Expandable Display Support Structure for Flatness and Sliding Durability
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Solution Overview
Problem
Flexible display devices with expandable surfaces face issues of visible bending due to lower structural support, affecting surface quality and requiring complex structures.
Innovation Solution
A display device design featuring a display module with distinct regions supported by layers of varying adhesive materials and hole groups, including optically clear resin and pressure-sensitive adhesive layers, to enhance rigidity and minimize visible bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lower structure supports the display panel in expandable flexible display devices, then the display panel can be folded and expanded, but bending becomes visible on the display surface
Solution Approach 1:
The support structure is segmented into multiple discrete support bars arranged in arrays, rather than a continuous lower structure. This segmentation allows the display panel to fold between the bars while maintaining surface flatness in the unfolded state, resolving the contradiction between foldability and surface flatness.
Solution Approach 2:
Different regions of the display device have different structural properties - the display area has a segmented support structure for flatness, while the non-display areas have different support characteristics. This local differentiation allows the display surface to remain flat while enabling folding functionality in appropriate regions.
2Adaptability or versatility
If a complex structure is used to support the display panel for folding, then folding functionality is achieved, but the structure becomes complicated
Solution Approach 1:
The support structure is divided into multiple simple support bars rather than one complex continuous structure. Each bar is independent and simple in form, but collectively they provide the required sliding and folding functionality, reducing overall structural complexity while maintaining adaptability.
Solution Approach 2:
The segmented support bar structure serves multiple functions simultaneously: it provides mechanical support for the display panel, enables folding operations, facilitates sliding movements, and maintains surface flatness. This multi-functionality reduces the need for separate components, simplifying the overall structure.
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A display device includes a display module including first, second, and third regions sequentially arranged in a first direction, a first support layer that includes hole groups spaced apart from each other in the first direction and is disposed under the display module overlapping the first region, a first adhesive layer disposed between the first region and the first support layer, a second support layer disposed under the display module overlapping the second region, a second adhesive layer disposed between the second region and the second support layer, and multi-bars disposed at under of the first support layer and spaced apart from each other in the first direction. The first adhesive layer includes at least one first resin layer, and second resin layers overlapping a corresponding hole group and having a higher modulus than the first resin layer.