Display Device Non-Display Area Crack Prevention and Alignment Key Integration
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Solution Overview
Problem
Flexible display devices face challenges in minimizing the non-display area while maintaining structural integrity, particularly during bending or curvature, due to the need for crack prevention patterns and alignment keys that occupy space without compromising the display area.
Innovation Solution
The display device incorporates a substrate with a display area surrounded by a non-display area featuring multiple crack prevention patterns and alignment keys, where the alignment key is strategically placed between the crack prevention patterns, reducing the overall non-display area by eliminating the need for separate spaces for the alignment key within the crack prevention patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If separate spaces for alignment key and crack prevention patterns are provided in the non-display area, then structural integrity and alignment precision are maintained, but the non-display area size increases
Solution Approach 1:
The alignment key and crack prevention patterns are integrated into a single unified structure in the non-display area. The alignment key is positioned between the crack prevention patterns, allowing both functions to coexist in the same spatial region rather than requiring separate dedicated spaces, thereby reducing the overall non-display area while maintaining both alignment precision and structural integrity
Solution Approach 2:
The non-display area structure serves multiple functions simultaneously: the crack prevention patterns prevent substrate cracking during bending, the alignment key ensures precise positioning, and their integrated arrangement optimizes space utilization. This multi-functional design allows the same structural region to fulfill both protective and alignment roles without requiring additional separate components
2Reliability
If multiple crack prevention patterns are added to prevent substrate cracking, then structural reliability improves, but the non-display area occupies more space
Solution Approach 1:
The crack prevention structure is divided into multiple discrete patterns (first, second, and third crack prevention patterns) arranged at different positions in the non-display area. These segmented patterns provide comprehensive crack prevention coverage while allowing efficient spatial arrangement with the alignment key positioned between them, optimizing the use of available non-display area
Solution Approach 2:
The crack prevention patterns are arranged in multiple layers or positions (first pattern at one position, second pattern at another position, third pattern at a third position) rather than requiring extensive horizontal spacing. This multi-dimensional arrangement allows comprehensive crack prevention while minimizing the overall footprint of the non-display area
Data Source
AI summary
A display device includes a substrate having a display area and a non-display area surrounding the display area, a driving unit connected to the substrate, at least one first crack prevention pattern at the non-display area, the at least one first crack prevention pattern including facing end portions, and an alignment key at the non-display area, at least a portion of the alignment key being between the facing end portions of the at least one first crack prevention pattern.