Bi-Directional Foldable Display Hinge for Panel Stress Relief
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Solution Overview
Problem
Existing foldable display apparatuses are limited to one-directional folding, and the repeated folding in both directions causes damage and stress to the display panel, leading to potential cracks and reduced durability.
Innovation Solution
A bi-directional hinge structure with a mid bar, flap bars, cams, and gear arms that allow both in-folding and out-folding, incorporating a rounded corner and omega shape to manage stress and pressure, and a support mechanism to minimize damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a one-directional hinge structure is used, then the structure is simple, but it cannot implement both in-folding and out-folding
Solution Approach 1:
The hinge assembly is divided into multiple independent components: a first hinge unit for in-folding and a second hinge unit for out-folding. Each hinge unit can rotate independently around the display panel, allowing the display apparatus to achieve both in-folding and out-folding capabilities without requiring a completely complex integrated mechanism.
Solution Approach 2:
The hinge assembly is designed as a universal structure that can perform multiple folding functions. By integrating both the first hinge unit (enabling in-folding) and the second hinge unit (enabling out-folding) into a single hinge assembly, the system achieves multi-functionality where one assembly supports both folding directions.
2Adaptability or versatility
If repeated in-folding and out-folding are performed, then the display apparatus is versatile, but the display panel suffers from stress and potential cracks
Solution Approach 1:
A support structure is provided that includes a support member positioned to contact the display panel at the folding region. This support member acts as a cushioning element that prevents excessive stress concentration on the display panel during repeated in-folding and out-folding operations, thereby protecting the panel from cracks and damage before they can occur.
Solution Approach 2:
The support member serves as an intermediary element between the hinge assembly and the display panel. It mediates the stress transfer by providing a protective interface that reduces the direct mechanical stress on the display panel during folding operations, allowing repeated folding without compromising panel integrity.
3Volume of moving object
If the display panel is folded with a small radius of curvature, then the folded size is compact, but excessive stress is applied to the display panel
Solution Approach 1:
The support member is positioned to provide cushioning support at the folding region before excessive stress can develop. This prevents the display panel from experiencing harmful stress even when folded with a relatively small radius of curvature, allowing compact folding without compromising panel integrity.
Data Source
AI summary
A foldable display apparatus includes: a display panel; first and second set housings arranged in a first direction and supporting the display panel; and a hinge assembly disposed between and connected to the first and second set housings. The hinge assembly is configured to: rotate the first and second set housings inward to in-fold the display panel so that the display panel is disposed between the first set housing and the second set housing; rotate the first and second set housings outward to out-fold the display panel so that the first set housing and the second set housing are disposed between the out-folded display panel; and position the first and second set housings flat to unfold the display panel so that the display panel is flat on the first set housing, the second set housing, and the hinge assembly.