Display Device Multilayer Routing to Reduce Non-Display Area
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Solution Overview
Problem
Existing display devices have a significant non-display area that reduces their functionality and can lead to degradation of display quality, particularly in organic light emitting displays.
Innovation Solution
The display device incorporates a novel design with multiple layers of connection lines and dummy patterns that minimize the non-display area by optimizing the layout of signal and connection lines, ensuring they extend in different directions and are connected through contact holes, while using conductive layers to maintain electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If driving circuits are arranged in a non-display area adjacent to the display area, then the display device has sufficient space for circuit operations, but the non-display area increases reducing functionality
Solution Approach 1:
The patent applies dimensionality change by routing connection lines from the non-display area through the display area to the opposing side edge. This transforms a two-dimensional layout problem into a three-dimensional spatial solution, allowing connection lines to traverse through the display area depth rather than expanding the non-display area perimeter.
Solution Approach 2:
The patent segments the connection path into multiple sections: first connection lines in the non-display area, second connection lines traversing the display area, and third connection lines exiting to the opposing side. This segmentation allows each section to be optimized independently for its specific functional requirements.
2Area of stationary object
If connection lines are arranged in the display area to minimize non-display area, then the non-display area is reduced, but display quality may degrade due to pattern visibility
Solution Approach 1:
The patent applies local quality by introducing dummy connection lines specifically in regions where pattern visibility might occur, while maintaining the functional connection lines only where needed for electrical connectivity. This localized addition of dummy elements prevents Moire patterns without affecting the overall display quality or adding unnecessary complexity to functional regions.
Solution Approach 2:
The patent creates dummy connection lines that replicate the appearance and routing of functional connection lines. These dummy lines are electrical disconnects that visually match the functional lines, creating a uniform pattern that prevents Moire interference while maintaining the aesthetic and structural consistency of the display.
3Area of stationary object
If multiple layers of connection lines are used to route signals through the display area, then the non-display area is minimized, but the device complexity increases
Solution Approach 1:
The patent applies universality by using the same connection line structure and routing methodology for both functional connection lines and dummy connection lines. This unified approach allows the same design patterns, manufacturing processes, and quality control procedures to be applied throughout, reducing the effective complexity despite the multi-layer routing.
Data Source
AI summary
A display device, includes: a display area and a non-display area; a plurality of signal lines over the display area; and a plurality of connection lines in the display area and connected to the signal lines, wherein the plurality of connection lines includes a plurality of first connection lines connected to the signal lines, respectively, a plurality of third connection lines on a same layer as the first connection lines, and a plurality of second connection lines connecting the first connection lines to the third connection lines.