Heat spreading substrate for a display

Patent metadata

Field	Value
Publication number	US-12431043-B2
Application number	US-202017911575-A
Country	US
Kind code	B2
Filing date	Apr 3, 2020
Priority date	Apr 3, 2020
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

The present disclosure is drawn to displays for electronic devices. In one example, the display includes a light emitting layer with an organic light emitting element. A porous substrate can be attached to the light emitting layer, wherein the porous substrate is flexible and spreads heat generated by the light emitting layer. A cover layer can be attached to a surface of the porous substrate opposite the light emitting layer.

First claim

What is claimed is:

1. A display for an electronic device comprising:
a light emitting layer with an organic light emitting element;
a porous substrate attached to the light emitting layer, wherein the porous substrate is flexible and spreads heat generated by the light emitting layer; and
a cover layer attached to a surface of the porous substrate opposite the light emitting layer; and
a carbon nanotube coating between the porous substrate and the cover layer.

2. The display of claim 1 , further comprising an adhesive adhering the porous substrate to the light emitting layer, wherein the adhesive spreads heat generated by the light emitting layer which is transferred to the porous substrate.

3. The display of claim 1 , further comprising a first electroless copper coating positioned between the porous substrate and the light emitting layer; and a second electroless copper coating between the porous substrate and the cover layer, wherein the first and the second copper coatings independently have an average thickness from about 0.5 μm to about 10 μm thick.

4. The display of claim 1 , wherein the carbon nanotube coating spreads heat from the porous substrate.

5. The display of claim 1 , wherein the porous substrate includes a polymeric material having a thickness from about 10 μm to about 0.7 mm.

6. The display of claim 5 , wherein the polymeric material includes polyurethane, polyethylene terephthalate (PET), polyester, polyethylene naphthalate (PEN), polycarbonate (PC), polyethersulfone (PES), polycyclic olefin (PCO), polyimide (PI), polyacrylate, polystyrene, polymethyl methacrylate (PMMA), silicone rubber, a copolymer thereof, or a combination thereof.

7. The display of claim 5 , wherein the polymeric material is doped with from about 0.05 wt % to about 2 wt % graphene.

8. The display of claim 1 , wherein the porous substrate has a porosity of about 50 wt % to about 95 wt % by volume.

9. The display of claim 1 , wherein the porous substrate includes a glass material having a thickness from about 0.1 mm to about 0.7 mm.

10. The display of claim 1 , wherein the porous layer is also a cushioning layer that absorbs impact energy.

11. An electronic device comprising:
an electronic component; and
a display electronically integrated with the electronic component, the display comprising:
a light emitting layer with an organic light emitting element;
a porous substrate attached to the light emitting layer, wherein the porous substrate is flexible and spreads heat generated by the light emitting layer; and
a cover layer attached to a surface of the porous substrate layer opposite the light emitting layer; and
a carbon nanotube coating between the porous substrate and the cover layer.

12. The electronic device of claim 11 , wherein the electronic device is a television, monitor, laptop, tablet computer, or smartphone.

13. The electronic device of claim 11 , wherein the organic light emitting element is an organic light emitting diode (OLED).

14. A method of making a display for an electronic device comprising:
forming a light emitting layer with an organic light emitting element;
adhering a porous substrate to the light emitting layer, wherein the porous substrate is flexible and spreads heat generated by the light emitting layer;
applying a carbon nanotube coating on a surface of the porous substrate; and
adhering a cover layer attached to a surface of the porous substrate layer opposite the light emitting layer.

15. The method of claim 14 , further comprising:
applying a first electroless copper coating between the porous substrate and the light emitting layer;
applying a second electroless copper coating between the porous substrate and the cover layer; and
applying a carbon nanotube coating between the second electroless copper coating and the cover layer, wherein the carbon nanotube coating spreads heat received from the porous substrate.

16. The display of claim 1 , wherein the carbon nanotube coating includes a first material comprises polyurethane, polyacrylic, polyester, elastomer, or a combination thereof.

17. The display of claim 16 , wherein the first material is combined with about 0.3 wt % to about 30.0 wt % carbon nanotube powders.

18. The electronic device of claim 11 , wherein the carbon nanotube coating includes a first material comprises polyurethane, polyacrylic, polyester, elastomer, or a combination thereof.

19. The electronic device of claim 18 , wherein the first material is combined with about 0.3 wt % to about 30.0 wt % carbon nanotube powders.

20. The method of claim 14 , wherein the carbon nanotube coating includes a first material comprises polyurethane, polyacrylic, polyester, elastomer, or a combination thereof.

21. A display for an electronic device comprising:
a light emitting layer with an organic light emitting element;
a porous substrate attached to the light emitting layer, wherein the porous substrate is flexible and spreads heat generated by the light emitting layer, and wherein the porous substrate includes a polymeric material having a thickness from about 10 μm to about 0.7 mm; and
a cover layer attached to a surface of the porous substrate opposite the light emitting layer.

22. A display for an electronic device comprising:
a light emitting layer with an organic light emitting element;
a porous substrate attached to the light emitting layer, wherein the porous substrate is flexible and spreads heat generated by the light emitting layer, and wherein the porous substrate includes a glass material having a thickness from about 0.1 mm to about 0.7 mm; and
a cover layer attached to a surface of the porous substrate opposite the light emitting layer.

Assignees

• Hewlett Packard Development Co

Inventors

• Wu Kuan-Ting
• Hsieh Hsing-Hung
• Chang Chi Hao

Classifications

• H10W40/257

  having a heterogeneous or anisotropic structure, e.g. powder or fibres in a matrix, wire mesh or porous structures (H10W40/254, H10W40/251 take precedence) · CPC title

• H10W40/255

  having a laminate or multilayered structure, e.g. direct bond copper [DBC] ceramic substrates · CPC title

• H10W40/25

  characterised by their materials · CPC title

• H10K50/87

  Arrangements for heating or cooling · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title