Display assembly with recycled content for an information handling system

Patent metadata

Field	Value
Publication number	US-11628661-B2
Application number	US-202117471779-A
Country	US
Kind code	B2
Filing date	Sep 10, 2021
Priority date	Sep 10, 2021
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

An increase in the amount of recycled plastic used in a display assembly can be obtained by introducing other types of plastic material that allow increasing the recyclable content beyond 25% without significantly lowering the strength properties of the plastic. The recycled plastic materials may be assembled together with a bio-based material. One example display assembly with higher recycled plastic content while maintaining sufficient plastic strength is an assembly having an external frame having 70% recycled PC ABS mixed with 30% fresh PPS (Polyphenylene Sulfide), a diffuser optical film having 60-80% recycled PET mixed with fresh PET, and a light guide path (e.g., plate) having 70% recycled PC mixed with fresh COP (Cyclo Olefin Polymers). The stiffness strength of the display assembly may further be improved by laminating the display assembly with biodegradable adhesives and/or edge-bonded with ultrasound or laser fusion.

First claim

The invention claimed is:

1. A display assembly for an information handling system, the display assembly comprising:
a front external frame and a back external frame;
a diffuser optical film layer comprising a polyethylene terephthalate (PET); and
a light guide plate layer comprising a second composition comprising a polycarbonate (PC), and a cyclo olefin polymer (COP),
wherein the diffuser optical film layer and the light guide plate layer are positioned between the front external frame and the back external frame, and
wherein the display assembly is constructed of a plurality of materials, wherein the plurality of materials have a recycled content of greater than 25% by weight of the display assembly, and wherein the plurality of materials include the polyethylene terephthalate, the polycarbonate, and the cyclo olefin polymer.

2. The display assembly of claim 1 , wherein at least one of the front external frame and the back external frame comprises a first composition comprising i) a blend comprising a first polycarbonate (PC) and an acrylonitrile butadiene styrene (ABS) polymer, and ii) a polyphenylene sulfide (PS).

3. The display assembly of claim 2 , wherein the first composition comprises 50 wt. % to 90 wt. % of the blend, and 10 wt. % to 50 wt. % of the polyphenylene sulfide.

4. The display assembly of any one of claim 2 , wherein the blend comprises 40 wt. % to 60 wt. % of the polycarbonate, and 60 wt. % to 40 wt. % of the ABS polymer.

5. The display assembly of claim 2 , wherein the blend has a recycled content of 90% to 100 wt. % of the blend.

6. The display assembly of claim 2 , wherein the polyphenylene sulfide has a recycled content less than 5 wt. % of the polyphenylene sulfide.

7. The display assembly of claim 1 , wherein at least one of the front external frame and the back external frame comprises steel comprising recycled content of 60 wt. % to 80 wt. % of the steel.

8. The display assembly of claim 1 , wherein the PET has recycled content of 60 wt. % to 80 wt. % of the PET.

9. The display assembly of claim 1 , wherein the light guide plate layer comprises 50 wt. % to 90 wt. % of the polycarbonate, and 10 wt. % to 50 wt. % of the cyclo olefin polymer.

10. The display assembly of claim 1 , wherein the polycarbonate has a recycled content of 90 wt. % to 100 wt. % of the polycarbonate.

11. The display assembly of claim 1 , wherein the cyclo olefin polymer has a recycled content less than wt. 5% of the cyclo olefin polymer.

12. The display assembly of claim 1 , wherein the plurality of materials have a recycled content of between 25% to 60% by weight of the display assembly.

13. The display assembly of claim 1 , further comprising one or more additional layers selected from a polarizing film layer, a liquid crystal display (LCD) module layer, polarizing film layer, a prism sheet layer, a reflector sheet layer, and a backlight module layer.

14. The display assembly of claim 1 , wherein one or more layers of the display assembly are laminated with a biodegradable adhesive.

15. The display assembly of claim 1 , wherein edges of the one or more layers of the display assembly are bonded with ultrasound and/or laser fusion.

16. An information handling system, comprising:
a display assembly, comprising:
a front external frame and a back external frame, at least one of the front external frame and the back external frame comprising a first composition comprising i) a blend comprising a first polycarbonate (PC) and an acrylonitrile butadiene styrene (ABS) polymer, and ii) a polyphenylene sulfide (PS);
a diffuser optical film layer comprising a polyethylene terephthalate (PET); and
a light guide plate layer comprising a second composition comprising a second polycarbonate (PC), and a cyclo olefin polymer (COP),
wherein the display assembly is constructed of a plurality of materials, wherein the plurality of materials have a recycled content of greater than 25% by weight of the display assembly, and wherein the plurality of materials include the polyethylene terephthalate, the polycarbonate, and the cyclo olefin polymer.

17. The information handling system of claim 16 , wherein the plurality of materials have a recycled content of between 25% to 60% by weight of the display assembly.

Assignees

• Dell Products Lp

Inventors

• Aurongzeb Deeder M
• Goh Peng Lip
• Mok Fook Weng
• Wang Kevin

Classifications

• B32B2307/42

  Polarizing, birefringent, filtering · CPC title

• B32B2272/00

  Resin or rubber layer comprising scrap, waste or recycling material · CPC title

• B32B27/325

  comprising polycycloolefins · CPC title

• B32B27/286

  comprising polysulphones; polysulfides · CPC title

• B32B2307/416

  Reflective · CPC title