Display device

Patent metadata

Field	Value
Publication number	US-2025255126-A1
Application number	US-202419002467-A
Country	US
Kind code	A1
Filing date	Dec 26, 2024
Priority date	Feb 2, 2024
Publication date	Aug 7, 2025
Grant date	—

Abstract

A display device according to an example of the present disclosure can include a substrate, a first protective layer on the substrate, a lower insulating layer on the first protective layer, a first upper insulating layer on the lower insulating layer, a second upper insulating layer on the lower insulating layer and spaced apart from the first upper insulating layer in a first direction, a first pixel electrode on the first upper insulating layer, a second pixel electrode on the lower insulating layer and disposed between one side of the first upper insulating layer and another side of the second upper insulating layer, and a third pixel electrode on the second upper insulating layer.

First claim

What is claimed is:

1 . A display device comprising:
a substrate; a lower insulating layer on the substrate; a first upper insulating layer on the lower insulating layer; a first pixel electrode on the first upper insulating layer; and a second pixel electrode on the lower insulating layer and disposed on one side of the first upper insulating layer in a first direction.

2 . The display device of claim 1 , further comprising:
a second upper insulating layer located on the lower insulating layer and spaced apart from the first upper insulating layer in the first direction, with the second pixel electrode interposed therebetween; and a third pixel electrode on the second upper insulating layer.

3 . The display device of claim 2 , further comprising:
a fourth pixel electrode on the lower insulating layer and disposed on one side of the second upper insulating layer in the first direction; a third upper insulating layer on the lower insulating layer and disposed on one side of the second pixel electrode in a second direction different from the first direction; and a fifth pixel electrode on the third upper insulating layer, wherein the first pixel electrode, the second pixel electrode, the third pixel electrode, the fourth pixel electrode, and the fifth pixel electrode are included in a first subpixel, a second subpixel, a third subpixel, a fourth subpixel, and a fifth subpixel, respectively.

4 . The display device of claim 3 , wherein the first subpixel, the second subpixel, the third subpixel, and the fourth subpixel are arranged in a first subpixel row, and the fifth subpixel is arranged in a second subpixel row adjacent to the first subpixel row in the second direction,
wherein the second subpixel and the fifth subpixel are arranged in a second subpixel column, wherein the first upper insulating layer and the second upper insulating layer are disposed in the first subpixel row, wherein the third upper insulating layer is disposed in the second subpixel row, and wherein the first upper insulating layer, the second upper insulating layer, and the third upper insulating layer are disposed to be spaced apart from each other in an island shape.

5 . The display device of claim 3 , wherein each of the first upper insulating layer, the second upper insulating layer, and the third upper insulating layer has a size corresponding to an emission area of the subpixel.

6 . The display device of claim 3 , wherein the second pixel electrode and the fourth pixel electrode are located closer to the substrate than the first pixel electrode, the third pixel electrode, and the fifth pixel electrode.

7 . The display device of claim 3 , further comprising:
an intermediate layer on the first pixel electrode, the second pixel electrode, the third pixel electrode, the fourth pixel electrode, and the fifth pixel electrode; and a common electrode on the intermediate layer and including a reflective electrode material, wherein the common electrode includes a plurality of inclined surfaces.

8 . The display device of claim 7 , wherein the common electrode has an inclined surface on each side of the first upper insulating layer, the second upper insulating layer, and the third upper insulating layer, and has an inclined surface on a side of the second subpixel and the fourth subpixel.

9 . The display device of claim 8 , wherein the common electrode has an inclined surface on each of four sides of each of the first upper insulating layer, the second upper insulating layer, and the third upper insulating layer, and has an inclined surface on each of two sides among four sides of each of the second subpixel and the fourth subpixel.

10 . The display device of claim 7 , wherein the common electrode has an inclined surface on each of two sides among four sides of each of the second subpixel and the fourth subpixel in the second direction.

11 . The display device of claim 7 , wherein a first light emitting device of the first subpixel includes the first pixel electrode, the intermediate layer, and the common electrode,
wherein a second light emitting device of the second subpixel includes the second pixel electrode, the intermediate layer, and the common electrode, wherein a third light emitting device of the third subpixel includes the third pixel electrode, the intermediate layer, and the common electrode, wherein a fourth light emitting device of the fourth subpixel includes the fourth pixel electrode, the intermediate layer, and the common electrode, wherein a fifth light emitting device of the fifth subpixel includes the fifth pixel electrode, the intermediate layer, and the common electrode, and wherein the common electrode includes:
four first inclined surfaces located on four sides of the first light emitting device;
two second inclined surfaces located on two of the four sides of the second light emitting device;
four third inclined surfaces located on four sides of the third light emitting device;
two fourth inclined surfaces located on two of the four sides of the fourth light emitting device; and
four fifth inclined surfaces located on four sides of the fifth light emitting device.

12 . The display device of claim 11 , wherein a first light emitted from the first light emitting device is reflected from the four first inclined surfaces and travels toward the substrate,
wherein a second light emitted from the second light emitting device is reflected from the two second inclined surfaces and travels toward the substrate, wherein a third light emitted from the third light emitting device is reflected from the four third inclined surfaces and travels toward the substrate, wherein a fourth light emitted from the fourth light emitting device is reflected from the two fourth inclined surfaces and travels toward the substrate, and wherein a fifth light emitted from the fifth light emitting device is reflected from the four fifth inclined surfaces and travels toward the substrate.

13 . The display device of claim 7 , wherein a first data voltage for emitting light of a first luminance is supplied to the first subpixel,
wherein a second data voltage for emitting light of a second luminance is supplied to the second subpixel, wherein a third data voltage for emitting light of a third luminance is supplied to the third subpixel, wherein a fourth data voltage for emitting light of fourth luminance is supplied to the fourth subpixel, wherein a fifth data voltage for emitting light of a fifth luminance is supplied to the fifth subpixel, and wherein, if the first to fifth luminances are the same, the second data voltage and the fourth data voltage are higher than the first data voltage, the third data voltage, and the fifth data voltage.

14 . The display device of claim 13 , further comprising:
a data correction circuit configured to generate correction data for each subpixel by correcting data for each subpixel based on correction control information for each subpixel which varies depending on a number of inclined surfaces of the common electrode around the light emitting device of the corresponding subpixel.

15 . The display device of claim 13 , wherein the correction control information for each subpixel includes at least one of a number of mirrors for each subpixel, light extraction efficiency for each subpixel, and a data compensation value for each subpixel,
wherein the number of mirrors for each subpixel corresponds to or is proportional to the number of inclined surfaces of the common electrode around the light emitting device of the corresponding subpixel, wherei

Assignees

• Lg Display Co Ltd

Inventors

• Ban Myungho
• Kim Kyungmin
• Park Hyemin

Classifications

• H10K59/80521

  characterised by their shape · CPC title

• G09G3/3258

  with pixel circuitry controlling the voltage across the light-emitting element · CPC title

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/878 Primary

  comprising reflective means · CPC title