Folding Display Sub-Support Groove Design
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Solution Overview
Problem
Folding display devices experience increased deformation over time due to repeated folding and unfolding, leading to variations in structure and dimension at the folding part, which can be undesirable.
Innovation Solution
A display device design featuring a display module with non-folding and folding portions, supported by a sub-support part and adhesive, where the sub-support part has a narrower width than the display module, creating grooves between the folding and support parts to reduce deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display module is folded repeatedly, then the portability and flexibility are improved, but the deformation amount of the folding part increases
Solution Approach 1:
The support part is divided into a first support part corresponding to non-folding portions and a second support part corresponding to the folding portion. This segmentation allows each support part to be optimized independently - the first support part provides stable support for rigid sections while the second support part accommodates the folding section's movement, thereby reducing deformation of the folding part during repeated folding operations
Solution Approach 2:
Different support structures are provided for different regions of the display module. The first support part has a structure optimized for non-folding portions while the second support part has a structure optimized for the folding portion. This local differentiation ensures that each region receives appropriate support characteristics - rigidity where needed and flexibility where folding occurs - minimizing overall deformation
2Strength
If the support part covers the entire folding portion, then the support is maximized, but the deformation variation is increased
Solution Approach 1:
The second support part corresponds to only a portion of the folding portion rather than the entire folding portion. This partial support approach is sufficient to provide the necessary support to reduce deformation variation, while avoiding excessive support that would constrain the natural folding movement and increase deformation variation
3Area of stationary object
If the sub-support part has the same width as the display module, then the support coverage is maximized, but the grooves for reducing deformation are not formed
Solution Approach 1:
The sub-support part is designed with a width less than that of the display module, creating localized support rather than uniform support across the entire width. This localized support configuration allows grooves to form between the support part and display module at the edges, and these grooves are specifically positioned to reduce deformation in critical areas without requiring full-width support coverage
Data Source
AI summary
A display device includes a display module including a plurality of non-folding portions arranged along a first direction, and a folding portion disposed between the non-folding portions; a support part facing each of the non-folding portions and the folding portion; an adhesive between the support part and each of the non-folding portions, respectively; and a sub-support part between the folding portion and the support part. Along a second direction crossing the first direction, a first width of the sub-support part is less than a second width of the display module.