Amorphous Nickel Alloy Support Plate for Foldable Display Digitizer
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Solution Overview
Problem
Current display devices with digitizers face challenges in achieving high sensitivity for external inputs and flexibility, particularly in foldable electronic devices where components need to maintain both sensitivity and structural integrity during folding operations.
Innovation Solution
Incorporating an amorphous nickel alloy support plate with a non-magnetic property, containing 50 wt % to 95 wt % nickel and up to 3 wt % iron, which provides a tensile strength of 1000 MPa to 2000 MPa and a tensile strain of 1% to 3%, enhancing the digitizer's sensitivity and allowing for improved folding characteristics by defining openings in the support plate and lower support plate to optimize structural support and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a magnetic metal support plate is used to provide structural support, then the structural strength is improved, but the digitizer sensitivity to external inputs deteriorates due to magnetic interference
Solution Approach 1:
The support plate material is changed from a magnetic metal to a non-magnetic amorphous nickel alloy, fundamentally changing the magnetic parameter from magnetic to non-magnetic. This eliminates the magnetic interference that was degrading digitizer sensitivity while maintaining the required structural strength of 1000-2000 MPa through the amorphous alloy's inherent mechanical properties
Solution Approach 2:
The invention uses an amorphous nickel alloy composite material that combines nickel (50-95 wt%), iron (0-3 wt%), and other elements to achieve a unique property combination: non-magnetic behavior for digitizer compatibility and high tensile strength (1000-2000 MPa) for structural support. This composite material simultaneously resolves both requirements
2Strength
If a rigid support structure is used to maintain structural integrity, then the strength is improved, but the flexibility and folding capability deteriorate
Solution Approach 1:
The support plate is designed as a thin, flexible amorphous nickel alloy film rather than a rigid structure. This flexible film maintains structural integrity through its high tensile strength (1000-2000 MPa) while allowing the display device to fold and bend, enabling foldable device applications
Solution Approach 2:
The material parameters of the support plate are optimized with tensile strength of 1000-2000 MPa and tensile strain of 1-3%, creating a material that is both strong and sufficiently ductile to accommodate folding operations without fracture, thus achieving both structural integrity and folding capability
3Strength
If the support plate is made solid to maximize strength, then the tensile strength is improved, but the flexibility and sensitivity deteriorate
Solution Approach 1:
The support plate is segmented by forming openings (through-holes or recesses) in the amorphous nickel alloy plate. This segmentation reduces the overall material density while maintaining structural integrity through the remaining alloy framework, improving flexibility without significantly compromising tensile strength
Solution Approach 2:
The support plate incorporates a porous structure with openings distributed throughout the amorphous nickel alloy. This porous design reduces the effective stiffness and improves flexibility while the high-strength amorphous alloy material maintains adequate tensile strength (1000-2000 MPa) for structural support
Data Source
AI summary
A display device according to an embodiment includes a digitizer, a display module disposed on the digitizer, and a support plate disposed between the digitizer and the display module, the support plate including an amorphous nickel alloy, and a range of about 50 wt % to about 95 wt % of nickel is included in the amorphous nickel alloy based on a total weight of the amorphous nickel alloy. The support plate has a non-magnetic property and a flexible property.