Organic light-emitting diode display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-2024260410-A1
Application number	US-202318514950-A
Country	US
Kind code	A1
Filing date	Nov 20, 2023
Priority date	Jan 30, 2023
Publication date	Aug 1, 2024
Grant date	—

Abstract

An organic light-emitting diode display device can include a substrate including a first sub-pixel and a second sub-pixel; an interlayer insulation layer over the substrate and having different heights; and a first light-emitting diode disposed at the first sub-pixel and a second light-emitting diode disposed at the second sub-pixel over the substrate, wherein each of the first light-emitting diode or second light-emitting diode includes a first electrode, a light-emitting layer, and a second electrode, and the light-emitting layer includes a first stack, a charge generation layer, and a second stack, and wherein the second electrode of the first light-emitting diode is electrically connected to the charge generation layer of the first light-emitting diode, and the second electrode of the second light-emitting diode is separated from the charge generation layer of the second light-emitting diode.

First claim

1 . An organic light-emitting diode display device, comprising:
a substrate including a first sub-pixel and a second sub-pixel; an interlayer insulation layer over the substrate and having different heights; and a first light-emitting diode disposed at the first sub-pixel and a second light-emitting diode disposed at the second sub-pixel over the substrate, wherein each of the first light-emitting diode or second light-emitting diode includes a first electrode, a light-emitting layer, and a second electrode, and the light-emitting layer includes a first stack, a charge generation layer, and a second stack, and wherein the second electrode of the first light-emitting diode is electrically connected to the charge generation layer of the first light-emitting diode, and the second electrode of the second light-emitting diode is separated from the charge generation layer of the second light-emitting diode.

2 . The organic light-emitting diode display device of claim 1 , wherein the interlayer insulation layer in the first sub-pixel has a first height, and the interlayer insulation layer in the second sub-pixel has a second height smaller than the first height.

3 . The organic light-emitting diode display device of claim 2 , wherein a difference between the first height and the second height is greater than a thickness of the light-emitting layer.

4 . The organic light-emitting diode display device of claim 2 , wherein the charge generation layer of the first light-emitting diode is separated from the charge generation layer of the second light-emitting diode, and the second electrode of the first light-emitting diode is separated from the second electrode of the second light-emitting diode.

5 . The organic light-emitting diode display device of claim 4 , wherein the first and second stacks of the first light-emitting diode are separated from the first and second stacks of the second light-emitting diode, respectively.

6 . The organic light-emitting diode display device of claim 2 , wherein the substrate includes a third sub-pixel and a third light-emitting diode disposed at the third sub-pixel over the substrate, and the second sub-pixel is disposed between the first sub-pixel and the third sub-pixel, and
wherein the interlayer insulation layer has a trench between the second sub-pixel and the third sub-pixel.

7 . The organic light-emitting diode display device of claim 6 , wherein the third light-emitting diode includes a charge generation layer that is separated from the charge generation layer of the second light-emitting diode, and
wherein a second electrode of the third light-emitting diode is connected to the second electrode of the second light-emitting diode.

8 . The organic light-emitting diode display device of claim 6 , wherein the interlayer insulation layer in the third sub-pixel has the second height.

9 . The organic light-emitting diode display device of claim 2 , further comprising
a blue color filter disposed over the first light-emitting diode in the first sub-pixel, and a red or a green color filter disposed over the second light-emitting diode in the second sub-pixel.

10 . The organic light-emitting diode display device of claim 2 , wherein the substrate includes a third sub-pixel and a fourth sub-pixel, and the first, second, third, and fourth sub-pixels are sequentially arranged, and
wherein the interlayer insulation layer in the third sub-pixel has the first height, and the interlayer insulation layer in the fourth sub-pixel has the second height.

11 . The organic light-emitting diode display device of claim 10 , further comprising,
a blue color filter disposed in each of the first and third sub-pixels, a red color filter disposed in one of the second and fourth sub-pixels, and a green color filter is disposed in another one of the second and fourth sub-pixels.

12 . An organic light-emitting diode display device, comprising:
a substrate including a first sub-pixel and a second sub-pixel; an interlayer insulation layer over the substrate; and a light-emitting diode disposed at each of the first and second sub-pixels over the substrate, wherein the light-emitting diode includes a first electrode, a light-emitting layer, and a second electrode, and the light-emitting layer includes a first stack, a charge generation layer, and a second stack, and wherein a first height of the interlayer insulation layer in the first sub-pixel is higher than a second height of the interlayer insulation layer in the second sub-pixel.

13 . The organic light-emitting diode display device of claim 12 , wherein a difference between the first height and the second height is greater than a thickness of the light-emitting layer.

14 . The organic light-emitting diode display device of claim 12 , wherein a charge generation layer of a light-emitting diode disposed at the first sub-pixel is separated from a charge generation layer of a light-emitting diode disposed at the second sub-pixel, and a second electrode of the light-emitting diode disposed at the first sub-pixel is separated from a second electrode of the light-emitting diode disposed at the second sub-pixel.

15 . The organic light-emitting diode display device of claim 14 , wherein the first and second stacks of the light-emitting diode disposed at the first sub-pixel are separated from the first and second stacks of the light-emitting diode disposed at the second sub-pixel, respectively.

16 . The organic light-emitting diode display device of claim 12 , wherein the substrate includes a third sub-pixel, and the second sub-pixel is disposed between the first sub-pixel and the third sub-pixel, and
wherein the interlayer insulation layer has a trench between the second sub-pixel and the third sub-pixel.

17 . The organic light-emitting diode display device of claim 16 , wherein a charge generation layer of a light-emitting diode disposed at the third sub-pixel is separated from a charge generation layer of a light-emitting diode disposed at the second sub-pixel, and
wherein a second electrode of the light-emitting diode disposed at the third sub-pixel is connected to a second electrode of the light-emitting diode disposed at the second sub-pixel.

18 . The organic light-emitting diode display device of claim 16 , wherein the interlayer insulation layer in the third sub-pixel has the second height.

19 . The organic light-emitting diode display device of claim 12 , further comprising a blue color filter disposed in the first sub-pixel, and a red or a green color filter disposed in the second sub-pixel.

20 . The organic light-emitting diode display device of claim 12 , wherein the substrate includes a third sub-pixel and a fourth sub-pixel, and the first, second, third, and fourth sub-pixels are adjacent to one another, and
wherein the interlayer insulation layer in the third sub-pixel has the first height, and the interlayer insulation layer in the fourth sub-pixel has the second height.

21 . The organic light-emitting diode display device of claim 20 , further comprising
a blue color filter disposed in each of the first and third sub-pixels, a red color filter disposed in one of the second or fourth sub-pixels, and a green color filter disposed in another one of the second or fourth sub-pixels.

22 . A method of manufacturing an organic light-emitting diode display device, comprising:
forming an interlayer insulation layer over a substrate including a first sub-pixel and a second sub-pixe

Assignees

• Lg Display Co Ltd

Inventors

• Kim Ho-Jin
• Park Ji-Yeon

Classifications

• G09F9/335

  being organic light emitting diodes [OLED] · CPC title

• H10K50/805

  Electrodes · CPC title

• H10K50/19

  Tandem OLEDs · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/35

  comprising red-green-blue [RGB] subpixels · CPC title