Display device

Patent metadata

Field	Value
Publication number	US-11075364-B2
Application number	US-201916696337-A
Country	US
Kind code	B2
Filing date	Nov 26, 2019
Priority date	Nov 28, 2018
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A display device comprises a display panel; a light control layer disposed on one side of the display panel through which light is transmitted, the light control layer including a plurality of light absorption patterns spaced apart from each other; and a plurality of reflection patterns disposed under the plurality of light absorption patterns and reflecting light travelling toward to the plurality of light absorption patterns.

First claim

What is claimed is:

1. A display device, comprising:
a display panel;
a light control layer disposed on one side of the display panel through which light is transmitted, wherein the light control layer includes a plurality of light absorption patterns spaced apart from each other; and
a plurality of reflection patterns disposed under the plurality of light absorption patterns and reflecting light travelling toward to the plurality of light absorption patterns,
wherein a thickness of the plurality of light absorption patterns is greater than a thickness of the plurality of reflection patterns.

2. The display device of claim 1 , wherein the light control layer is formed of a transparent resin, and the plurality of light absorption patterns is disposed in the light control layer, and
wherein the light control layer has a light blocking region where the plurality of light absorption patterns is disposed and a light transmission region where the plurality of light absorption patterns is not disposed.

3. The display device of claim 2 , wherein the transparent resin includes one of polyimide (PI), cyclic olefin polymer (COP), polycarbonate (PC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polynorbornene (PNB) and polyethersulfone (PES).

4. The display device of claim 2 , wherein the plurality of light absorption patterns includes a black resin or a dye that absorbs light.

5. The display device of claim 1 , wherein the plurality of light absorption patterns has a width in cross-section that increases as the plurality of light absorption patterns is distanced away from the display panel.

6. The display device of claim 1 , wherein the plurality of light absorption patterns has a height that blocks light which travels at ±30 degrees up and down and left and right from the display panel.

7. The display device of claim 1 , wherein the plurality of light absorption patterns has a width that is 10˜50% of a distance between adjacent two light absorption patterns.

8. The display device of claim 1 , wherein the plurality of light absorption patterns has a shape of stripes parallel to a first length direction of the light control layer or a second length direction perpendicular to the first length direction.

9. The display device of claim 1 , wherein the plurality of light absorption patterns has a mesh shape formed along a first length direction of the light control layer and a second length perpendicular to the first length direction.

10. The display device of claim 1 , wherein the plurality of reflection patterns includes a light reflective material.

11. The display device of claim 1 , wherein the display panel includes a driving thin film transistor and a light-emitting diode for each sub-pixel,
wherein the thin film transistor includes a semiconductor layer, a gate insulating layer on the semiconductor layer, a gate electrode on the gate insulating layer, an interlayer insulating layer on the gate electrode, and source and drain electrodes on the interlayer insulating layer, and
wherein the light-emitting diode includes a first electrode connected to the driving thin film transistor, a light-emitting layer on the first electrode, and a second electrode on the light-emitting layer.

12. The display device of claim 11 , wherein the light-emitting diode and the driving thin film transistor are encapsulated by a protective film, and
wherein the light control layer is disposed on an outside surface of the protective film.

13. The display device of claim 1 , wherein the display panel includes a plurality of sub-pixel each having an emission area and a non-emission area, and at least one of the plurality of light absorption patterns overlaps the emission area.

14. A display device, comprising:
a display panel;
a plurality of reflection patterns disposed on the display panel and blocking light incident at a predetermined angle from the display panel and reflecting the light toward the display panel;
a first light control layer disposed on the display panel; and
a plurality of first light absorption patterns spaced apart from each other and disposed in the first light control layer and selectively blocking a propagation path of incident light from the display panel,
wherein the plurality of first light absorption patterns has a width that increases from a lower surface of the light control layer to an upper surface of the light control layer, and
wherein a thickness of the plurality of first light absorption patterns is greater than a thickness of the plurality of reflection patterns.

15. The display device of claim 14 , further comprising:
a second light control layer disposed on the first light control layer; and
a plurality of second light absorption patterns spaced apart from each other and disposed in the second light control layer and selectively blocking a propagation path of incident light from the first light control layer.

16. The display device of claim 14 , wherein the plurality of first light absorption patterns has a width that is 10˜50% of a distance between adjacent two first light absorption patterns.

17. The display device of claim 14 , wherein the plurality of light absorption patterns has a shape of stripes parallel to a first length direction of the first light control layer or a second length direction perpendicular to the first length direction.

18. The display device of claim 14 , wherein the plurality of first light absorption patterns has a mesh shape formed along a first length direction of the first light control layer and a second length perpendicular to the first length direction.

19. The display device of claim 14 , wherein the plurality of reflection patterns includes a light reflective material.

20. The display device of claim 14 , wherein the display panel includes a driving thin film transistor and a light-emitting diode for each sub-pixel,
wherein the thin film transistor includes a semiconductor layer, a gate insulating layer on the semiconductor layer, a gate electrode on the gate insulating layer, an interlayer insulating layer on the gate electrode, and source and drain electrodes on the interlayer insulating layer, and
wherein the light-emitting diode includes a first electrode connected to the driving thin film transistor, a light-emitting layer on the first electrode, and a second electrode on the light-emitting layer.

21. The display device of claim 20 , wherein the light-emitting diode and the driving thin film transistor are encapsulated by a protective film.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Dong-Yul
• Choi Nack-Bong

Classifications

• H10K59/878

  comprising reflective means · CPC title

• H10K59/12 Primary

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/8792 Primary

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

• H10K59/875

  Arrangements for extracting light from the devices · CPC title

• H10K59/873

  Encapsulations · CPC title