Cover Window Thickness Variation for Display Panel Buckling
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Solution Overview
Problem
Display panels with curved surfaces face buckling issues when attached to cover windows, particularly due to thickness variations in the curved areas, which can lead to structural integrity problems and increased risk of damage during manufacturing and use.
Innovation Solution
A display device design featuring a cover window with strategically varying thickness in its curved areas, where the second curved area has a thickness less than the first, and uniform or decreasing thickness in other areas, to prevent buckling and enhance structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a cover window with curved areas is attached to a display panel, then aesthetic appeal and design flexibility are improved, but buckling occurs due to thickness variations in the curved areas
Solution Approach 1:
The cover window is designed with non-uniform thickness distribution, where the first curved area has a first thickness and the second curved area has a second thickness that is less than the first thickness. This local variation in thickness allows different regions of the cover window to have optimized mechanical properties, reducing stress concentration and preventing buckling of the display panel while maintaining the desired curved aesthetic appearance.
Solution Approach 2:
The patent changes the thickness parameter of the cover window in different regions. By adjusting the thickness from the first thickness in the first curved area to the second thickness in the second curved area, the mechanical strength and flexibility are optimized to prevent buckling while achieving the curved design goal.
2Ease of manufacture
If uniform thickness is used in the cover window, then manufacturing simplicity is improved, but structural integrity deteriorates due to increased buckling risk in curved areas
Solution Approach 1:
Instead of using uniform thickness throughout, the cover window employs local quality variation with different thicknesses in different curved areas. This approach maintains relatively simple manufacturing processes while significantly improving structural integrity by strategically placing thicker regions where strength is needed and thinner regions where flexibility is beneficial.
3Reliability
If the cover window has varying thickness in curved areas, then resistance to buckling is improved, but manufacturing complexity increases
Solution Approach 1:
The patent implements parameter changes by varying the thickness parameter across different regions of the cover window. This controlled variation in a single parameter (thickness) achieves improved buckling resistance without introducing excessive complexity, as the overall structure and material composition remain consistent.
Data Source
AI summary
A display device includes a display panel including corner areas and a cover window, where the display panel includes a substrate and a plurality of pixels on the substrate, the substrate including a display area, a first peripheral area, and a second peripheral area. The display area includes a front display area, a corner display area and a side display area, the cover window includes a flat area and a curved area, the curved area includes a first curved area overlapping the corner display area and a second curved area extending from the first curved area, and the thickness of the second curved area is less than the thickness of the first curved area.