Display panel

Patent metadata

Field	Value
Publication number	US-12114452-B2
Application number	US-202217988618-A
Country	US
Kind code	B2
Filing date	Nov 16, 2022
Priority date	Dec 22, 2021
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

A display panel can prevent a Greenish phenomenon by preventing a shift phenomenon of a transistor inside a display layer, by applying a permittivity reduction processing on a component disposed upon a panel layer. The display panel can include a cover window, an adhesive layer disposed below the cover window, a polarizer disposed below the adhesive layer, and the panel layer disposed below the polarizer. Further, at least one among the cover window, the adhesive layer and the polarizer can be applied with a permittivity reduction processing.

First claim

What is claimed is:

1. A display panel comprising:
a cover window;
an adhesive layer disposed below the cover window;
a polarizer disposed below the adhesive layer;
a panel layer disposed below the polarizer and including an active area with pixels configured to emit light and a non-active area corresponding to a bezel area surrounding edges of the active area, wherein one edge of the panel layer comprises a bent portion rearwardly bent such that the one edge of the panel layer partially overlaps with the active area;
a pad area including pads disposed in the non-active area at the one edge of the panel layer;
a first wiring in a first layer of the one edge of the panel layer and a second wiring in a second layer of the one edge of the panel layer, the first and second wirings electrically bending along the predefined curvature of the panel layer and connecting the pads to the panel layer for driving the pixels to emit light; and
a support member supporting the active area of the panel layer,
wherein at the one edge of the panel layer comprising the bent portion, the support member includes an adhesive, a cushion tape and a heat dissipation sheet sequentially disposed below the panel layer, and
wherein at other edges of the panel layer other than the one edge comprising the bent portion, the support member includes the adhesive and the cushion tape sequentially disposed below the panel layer.

2. The display panel of claim 1 , wherein an electric field is formed with an electric charge penetrated from the cover window into the panel layer.

3. The display panel of claim 1 , wherein a permittivity of the adhesive layer is lower than a permittivity of the cover window.

4. The display panel of claim 1 , wherein the adhesive layer is formed of a material having a permittivity of about 2.6 or less.

5. The display panel of claim 1 , wherein the adhesive layer comprises a low permittivity filler.

6. The display panel of claim 1 , wherein the cover window further comprises a low permittivity coating layer disposed below the cover window.

7. The display panel of claim 1 , further comprising:
a low permittivity coating layer disposed on the polarizer.

8. The display panel of claim 1 , further comprising:
a low permittivity coating layer disposed below the polarizer.

9. A display panel comprising:
a cover window;
an adhesive layer disposed below the cover window;
a polarizer disposed below the adhesive layer;
a panel layer disposed below the polarizer; and
a pad area including pads,
wherein at a pad edge where the pad area is in contact with, the display panel further comprises:
a circuit element and a driver integrated circuit (IC) disposed below the panel layer; and
an adhesive, a cushion tape and a heat dissipation sheet sequentially disposed below the panel layer, and
wherein at least one among the cover window, the adhesive layer and the polarizer is applied with a permittivity reduction processing.

10. A display panel comprising:
a cover window;
an adhesive layer disposed below the cover window;
a polarizer disposed below the adhesive layer;
a panel layer disposed below the polarizer; and
a pad area including pads,
wherein at a peripheral edge where the pad area is not in contact with, the display panel further comprises an adhesive and a cushion tape sequentially disposed below the panel layer,
wherein the cushion tape is directly attached to a middle frame, and
wherein at least one among the cover window, the adhesive layer and the polarizer is applied with a permittivity reduction processing.

11. The display panel of claim 1 , wherein the display panel further comprises a pad area including pads, and
wherein at a peripheral edge where the pad area is not in contact with, no heat dissipation sheet is disposed below the panel layer.

12. The display panel of claim 1 , wherein a micro-coating layer is disposed on an outer surface of the one edge of the panel layer to protect the first wirings and the second wirings.

13. The display panel of claim 1 , wherein at the one edge of the panel layer comprising the bent portion, the heat dissipation sheet is disposed in the active area and the non-active area.

14. The display panel of claim 13 , wherein at the one edge of the panel layer comprising the bent portion, the heat dissipation sheet in the non-active area is directly attached to the adhesive.

15. The display panel of claim 14 , wherein at the one edge of the panel layer comprising the bent portion, the heat dissipation sheet in the active area is directly attached to the heat dissipation sheet.

16. The display panel of claim 15 , wherein the heat dissipation sheet inclines at a predetermined angle in the active area to be directly connected to the adhesive in the non-active layer.

17. The display panel of claim 16 , wherein a gap exists between the inclining heat dissipation sheet and the cushion tape.

Assignees

• Lg Display Co Ltd

Inventors

• Shin Myeongah
• Lee Junjae

Classifications

• H10D86/60

  wherein the TFTs are in active matrices · CPC title

• H10D86/411

  characterised by materials, geometry or structure of the substrates · CPC title

• H10D89/60

  Integrated devices comprising arrangements for electrical or thermal protection, e.g. protection circuits against electrostatic discharge [ESD] · CPC title

• H10D86/40 Primary

  characterised by multiple TFTs · CPC title

• H05K7/20963

  Heat transfer by conduction from internal heat source to heat radiating structure (H05K7/20972 takes precedence) · CPC title