Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-10516002-B2
Application number	US-201816116405-A
Country	US
Kind code	B2
Filing date	Aug 29, 2018
Priority date	Aug 31, 2017
Publication date	Dec 24, 2019
Grant date	Dec 24, 2019

Abstract

An organic light emitting display device includes a substrate including a plurality of pixel regions, a light absorption material layer in a white pixel region of the plurality of pixel regions and including a light absorption dye, an overcoat layer on the light absorption material layer, a micro-lens structure at a top surface of the overcoat layer, and an emitting diode on the micro-lens structure, wherein the light absorption dye has a main absorption wavelength of about 500 to 640 nm.

First claim

What is claimed is:

1. An organic light emitting display device, comprising:
a substrate including a plurality of pixel regions;
a light absorption material layer in a white pixel region of the plurality of pixel regions, and including a light absorption dye;
an overcoat layer on the light absorption material layer;
a micro-lens structure at a top surface of the overcoat layer; and
an emitting diode on the micro-lens structure,
wherein the light absorption dye has a main absorption wavelength of about 500 to 640 nm.

2. The organic light emitting display device according to claim 1 , wherein an area of the light absorption material layer is above about 40% of an area of an emission area of the white pixel region.

3. The organic light emitting display device according to claim 1 , wherein the light absorption dye includes one or more of tetra-aza-porphyrin (TAP), rhodamine, squalene and cyanine (CY)-based material.

4. The organic light emitting display device according to claim 1 , wherein the light absorption material layer is transparent or white.

5. The organic light emitting display device according to claim 1 , further comprising a blue color filter pattern at a side of the light absorption material layer.

6. The organic light emitting display device according to claim 5 , further comprising a bank at a boundary of the white pixel region,
wherein the blue color filter pattern overlaps the bank.

7. The organic light emitting display device according to claim 5 , further comprising a metal line at a boundary of the white pixel region,
wherein the blue color filter pattern overlaps the metal line.

8. The organic light emitting display device according to claim 1 , wherein the overcoat layer has a refractive index of about 1.5.

9. The organic light emitting display device according to claim 1 , wherein the overcoat layer includes at least one of an acryl-based resin, a phenol-based resin, a polyamide-based resin, a polyimide-based resin, a unsaturated-polyester-based resin, a polyphenylene-based resin, a polyphenylenesulfide-based resin, a benzocyclobutene-based resin and photoresist.

10. The organic light emitting display device according to claim 1 , wherein the plurality of pixel regions further include a red pixel region, a green pixel region and a blue pixel region, and a red color filter, a green color filter and a blue color filter are disposed in the red, green and blue pixel regions, respectively.

11. The organic light emitting display device according to claim 1 , further comprising:
a thin film transistor in each of the plurality of pixel regions; and
an insulating layer between the thin film transistor and the overcoat layer,
wherein the light absorption material layer is disposed on the insulating layer.

12. The organic light emitting display device according to claim 1 , wherein an area of the light absorption material layer is smaller than an area of an emission area of the white pixel region.

13. The organic light emitting display device according to claim 1 , wherein the light absorption material layer includes a plurality of light absorption material patterns being spaced apart from each other.

14. The organic light emitting display device according to claim 13 , wherein the plurality of light absorption material patterns are arranged along a direction to provide a stripe structure.

15. The organic light emitting display device according to claim 13 , wherein each of the plurality of light absorption material patterns has a bar shape, and a side surface of the light absorption material pattern has an uneven shape.

16. The organic light emitting display device according to claim 1 , wherein the light absorption material layer has a lattice shape and an opening therein to expose a part of the white pixel region.

17. The organic light emitting display device according to claim 1 , further comprising:
one of a red color filter pattern, a green color filter pattern and a black matrix pattern at a side of the light absorption material layer.

18. An organic light emitting display device, comprising:
a substrate including a first pixel region of red or green and a second pixel region of white;
an emitting diode on the substrate and corresponding to the first and second pixel regions, the emitting diode emitting a white light;
a color filter in the first pixel region and between the substrate and the emitting diode; and
a blue color filter pattern on the substrate and under the emitting diode,
wherein the blue color filter pattern is positioned between the first and second pixel regions.

19. The organic light emitting display device according to claim 18 , further comprising:
a bank positioned between the first and second pixel regions and covering an edge of a first electrode of the emitting diode,
wherein the blue color filter pattern overlaps the bank.

20. The organic light emitting display device according to claim 18 , further comprising:
a light absorption material layer in the second pixel region and including a light absorption dye,
wherein the blue color filter pattern is positioned between the color filter and the light absorption material layer, and the light absorption dye has a main absorption wavelength of about 500 to 640 nm.

Assignees

• Lg Display Co Ltd

Inventors

• Jo So-Young
• Kim Soo-Kang
• Koo Won-Hoe

Classifications

• H01L51/5275

  Electricity · mapped topic

• H01L27/3262

  Electricity · mapped topic

• H01L27/322

  Electricity · mapped topic

• H01L27/3213 Primary

  Electricity · mapped topic

• H01L51/5209

  Electricity · mapped topic