Display module and display device

Patent metadata

Field	Value
Publication number	US-12563892-B2
Application number	US-202117529996-A
Country	US
Kind code	B2
Filing date	Nov 18, 2021
Priority date	Dec 24, 2020
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

A display module and a display device which can improve a heat-dissipation performance and a shock absorption function while reducing a bezel area include a cushion plate with a metal foam that has both a heat-dissipation function and a cushion function, so that both of an effective heat-dissipation function and an effective cushion function can be realized only using the metal foam without addition of a separate heat-dissipation layer or cushion layer. Further, the metal foam of the cushion plate has very excellent heat-dissipation function and cushioning function at only a small thickness thereof, so that a total thickness of the cushion plate can be greatly reduced, and the bezel area can be reduced.

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 of the display panel, the pad portion of the display panel disposed under a lower surface of the front portion of the display panel; a cushion plate disposed under the display panel and between the front portion and the pad portion; and a bent panel fixing member configured to fix the pad portion to the cushion plate, wherein the cushion plate includes a first adhesive layer, a base substrate, a second adhesive layer, a metal foam, and a metal foil in a sequential layer stack, wherein the metal foam of the cushion plate is disposed under the adhesive layer of the cushion plate, wherein the metal foam of the cushion plate has a porous metal structure having a plurality of pores, and wherein the metal foil is disposed on a lower surface and on a side surface of the metal foam of the cushion plate to cover an entirety of an outer surface of the metal foam of the cushion plate and the second adhesive layer is directly disposed on a top surface of the metal foam.

2 . The display module of claim 1 , wherein the adhesive layer includes an embossed layer having a base substrate, a first adhesive layer, and a second adhesive layer,
the first adhesive layer and the second adhesive layer of the embossed layer respectively disposed on opposing surfaces of the base substrate of the embossed layer, wherein the first adhesive layer of the embossed layer has an embossed pattern, wherein the second adhesive layer of the embossed layer is coupled to the metal foam of the cushion plate.

3 . The display module of claim 1 , wherein the metal foil is additionally disposed on an upper surface of the metal foam of the cushion plate, and the metal foam is sealed with the metal foil.

4 . The display module of claim 1 , wherein the metal foam of the cushion plate includes:
a first metal foam layer; a second metal foam layer; and the metal foil additionally disposed between the first metal foam layer and the second metal foam layer.

5 . The display module of claim 4 , wherein the second metal foam layer is sealed with the metal foil.

6 . The display module of claim 4 , wherein the metal foil is additionally disposed on an upper surface of the metal foam.

7 . The display module of claim 6 , wherein the first metal foam layer and the second metal foam layer of the metal foam are sealed with the metal foil.

8 . The display module of claim 1 , wherein an Ag paste is disposed under a lower surface of the metal foam of the cushion plate.

9 . The display module of claim 1 , wherein a heat-dissipation ink layer is disposed on a lower surface and a side surface of the metal foam of the cushion plate.

10 . The display module of claim 1 , wherein a thickness of the metal foam of the cushion plate is in a range of 20 μm to 200 μm.

11 . The display module of claim 1 , wherein a thickness of the cushion plate is in a range of 80 μm to 260 μm.

12 . The display module of claim 1 , further comprising:
a driving integrated circuit disposed under the pad portion of the display panel.

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

14 . A display device, comprising:
a cover member; a display module coupled to the cover member; and a frame disposed under the display module configured 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 disposed under the front portion;
a cushion plate including a metal foam, an adhesive layer, and a metal foil, wherein the adhesive layer includes a plurality of embossed patterns being a plurality of protrusions at an upper surface of the adhesive layer; and
a bent panel fixing member configured to fix a portion of the display panel to the cushion plate,
wherein the cushion plate is disposed between the front portion and the pad portion,
wherein the metal foam of the cushion plate has a porous metal structure having a plurality of pores,
wherein the metal foil disposed on a lower surface and on a side surface of the metal foam of the cushion plate to cover an entirety of an outer surface of the metal foam of the cushion plate, and
wherein the adhesive layer of the cushion plate is disposed on an upper surface of the metal foam.

Assignees

• Lg Display Co Ltd

Inventors

• Park Chanhyeok
• Sung Chikyung

Classifications

• H10K59/8794

  Arrangements for heating and cooling · CPC title

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B2255/062

  metal layer being a foamed layer · CPC title

• B32B2307/7376

  Thickness · CPC title