Shielding Members for Foldable Display Digitizer Reactance
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Solution Overview
Problem
The performance of flexible displays in foldable electronic devices deteriorates due to magnetization regions in the support members, which can cause reactance increases in the digitizer, preventing normal function.
Innovation Solution
The use of shielding members with high magnetic permeability is implemented on the folding axis of the hinge module adjacent to the magnetization regions of the support members, reducing performance degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conductive material is used for support members to provide structural strength, then the support members can be magnetized by external magnetic force, but this magnetization causes reactance increase in the digitizer and deteriorates flexible display performance
Solution Approach 1:
A shielding member with high magnetic permeability is introduced as an intermediary component between the magnetized support member and the digitizer. This shielding member redirects the magnetic flux generated by the magnetized support member away from the digitizer, preventing the harmful reactance increase while allowing the support member to maintain its structural strength and magnetization properties.
Solution Approach 2:
The harmful magnetic field effect is extracted and isolated from the digitizer by placing the shielding member between the magnetized support member and the digitizer. The shielding member captures and contains the magnetic flux, effectively removing the harmful interaction from the digitizer's operating environment while preserving the support member's functionality.
2Reliability
If shielding member with high magnetic permeability is added to shield magnetization regions, then digitizer performance is maintained, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The shielding member is strategically positioned only at specific locations where magnetization occurs (such as near hinge modules or where conductive support members are present), rather than covering the entire device. This localized approach provides effective shielding where needed while minimizing the overall complexity and material usage of the device structure.
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 solution effectively reduces the performance degradation of the flexible display by shielding the magnetization regions, ensuring normal functioning of the digitizer.
Implementation Method 1
A magnetization region of the first support member and/or the second support member may be shielded using a shielding member having a high magnetic permeability
Data Source
AI summary
According to various embodiments of the disclosure, an electronic device may include: a hinge plate coupled at least in part between a first support including a first magnet and a second support including a second magnet, a first housing coupled at least in part to a first side of the hinge plate through the first support, a second housing coupled at least in part to a second side of the hinge plate through the second support and configured to be foldable with the first housing through the hinge plate, and a flexible display supported on the first and second supports and configured to be foldable. The flexible display may include: a display panel; a support plate disposed on a lower surface of the display panel; a first digitizer and a second digitizer disposed on a lower surface of the support plate spaced apart from each other through a second gap; a first-first shielding member comprising a magnetic shielding material and a first-second shielding member comprising a magnetic shielding material disposed on lower surfaces of the first and second digitizers spaced apart from each other through a third gap; a first metal plate and a second metal plate disposed on lower surfaces of the first-first and first-second shielding members spaced apart from each other through a fourth gap; a third-first shielding member comprising a magnetic shielding material disposed on an upper surface of a first magnetization region of the first support in a first space between the first metal plate and the first support, and a third-second shielding member comprising a magnetic shielding material spaced apart from the third-first shielding member through a sixth gap and disposed on an upper surface of a second magnetization region of the second support in a second space between the second metal plate and the second support; and a fourth-first shielding member comprising a magnetic shielding material disposed on an upper surface of the third-first shielding member and surrounding at least a portion of the third-first shielding member through the sixth gap, and a fourth-second shielding member comprising a magnetic shielding material spaced apart from the fourth-first shielding member through the sixth gap, disposed on an upper surface of the third-second shielding member, and surrounding at least a portion of the third-second shielding member through the sixth gap.