Display Substrate Drive Structure for Narrow Bezel Design
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Solution Overview
Problem
Existing display technologies face challenges in achieving a narrow bezel and high screen-to-body ratio due to the oblique fanout lines in the bonding region, which occupy a large space and hinder bezel narrowing.
Innovation Solution
The display substrate incorporates a drive structure layer with a specific arrangement of data signal lines, connection lines, and power supply traces, which allows for a reduced length of the lead region and a narrower lower bezel, thereby increasing the screen-to-body ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If oblique fanout lines are used in the bonding region to connect data signal lines, then the connection between bonding region and display region is achieved, but the fanout lines occupy a large space which hinders bezel narrowing
Solution Approach 1:
The patent transforms the traditional oblique fanout line layout into a grid-like arrangement where connection lines extend primarily in the first direction (horizontal) rather than diagonally. This dimensional reorganization allows data signal lines to connect to lead-out lines through a more space-efficient path, reducing the area occupied in the bonding region while maintaining connection functionality.
Solution Approach 2:
The connection path is segmented into distinct components: data signal lines extending in the second direction (vertical), connection lines extending in the first direction (horizontal) to bridge between data signal lines and lead-out lines, and lead-out lines extending in the second direction. This segmentation allows each component to be optimized independently for space efficiency.
2Reliability
If traditional lead region layout is used, then signal transmission is achieved, but the lead region length is large which reduces screen-to-body ratio
Solution Approach 1:
The patent changes the geometric parameters of the lead region by repositioning the starting points of data signal lines closer to the display region boundary and optimizing the extension directions of connection lines. This parameter optimization shortens the overall lead region length while maintaining signal transmission integrity through proper layer stacking and connection design.
3Ease of manufacture
If more space is allocated to connection lines and data signal lines, then signal routing is simplified, but the screen-to-body ratio decreases
Solution Approach 1:
The patent employs an asymmetric layout strategy where connection lines and data signal lines are positioned and oriented differently to optimize space utilization. Specifically, connection lines extend horizontally from data signal lines that extend vertically, creating an L-shaped connection pattern that minimizes the bounding box area while ensuring proper signal routing and electrical connections.
Data Source
AI summary
Disclosed are a display substrate and a preparation method therefor, and a display apparatus. The display substrate includes a plurality of circuit units, a plurality of data signal lines extending along a second direction, a plurality of first connection lines, and a plurality of second connection lines; a circuit unit includes a pixel drive circuit, at least one data signal line is connected with a plurality of pixel drive circuits of a unit column, first ends of the plurality of first connection lines are correspondingly connected with the plurality of data signal lines, and second ends of the plurality of first connection lines are correspondingly connected with the plurality of second connection lines; pixel drive circuits in adjacent unit columns are mirror symmetrical with respect to a center line, and a second connection line is disposed at a gap between pixel drive circuits in adjacent unit columns.