Display Substrate Connection-Line Layout for Larger Active Regions
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Solution Overview
Problem
Existing display technologies face challenges in maximizing the size of the active display region while efficiently arranging connection lines without causing display mura issues due to uneven line lengths and resistance changes at junctions.
Innovation Solution
The display substrate incorporates a design with connection lines having different extension directions, including first-type and second-type connection lines in multiple layers, utilizing trace space effectively and reducing resistance changes, with switching holes strategically arranged to optimize line arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If connection lines are arranged to extend from the first region to the second region, then the active display region size is increased, but the line lengths become uneven causing display mura
Solution Approach 1:
The connection line is divided into multiple segments (first connection segment, second connection segment, third connection segment) with different extension directions. Each segment connects to different regions or features, allowing the overall path to reach from the first region to the second region while keeping individual segment lengths more uniform, thus reducing display mura.
Solution Approach 2:
The connection line changes its extension direction multiple times by forming corners (first corner and second corner) with different turning directions. This multi-directional approach allows the line to navigate through the layout more efficiently, extending the active display region while managing line length variations through spatial reconfiguration.
2Productivity
If connection lines are arranged in multiple layers with different extension directions, then trace space utilization is improved, but the structure becomes more complex
Solution Approach 1:
The patent introduces multiple connection layers (first connection layer, second connection layer) with connection lines having different extension directions. This vertical and horizontal dimensional expansion allows more connection lines to be accommodated within the same footprint, improving trace space utilization. The multi-layer structure with varied extension directions enables efficient space usage while managing complexity through systematic organization.
Solution Approach 2:
Different connection lines have different extension directions and corner configurations (e.g., first-type connection lines with clockwise corners, second-type connection lines with counter-clockwise corners). This asymmetric design allows flexible adaptation to various layout requirements, optimizing trace space utilization by directing connection lines along the most space-efficient paths in each layer.
Data Source
AI summary
A display substrate, comprising: a substrate, a plurality of first pixel circuits (11), a plurality of first light-emitting elements (21), and a plurality of connection lines (L). The plurality of connection lines (L) at least comprise: a plurality of first connection lines (31) located on a first connection layer. The plurality of first connection lines (31) comprise: at least one first-type first connection line (31a). The first-type first connection line (31a) comprises: successively connected, a first connection section (311), a second connection section (312), and a third connection section (313). The extension directions of the first connection section (311), the second connection section (312) and the third connection section (313) are different from each other.