Floating Support Plates for Foldable Display Flatness
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Solution Overview
Problem
Portable information devices with foldable displays face issues due to level differences between chassis members, leading to waviness and instability of the display, caused by manufacturing and assembly tolerances.
Innovation Solution
A portable information device design featuring a hinge mechanism and support plates with floating parts that absorb level differences, ensuring the display is stably supported and maintained flat, even when chassis members have varying attachment points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If support plates are rigidly fixed to chassis members at both longitudinal ends, then structural stability is improved, but level differences due to manufacturing tolerances cause display waviness and curvature
Solution Approach 1:
The support plates are designed to be movable relative to the chassis members through sliding grooves and grooves, allowing the support plates to dynamically adjust their position and absorb level differences caused by manufacturing tolerances, thereby maintaining display flatness while preserving structural stability
Solution Approach 2:
The invention introduces degree of freedom parameters through the sliding mechanism, enabling the support plates to change their spatial parameters (position and orientation) to compensate for level differences, transforming the rigid fixed connection into a controlled movable connection that maintains both stability and precision
2Ease of manufacture
If rigid fixation is used at both longitudinal ends of support plates, then assembly simplicity is improved, but tolerance accumulation leads to display curvature
Solution Approach 1:
The sliding groove mechanism provides a simple yet effective dynamic adjustment capability that absorbs tolerance accumulation during assembly, allowing support plates to self-align and maintain display flatness without complex adjustment procedures
Solution Approach 2:
The support plates automatically adjust their positions through the sliding mechanism to compensate for manufacturing tolerances, enabling self-alignment and self-correction of level differences without requiring external adjustment or complex assembly procedures
Data Source
AI summary
A portable information device that can stably support a display is disclosed. The portable information device includes a first chassis member; a second chassis member; a hinge mechanism; a display whose back surface is supported by front surfaces of a first support plate and a second support plate; an alignment part that aligns the front surfaces between one edge of the first support plate and one edge of the second support plate adjacent to each other, in a flat form; a first support part that supports the first support plate relative to the first chassis member; and a second support part that supports the second support plate relative to the second chassis member. At least one of the first support part and the second support part includes a floating part that supports a corresponding support plate relative to a corresponding chassis member in a floating state.