat surface disposed in the subpixel of the second group,
wherein the microlenses includes a plurality of concave portions concavely formed from an upper surface of the overcoat layer,
wherein the organic electroluminescent device disposed in each of the subpixels of the first group is directly contacted with a surface of the microlenses, and
wherein the organic electroluminescent device disposed in the subpixel of the second group is directly contacted with the flat surface of the overcoat layer.

20. The organic light-emitting display device according to claim 19 , wherein the pixel includes red, green, and blue subpixels, the first group including the red subpixel and the green subpixel, and the second group including the blue subpixel,
wherein each of the red subpixel and the green subpixel includes the microlenses disposed between the

Assignees

• Lg Display Co Ltd

Inventors

• Jang Jihyang
• Lee Kangju
• Joung Seungryong
• Park Hansun
• Kim Sookang
• Jo Soyoung
• Jeon Seongsu
• Koo Wonhoe
• Lim Hyunsoo
• Park Jeaho
• Choi Mingeun
• Kim Hyunjoo
• Youn Wooram

Classifications

• H01L27/3272

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic

• H01L27/3213 Primary

  Electricity · mapped topic

• H01L27/322

  Electricity · mapped topic

• H01L51/5275

  Electricity · mapped topic