Display device

Patent metadata

Field	Value
Publication number	US-2026040802-A1
Application number	US-202519230730-A
Country	US
Kind code	A1
Filing date	Jun 6, 2025
Priority date	Aug 1, 2024
Publication date	Feb 5, 2026
Grant date	—

Abstract

A display device according to one or more examples includes a substrate, a display area including a plurality of sub-pixels, a non-display area outside the display area, an anode electrode disposed in each of the sub-pixels on the substrate, a bank disposed on the anode electrode, located at a boundary between adjacent sub-pixels, and overlapping a periphery of an upper surface of the anode electrode, and an optical pattern disposed between the periphery of the upper surface of the anode electrode and the bank, wherein the bank includes a black-based material.

First claim

What is claimed is:

1 . A display device, comprising:
a substrate; a display area including a plurality of sub-pixels; a non-display area outside the display area; an anode electrode disposed on the substrate and located in each of the plurality of sub- pixels; a bank disposed on the anode electrode, located at a boundary between adjacent sub-pixels, and overlapping a periphery of an upper surface of the anode electrode; and an optical pattern disposed between the periphery of the upper surface of the anode electrode and the bank, wherein the bank includes a black-based material.

2 . The display device of claim 1 , wherein the optical pattern comes into direct contact with the bank.

3 . The display device of claim 1 , wherein a refractive index of the optical pattern is greater than a refractive index of the bank.

4 . The display device of claim 1 , wherein the plurality of sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel and further include an organic layer disposed on the bank.

5 . The display device of claim 4 , wherein the organic layer includes a first light-emitting layer on the first sub-pixel, a second light-emitting layer on the second sub-pixel, and a third light-emitting layer on the third sub-pixel.

6 . The display device of claim 5 , wherein each of the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer is stacked in two or more layers.

7 . The display device of claim 4 , further comprising: a cathode electrode on the organic layer; and a black matrix located at the boundary between the adjacent sub-pixels on the cathode electrode, wherein a width of the black matrix is smaller than a width of the bank.

8 . The display device of claim 7 , wherein an end of the black matrix is closer to the boundary between the adjacent sub-pixels than an end of the bank.

9 . The display device of claim 7 , further comprising a touch part on the cathode electrode, wherein the touch part includes a bridge electrode, and a sensor electrode on the bridge electrode, and wherein the black matrix overlaps the bridge electrode and the sensor electrode.

10 . The display device of claim 9 , further comprising a color filter on the touch part and the black matrix, wherein the color filter includes a first color filter on the first sub-pixel, a second color filter on the second sub-pixel, and a third color filter on the third sub-pixel.

11 . The display device of claim 10 , wherein the first color filter, the second color filter, and the third color filter overlap each other at the boundaries between the sub-pixels.

12 . The display device of claim 1 , further comprising: a first transistor and a second transistor between the substrate and the anode electrode.

13 . The display device of claim 12 , further comprising: a first protective layer between the second transistor and the anode electrode; a first connection electrode disposed on the first protective layer; and a second protective layer on the first connection electrode, wherein the first connection electrode electrically connects the second transistor to the anode electrode.

14 . The display device of claim 12 , wherein a semiconductor layer of the first transistor includes polysilicon, and a semiconductor layer of the second transistor includes oxide.

15 . The display device of claim 1 , wherein the non-display area includes a low- potential voltage line, and a gate driving unit between the low-potential voltage line and the display area.

16 . The display device of claim 15 , wherein the non-display area further includes a crack sensing pattern outside the low-potential voltage line, and a dam overlapping the low-potential voltage line.

17 . The display device of claim 1 , wherein the optical pattern is formed directly on the upper surface of the anode electrode.

18 . The display device of claim 1 , wherein the optical pattern is not formed outside the bank.

19 . The display device of claim 1 , wherein the optical pattern includes an insulation material.

20 . The display device of claim 1 , wherein the optical pattern has a triangle shape, a rectangle shape, a shape with a curved upper end portion, or an inversely-tapered trapezoid shape.

21 . The display device of claim 20 , the optical pattern has the triangle shape, which has a height that is more than or equal to 1 . 2 times greater than a length of a bottom surface of the triangle shape.

22 . The display device of claim 20 , the optical pattern has a right-angled triangle shape.

23 . The display device of claim 20 , wherein a plurality of optical patterns is disposed between the periphery of the upper surface of the anode electrode and the bank.

24 . The display device of claim 20 , wherein the optical pattern is configured to refract a light transmitting into the bank to increase a traveling angle of the light with respect to a normal line for an upper surface of the substrate.

25 . The display device of claim 23 , wherein, with respect to a normal line for an upper surface of the substrate, a light transmitting into the bank is incident on one optical pattern of the plurality of optical patterns with a first traveling angle, reflected from the anode electrode, and is refracted by another optical pattern of the plurality of optical patterns to have a second traveling angle.

26 . The display device of claim 25 , wherein the second traveling angle is greater than the first traveling angle.

27 . A display device, comprising:
a substrate; a display area including a plurality of sub-pixels; a non-display area outside the display area; an anode electrode disposed on the substrate and located in each of the plurality of sub-pixels; a bank disposed on the anode electrode, located at a boundary between adjacent sub-pixels, and overlapping a periphery of an upper surface of the anode electrode; an organic layer disposed on the anode electrode and the bank; a cathode electrode on the organic layer; an encapsulation part on the cathode electrode; a touch part disposed on the encapsulation part, a first touch conductive layer having a bridge electrode, and a second touch conductive layer having a sensor electrode and disposed on the first touch conductive layer; and a black matrix disposed at the boundary between the adjacent sub-pixels on the touch part and covering the bridge electrode and the sensor electrode, wherein: a width of the black matrix is smaller than a width of the bank; and the display device further includes an optical pattern disposed between the periphery of the upper surface of the anode electrode and the bank.

28 . The display device of claim 27 , wherein an end of the black matrix is closer to the boundary between the adjacent sub-pixels than an end of the bank.

29 . The display device of claim 27 , wherein the optical pattern comes into direct contact with the bank.

30 . The display device of claim 27 , wherein a refractive index of the optical pattern is greater than a refractive index of the bank.

Assignees

• Lg Display Co Ltd

Inventors

• Hwang Seonghan
• Lee Seungbum
• Kim Younghoon
• Kim Wonrae
• Jang Kyungkook
• Choi Jiyoon

Classifications

• H10K59/40

  OLEDs integrated with touch screens · CPC title

• H10K59/122 Primary

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

• H10K59/8792 Primary

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

• H10K59/38

  comprising colour filters or colour changing media [CCM] · CPC title

• G02F1/136213

  Storage capacitors associated with the pixel electrode · CPC title