Ultra-thin display assembly with integrated touch functionality

Patent metadata

Field	Value
Publication number	US-10247972-B2
Application number	US-201313921900-A
Country	US
Kind code	B2
Filing date	Jun 19, 2013
Priority date	Jun 19, 2013
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

Methods for manufacturing an ultra-thin display assembly with integrated touch functionality may include edge bonding a laminate layer to a backlight portion of an LCD module. A display portion of the LCD module may be direct bonded to a cover glass including a transparent conductive electrode layer. The cover glass may be manufactured from a large glass sheet and may have an edge polymer deposited on edges of the cover glass, a conductive polymer layer over the transparent conductive electrode layer, and a smart polymer at the edges of the cover glass.

First claim

What is claimed is:

1. A display assembly for a portable information handling system, comprising:
a laminate cover having a thickness A that is fiber-strengthened using a carbon fiber laminate and forms an external surface of the portable information handling system;
a liquid crystal display (LCD) module having a thickness D edge bonded to the laminate cover using an adhesive applied only to edge surfaces of the LCD module such that a tolerance gap remains between a rear surface of the LCD module and the laminate cover, the LCD module including a backlight portion and a display portion, wherein the laminate cover encloses the rear surface of the LCD module opposite a display surface of the LCD module; and
a cover glass having a thickness F direct bonded to the LCD module using an optically clear adhesive having a thickness E such that the display surface of the LCD module is bonded to the cover glass, the cover glass including a transparent conductive electrode layer,
wherein the display assembly has a total thickness P, including the thickness A of the laminate cover, the thickness D of the LCD module, the thickness E of the optically clear adhesive, and the thickness F of the cover glass, and wherein the display assembly has a stiffness corresponding to a deflection of the display assembly of less than 1% of a maximum span of the display assembly under a load of 98 N force at a center of the display assembly.

2. The display assembly of claim 1 , wherein a ratio of P/A is between 10.4 and 4.4, and wherein the laminate cover is fiber-strengthened using at least one of: a carbon fiber layer; a glass fiber layer; and an aramid fiber layer.

3. The display assembly of claim 1 , wherein a ratio of P/F is between 14.5 and 5.9, and wherein P is less than 4.8 mm.

4. The display assembly of claim 1 , wherein the transparent conductive electrode layer comprises indium tin oxide (ITO).

5. The display assembly of claim 1 , further comprising:
a foil layer having a thickness B between the laminate cover and the LCD module; and
a gap having a thickness C between the foil layer and the LCD module, wherein the total thickness P is 4.55 mm and wherein:
the thickness A is 0.8 mm;
the thickness B is 0.15 mm;
the thickness C is 0.2 mm;
the thickness D is 2.4 mm;
the thickness E is 0.3 mm; and
the thickness F is 0.7 mm.

6. The display assembly of claim 1 , wherein the cover glass includes an edge polymer applied at edge surfaces of the cover glass to stabilize cracks in the cover glass, and wherein the cover glass includes a conductive polymer layer applied over the transparent conductive electrode layer.

Assignees

• Meyers David Michael
• Aurongzeb Deeder Mohammad
• Dell Products Lp

Inventors

• Meyers David Michael
• Aurongzeb Deeder Mohammad

Classifications

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G02F1/133308 Primary

  Support structures for LCD panels, e.g. frames or bezels · CPC title

• G02F2202/28

  Adhesive materials or arrangements · CPC title

• G06F1/1643

  the display being associated to a digitizer, e.g. laptops that can be used as penpads (details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615) · CPC title

• G06F1/1613

  for portable computers (cooling arrangements therefor G06F1/203; constructional details or arrangements for pocket calculators, electronic agendas or books G06F15/0216; constructional details of portable telephone sets: with several bodies H04M1/0202) · CPC title