Enhanced liquid crystal display system and methods

• US 9,348,167 B2
• Filed: 03/18/2008
• Issued: 05/24/2016
• Est. Priority Date: 03/19/2007
• Status: Active Grant

• Current Assignee: VIA Optronics GmbH
• Original Assignee: VIA Optronics GmbH
• Inventors: Crouser, Maria Emma, Robinson, Andrew Mitchell, Doyle, Daniel R., Oehler, Peter Richard, Engle, T. Scott
• Primary Examiner(s): SCHATZ, CHRISTOPHER T
• Application Number:
  US12/050,845
• Publication Number:
  US 20080230177A1
• Time in Patent Office: 2,989 Days
• Field of Search: 156/275, 156/329, 156/327, 156/326, 156/324.4, 156/273.3, 156/275.5, 156/331.1, 156/235, 156/240, 156/241, 156/248, 156/250, 156/257, 156/265, 156/268, 156/277, 156/280, 156/291, 156/295, 156/69
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133311 Environmental protection, e.g. against dust or humidity
• CPC Class Codes: G02F 1/133331 Cover glasses
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133502 Antiglare, refractive index matching layers
• CPC Class Codes: G02F 2201/50 Protective arrangements
• CPC Class Codes: G02F 2201/503 Arrangements improving the resistance to shock
• CPC Class Codes: G02F 2202/025 thermocurable
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2852 Adhesive compositions

Abstract

Embodiments of methods and systems to generate an enhanced layered display system are described herein. In one embodiment, a method of generating an enhanced layered display system is provided including dispensing an optical bonding liquid onto a first substrate; forming an adhesive preform unit by curing the optical bonding liquid on the first substrate; and laminating the adhesive preform unit to a second substrate to form the enhanced layered display system, where one of the first substrate and the second substrate is a display.

Claims

1. A method of generating an enhanced layered display system, comprising:

dispensing a layer of an optical bonding liquid having optical properties onto a first substrate to form a bonding layer, where the first substrate is a glass or plastic overlay;

forming an adhesive preform unit by curing the optical bonding liquid on the first substrate where the adhesive preform unit comprises a shaped preform, where the shaped preform corresponds to a shape of a top surface of a display;

where the curing of the optical bonding liquid to form the adhesive preform unit occurs prior to introduction of the display;

laminating the adhesive preform unit to the display to form the enhanced layered display system;

wherein laminating the adhesive preform unit to the display includes laminating in a vacuum environment; and

where the first substrate is a protective overlay for the display;

positioning the first substrate in an adhesive pool;

filling the adhesive pool to a select level to create a uniform bond line thickness across the first substrate, wherein the optical bonding liquid is extended beyond a perimeter of the first substrate to create an excess preform perimeter;

curing the optical bonding liquid; and

cleaning the excess preform perimeter from the first substrate after curing the optical bonding liquid.

2. The method of claim 1, wherein the optical bonding liquid includes an adhesive, the adhesive index-matched to at least one of the first substrate or the display.

3. The method of claim 2, wherein the adhesive includes a two-part silicone adhesive.

4. The method of claim 1, wherein forming the adhesive preform unit comprises leveling the optical bonding liquid on the first substrate by drawing an edger across a top surface of the optical bonding liquid.

5. The method of claim 1, wherein forming the adhesive preform unit comprises thermally curing the optical bonding liquid at a temperature of at least 150°

C.

6. The method of claim 1, wherein the vacuum environment comprises creating a vacuum of at least 30 mm of Hg.

7. A method of generating an enhanced layered display system, comprising:

forming an adhesive preform unit on an overlay, forming the adhesive preform unit comprising;

positioning a first substrate in an adhesive pool,

thereafter filling the adhesive pool with an optical bonding liquid having optical properties to a select level to create a uniform bond line thickness across the first substrate, and

thermally curing the optical bonding liquid to form a bonding layer with a uniform surface;

thereafter placing the adhesive preform unit in a vacuum chamber;

placing a display unit in the vacuum chamber;

evacuating the vacuum chamber; and

bringing the adhesive preform unit in contact with the display unit to form the enhanced layered display system, once a vacuum has been achieved.

8. The method of claim 7, wherein forming the adhesive preform unit comprises thermally curing the optical bonding liquid at a temperature of at least 150°

C., and wherein evacuating the vacuum chamber comprises creating a vacuum of at least 30 mm of Hg deforming the adhesive preform unit.

9. The method of claim 7, wherein the adhesive pool has a depth corresponding to a depth of the bond line thickness.

10. The method according to claim 7, wherein the optical bonding liquid is fully cured in the adhesive pool.