Foldable Display Window Width Variation for Strength and Dead Space
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Solution Overview
Problem
Foldable display devices face challenges in enhancing the strength of the folding area while minimizing dead space and maintaining adequate strength in the non-folding areas, as existing technologies often compromise on mechanical integrity due to structural limitations.
Innovation Solution
A foldable display device design featuring a display panel with a folding area and non-folding areas, where the folding area has a wider window and uncut surfaces, and the non-folding areas have cut surfaces, along with a reinforcing member at the cut surfaces, to achieve higher breaking strength at the folding area and reduced dead space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the window width is increased at the folding area, then the breaking strength at the folding area is improved, but the dead space increases
Solution Approach 1:
The window width is varied across different regions: it is wider at the folding area to enhance breaking strength (1-100 GPa) and narrower at the non-folding area to minimize dead space. This spatial variation in geometric properties directly implements the local quality principle to resolve the contradiction between strength enhancement and dead space reduction.
2Area of stationary object
If the window width is decreased at the non-folding area, then the dead space is reduced, but the strength at the non-folding area may be compromised
Solution Approach 1:
The window design implements different width characteristics in different regions: narrow width at non-folding areas minimizes dead space while maintaining adequate strength (100 MPa-1 GPa), and wide width at folding areas maximizes breaking strength. This regional differentiation resolves the contradiction between minimizing dead space and maintaining structural strength.
3Strength
If the window width is uniformly increased across all areas, then the breaking strength is improved, but the dead space and device complexity increase
Solution Approach 1:
Rather than uniform increase, the window width is strategically varied: wider at folding areas where strength is critical (achieving 1-100 GPa breaking strength) and narrower at non-folding areas to minimize dead space (maintaining 100 MPa-1 GPa strength). This localized optimization resolves the contradiction between overall strength improvement and dead space minimization.
Data Source
AI summary
A foldable display device is capable of improving a strength of a folding area and substantially reducing or minimizing a dead space of a non-folding area. The foldable display device includes: a display panel including a folding area and a non-folding area, and having a front surface and a back surface that are opposite each other; a window adjacent the front surface of the display panel; an auxiliary layer adjacent the back surface of the display panel; a first adhesive layer between the display panel and the window; and a second adhesive layer between the display panel and the auxiliary layer. A width of the window at the folding area is greater than a width of the window at the non-folding area.