Display Device Corner Strain Reduction via Segmentation
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Solution Overview
Problem
Display devices with images displayed on both the front surface and side surfaces experience high strain at the corners due to double curvature, which can lead to structural integrity issues and potential damage.
Innovation Solution
Incorporating cutout patterns and cutting grooves at the corners of the display device to reduce strain, with an organic layer covering particles only on the cutout patterns and not on the cutting grooves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If images are displayed on both front surface and side surfaces with double curvature, then display versatility is improved, but strain at corners increases causing structural integrity deterioration
Solution Approach 1:
The corner region is segmented by introducing cutout patterns and cutting grooves that divide the continuous structure into separate zones. This segmentation allows the corner to accommodate double curvature strain by creating discrete regions that can move independently, preventing stress concentration that would otherwise compromise structural integrity while maintaining display functionality across multiple surfaces
2Manufacturing precision
If organic layer is formed to cover particles on cutout patterns, then manufacturing precision is improved, but device complexity increases due to selective formation requirements
Solution Approach 1:
The organic layer is applied with local quality by forming it selectively only on the cutout patterns where particle coverage is needed, while leaving the cutting grooves uncovered. This localized formation approach achieves precise particle coverage exactly where required for display quality, while the selective nature of the process manages complexity by targeting specific regions rather than requiring uniform treatment across the entire device
Data Source
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AI summary
A display device includes: a substrate including a front surface, side surfaces extending from sides of the front surface, and a corner between the side surfaces; a first display area at the front surface and including a first pixel electrode, a first emissive layer disposed on the first pixel electrode, and a first common electrode on the first emissive layer; a second display area at the corner and including a second pixel electrode, a second emissive layer on the second pixel electrode, and a second common electrode on the second emissive layer; a first inorganic encapsulation layer on the first common electrode and the second common electrode; an organic encapsulation layer on the first inorganic encapsulation layer in the first display area; and a second inorganic encapsulation layer on the organic encapsulation layer in the first display area and on the first inorganic encapsulation layer in the second display area.