Foldable Display Hinge Structure for Wrinkle-Reduced Folding
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Solution Overview
Problem
Existing electronic devices with foldable displays face issues such as wrinkle formation and instability during folding due to the stress generated by the hinge structure's rotational axes.
Innovation Solution
The electronic device incorporates a hinge structure with a rotating member and a supporting member, each rotating along distinct axes. The supporting member is designed to rotate along a guide rail, allowing for a different rotation angle range compared to the rotating member, which helps in reducing stress and instability during folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the hinge structure uses a single rotational axis for both housing and display support, then the structure is simpler, but stress concentration causes display damage and wrinkle formation
Solution Approach 1:
The hinge structure is divided into two independent rotational components: a first rotational member for housing rotation and a second rotational member for display support. This segmentation allows each component to rotate independently around its own axis, distributing stress away from the display and preventing wrinkle formation while maintaining structural simplicity.
2Stability of the object's composition
If the rotational axis of the housing is fixed, then the structure is more stable, but stress changes cause display damage during folding
Solution Approach 1:
The housing rotation and display support functions are segmented into separate rotational members with different fixed axes. The first rotational member provides stable housing rotation around a first axis, while the second rotational member independently supports the display around a second axis, preventing stress transmission to the display.
3Object-affected harmful factors
If the rotational axis of the housing is changed or variable, then display damage is reduced, but housing rotation becomes unstable during folding
Solution Approach 1:
Both the housing rotation and display support use fixed rotational axes rather than variable ones. The first rotational member rotates the housing around a fixed first axis for stability, while the second rotational member rotates the display around a fixed second axis, preventing stress concentration and maintaining both stability and display protection.
Data Source
AI summary
An electronic device includes: a first housing; a second housing; a hinge structure which pivotally connects the first housing and the second housing to each other; and a display which is disposed across the hinge structure, wherein the hinge structure includes: a hinge bracket which includes a rotary rail and a guide rail spaced apart from the rotary rail; a rotating member which includes a sliding pin and is coupled to the first housing; and a support member which includes a sliding opening and a guide groove, and supports one surface of the display.