Foldable Display Layer Alignment via Hinge Engagement
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Solution Overview
Problem
Folding display devices experience positional shifts between stacked layers, leading to flexural issues in the display surface, which can result in buckling and degradation of display quality.
Innovation Solution
A display device with a foldable display module and a case having a hinge and bezels with slide mechanisms and engaging portions that maintain the uppermost layer parallel during folding, preventing positional shifts and buckling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display device is folded, then the display region can be increased and portability improved, but positional shifts between stacked layers occur causing display surface flection
Solution Approach 1:
The display device is divided into multiple stacked functional layers (display panel, adhesive layers, polarizer, window), with each layer capable of independent sliding movement. This segmentation allows each layer to accommodate folding deformation separately, preventing cumulative misalignment and flection of the display surface.
Solution Approach 2:
The adhesive layers are designed with dynamic characteristics that allow them to deform and slide during folding operations. This dynamic behavior enables the layers to adjust their relative positions during folding, maintaining proper alignment and preventing display surface flection while still providing adequate adhesion.
2Device complexity
If the hinge is positioned lower, then the device structure is simplified, but the uppermost layer cannot be properly pulled parallel during opening
Solution Approach 1:
The hinge is repositioned from a conventional lower position to an elevated position above the uppermost layer of the display module. This spatial repositioning in the vertical dimension enables the hinge to effectively pull the uppermost layer parallel during the opening transition, ensuring proper layer alignment without compromising structural simplicity.
3Ease of manufacture
If the cover portion does not engage with the uppermost layer, then the manufacturing process is simplified, but positional shifts and buckling occur during folding
Solution Approach 1:
The cover portion is designed with engaging portions that预先 (in advance) engage with corresponding engaged portions on the uppermost layer before folding occurs. This preliminary engagement prevents positional shifts and buckling during folding operations by maintaining layer alignment, while the engagement structure remains simple enough not to significantly complicate the manufacturing process.
Data Source
AI summary
A display device according to one aspect of the present disclosure can undergo selection between a closed state where a case housing a display module renders bezels adjacent to each other with a hinge interposed therebetween, and an open state where the case renders the bezels spaced from each other with the hinge interposed therebetween, the display module has an uppermost layer (window film) provided with an engaged portion with which an engaging portion provided in a cover portion of each bezel can engage, and in conjunction with the opening of the case, the engaging portion engages with the engaged portion and pulls the uppermost layer in such manner the uppermost layer is in parallel.