Cold-Formed Curved Glass Backing to Reduce Optical Distortion
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Solution Overview
Problem
Current methods for forming curved glass substrates for vehicle interiors are costly and prone to optical distortion and surface marking, with adhesive layers experiencing shear and tensile stress, limiting the durability and flexibility of displays.
Innovation Solution
A cold forming method using a forming apparatus with moveable linkages and a structural tape bonding medium, which eliminates the need for a pre-fabricated frame and uniform adhesive thickness, reducing tensile stress and enabling dynamic movement and flexibility of the glass substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If thermal forming is used to form curved glass substrates, then the glass can be shaped, but high cost, optical distortion and surface marking occur
Solution Approach 1:
The patent changes the temperature parameter from high (thermal forming) to low (cold forming), and changes the forming mechanism from thermal softening to mechanical deformation through bonding medium and form, thereby avoiding optical distortion and surface marking while achieving curved shape
2Shape
If thermal forming is used to form curved glass substrates, then the glass can be shaped, but the process becomes costly
Solution Approach 1:
The patent changes the temperature parameter from high (thermal forming) to low (cold forming), eliminating expensive thermal processing equipment and energy costs, thereby reducing manufacturing cost while achieving the same curved shape
Solution Approach 2:
The patent replaces thermal field (heat) with mechanical field (bonding medium and form), substituting thermal forming process with cold forming process, which reduces equipment complexity and manufacturing cost
3Shape
If adhesive layer is used to adhere glass to form, then the glass can be curved, but the adhesive is subject to both shear and tensile stress
Solution Approach 1:
The patent creates a localized stress environment where the bonding medium is compressed between the form and glass substrate, concentrating compressive stress in the bonding medium while the adhesive layer primarily experiences shear stress, thereby reducing tensile stress on the adhesive
Solution Approach 2:
The patent introduces a bonding medium as an intermediary layer between the form and glass substrate, which absorbs compressive stress and protects the adhesive layer from direct tensile and shear stress, thereby improving adhesive layer strength
4Shape
If pre-fabricated form is adhered to glass, then the glass can be curved, but the form becomes part of the final product increasing complexity
Solution Approach 1:
The patent extracts the form from the final product structure, using it only as a temporary tool during the curving process, and then removing it, thereby reducing device complexity while maintaining the curved shape of the glass substrate
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for cost-effective, stress-reduced, and flexible formation of curved glass substrates for vehicle displays, enhancing durability and usability by reducing adhesive stress and enabling dynamic bending capabilities.
Implementation Method 1
cold forming glass
Implementation Method 2
applying a desired force to compress the adhesive and deform the glass substrate
Implementation Method 3
The bonding medium can comprise one or more of VHB tape, foam tape, rigid polymer, compliant polymer or fully or partially cured structural adhesive
Data Source
AI summary
The disclosure relates to forming methods, systems, apparatuses and resulting displays that represent improvements in various key areas. The disclosed methods, systems and apparatuses can include a backing configured to support the glass substrate. In one embodiment, the backing can comprise a plurality of linkages. The one or more of the plurality of linkages are selectively moveable to interface with and correspond to a radius of curvature of the curved portion of the glass substrate. However, other embodiments contemplate segments, mesh or other construction for the backing.