Foldable Display Hinge Holder and Invar Support Plate
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Solution Overview
Problem
Conventional foldable display apparatuses experience buckling issues at the folding region due to repeated folding, which affects the durability and functionality of flexible displays.
Innovation Solution
A foldable display apparatus design featuring a hinge holder that moves between a restricted and enabled position to control the folding of a flexible display, utilizing multi-joint members and a support plate made of Invar alloy to prevent buckling, allowing the display to fold in one direction while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the flexible display is made thinner to improve flexibility, then flexibility is improved, but structural stability and resistance to buckling deteriorate
Solution Approach 1:
The patent employs a composite structure combining an Invar alloy support plate (rigid, low thermal expansion) with elastic multi-joint members (flexible, elastic recovery). This composite approach provides both structural stability to prevent buckling and the necessary flexibility for folding, resolving the contradiction between thin flexible display construction and structural stability.
Solution Approach 2:
The support plate is provided only at specific locations where buckling occurs, rather than throughout the entire display. The elastic multi-joint members are positioned at folding regions. This localized reinforcement provides structural stability where needed while maintaining overall flexibility and thin profile of the display.
2Strength
If the hinge holder restricts folding to prevent buckling, then structural integrity is improved, but folding freedom and versatility deteriorate
Solution Approach 1:
The hinge holder is designed to be movable between a first location that restricts folding (providing structural integrity) and a second location that enables folding (providing versatility). This dynamic repositioning allows the same structure to provide both protection during storage and freedom during use, resolving the contradiction between structural integrity and folding freedom.
Solution Approach 2:
The hinge holder is divided into multiple positions or segments that can be independently controlled. This segmentation allows selective restriction of folding at specific locations while maintaining freedom at other locations, providing both structural integrity and versatility through spatial differentiation.
3Ease of operation
If multi-joint members with elasticity are used to enable folding, then folding capability is improved, but resistance to deformation and buckling deteriorates
Solution Approach 1:
The patent combines elastic multi-joint members (which enable folding through elastic deformation) with a rigid Invar alloy support plate (which resists buckling and deformation). The support plate provides the structural stability that pure elastic components would lack, while still allowing controlled folding through the elastic joints, thus resolving the contradiction between folding capability and resistance to deformation.
Solution Approach 2:
The Invar alloy support plate acts as an intermediary structural element between the elastic multi-joint members and the flexible display. It mediates between the flexibility needed for folding and the stability needed to prevent buckling, transferring and distributing mechanical stresses to maintain both folding capability and deformation resistance.
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
The solution effectively prevents buckling and ensures smooth, reliable folding and unfolding of the display, enhancing its durability and usability by restricting folding to a single direction and using elastic multi-joint members with a rigid support plate.
Implementation Method 1
a support plate configured to support the flexible display, wherein the support plate includes an Invar alloy
Implementation Method 2
a plurality of multi-joint members that are successively arranged in a lengthwise direction of the flexible display, wherein the plurality of multi-joint members have elasticity
Data Source
AI summary
A foldable display apparatus includes a first housing, a second housing, a folding portion at a space between the first housing and the second housing to connect the first housing to the second housing so that the first and second housings are configured to be folded with respect to each other, a flexible display including a contraction surface supported by the first housing, the second housing, and the folding portion, and a tensile surface configured to display images, and a hinge holder configured to move between a first location for inhibiting folding of the folding portion, and a second location for enabling folding of the folding portion.