Multi-Layer Display Interconnect Layout for Narrow Bezel Panels
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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, using conductive layers and contact holes to reduce overlap and dead space, and includes a flexible substrate for bending and rolling capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If driving circuits are arranged in a non-display area adjacent to the display area, then the display device can provide necessary driving functions, but the non-display area increases reducing the effective display area
Solution Approach 1:
The patent transitions connection lines from a planar two-dimensional layout to a three-dimensional multi-layer structure. Connection lines are arranged on different layers (first connection lines on one layer, second connection lines on another layer) and connected via contact holes, enabling spatial optimization that reduces the non-display area while maintaining driving circuit functionality.
2Area of stationary object
If multiple layers of connection lines are used to minimize non-display area, then the effective display area increases, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The patent segments the connection line structure into distinct functional components: first connection lines for initial signal routing, second connection lines for additional routing on a different layer, and contact holes for inter-layer connections. This segmentation allows each component to be optimized independently while collectively achieving compact integration and reduced non-display area.
3Area of stationary object
If connection lines are optimized to reduce non-display area, then display area increases, but visual recognition of patterns may degrade
Solution Approach 1:
By moving additional connection routing to a third dimension (multiple layers), the patent achieves compact signal routing without creating visible patterns on the display surface. The multi-layer structure allows connection lines to be positioned beneath the display area or routed in a manner that minimizes visual impact, thus maintaining display quality while reducing the non-display area.
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.