Display module and display device

Patent metadata

Field	Value
Publication number	US-12167632-B2
Application number	US-202117528457-A
Country	US
Kind code	B2
Filing date	Nov 17, 2021
Priority date	Dec 8, 2020
Publication date	Dec 10, 2024
Grant date	Dec 10, 2024

Abstract

Disclosed are a display module and a display device capable of minimizing a pressed stain defect while reducing a bezel area. To this end, a thickness of a cushion portion of a cushion plate closer to a bent portion may be reduced, thereby reducing a bending radius of curvature such that the bezel area may be reduced. Further, placing a support layer having a strong supporting force formed of PET into the cushion plate such that the support layer is in contact with the heat-dissipation layer may allow minimizing an unevenness defect on the cushion plate even when a bent pad portion of a display panel presses the cushion portion. Thus, visibility of an internal pressed stain to a user may be minimized.

First claim

The invention claimed is:

1. A display module, comprising:
a display panel including a front portion, a bent portion, and a pad portion extending from the bent portion and positioned below a bottom surface of the front portion; and
a cushion plate disposed between the front portion and the pad portion of the display panel,
wherein the cushion plate includes:
an embossed layer;
a first cushion portion and a second cushion portion, the first cushion portion and the second cushion portion disposed under the embossed layer, wherein the first cushion portion includes a first cushion layer, and the second cushion portion includes a second cushion layer and a support layer; and
a heat-dissipation layer disposed under the first cushion portion and a bottom surface of the second cushion portion,
wherein the second cushion portion has a thickness that is less than a thickness of the first cushion portion, and the second cushion portion is spaced apart from the first cushion portion with the second cushion portion positioned closer to the bent portion than the first cushion portion.

2. The display module of claim 1 , wherein the second cushion layer is disposed on the support layer.

3. The display module of claim 1 , wherein the first cushion portion and the second cushion portion are on the same plane with respect to the embossed layer.

4. The display module of claim 1 , wherein the second cushion layer is thinner than the first cushion layer.

5. The display module of claim 1 , wherein the support layer includes polyethylene terephthalate (PET).

6. The display module of claim 1 , wherein the support layer includes a first adhesive layer, a body layer, and a second adhesive layer, and wherein a thickness of the body layer is 40 μm or greater.

7. The display module of claim 1 , wherein each of the first cushion layer and the second cushion layer includes a foam tape or a foam pad.

8. The display module of claim 1 , wherein the embossed layer includes an adhesive layer having an embossed pattern.

9. The display module of claim 1 , wherein the heat-dissipation layer includes at least one of cupper (Cu), aluminum (Al), and graphite.

10. The display module of claim 1 , wherein the heat-dissipation layer has a step between the first cushion portion and the second cushion portion.

11. The display module of claim 1 , wherein a top surface and a bottom surface of the first cushion portion are in contact with the embossed layer and the heat-dissipation layer, respectively.

12. The display module of claim 11 , wherein the first cushion portion includes a first support layer, the support layer of the second cushion portion being a second support layer,
wherein the first cushion layer is disposed on the first support layer.

13. The display module of claim 12 , wherein the first support layer and the second support layer have the same thickness.

14. The display module of claim 12 , wherein the second cushion layer is thinner than the first cushion layer.

15. The display module of claim 1 , further comprising:
a plate disposed between the heat-dissipation layer and the pad portion of the display panel.

16. The display module of claim 1 , further comprising:
a connection member configured to connect the pad portion to the cushion plate.

17. A display device, comprising:
a cover member;
a display module coupled to a bottom surface of the cover member; and
a frame disposed on a bottom surface of the display module to support the cover member,
wherein the display module includes:
a display panel including a front portion, a bent portion, and a pad portion extending from the bent portion and positioned below a bottom surface of the front portion;
a cushion plate disposed between the front portion and the pad portion; and
a connection member configured to connect the pad portion to the cushion plate,
wherein the cushion plate includes:
an embossed layer;
first and second cushion portions disposed on a bottom surface of the embossed layer, wherein the first cushion portion includes a first cushion layer, and the second cushion portion includes a second cushion layer and a second support layer; and
a heat-dissipation layer disposed on a bottom surface of the first cushion portion and the second cushion portion,
wherein the second cushion portion has a thickness smaller than a thickness of the first cushion portion, and is spaced apart from the first cushion portion and is closer to the bent portion than the first cushion portion.

Assignees

• Lg Display Co Ltd

Inventors

• Cha Jongseok
• Jang Dongwon
• Lee Buhui
• Yun Junho

Classifications

• H10K50/8426 Primary

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K59/8794

  Arrangements for heating and cooling · CPC title

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• H10K50/87 Primary

  Arrangements for heating or cooling · CPC title

• H10K77/111 Primary

  Flexible substrates · CPC title