Display Substrate Vertical Connection Lines Reduce Signal Noise
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Solution Overview
Problem
Liquid crystal display (LCD) apparatuses face signal noise due to line resistance and interference between adjacent signal lines, which degrades signal integrity and display quality.
Innovation Solution
A display substrate with signal lines configured as vertical connection lines, featuring a first pad part connected to a driver circuit, a second pad part connected to a flexible circuit film, and a connection line part between them, optimized to reduce noise by adjusting the number of pads based on signal current and configuring connection lines with low resistance and uniform resistance for improved signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal lines are configured to transfer signals between driver circuit and flexible circuit film, then electrical connection is achieved, but noise occurs due to line resistance and interference between adjacent signal lines
Solution Approach 1:
The signal lines are divided into multiple segments with different configurations. Specifically, first signal lines connect first pad parts to second pad parts, while second signal lines connect first pad parts to third pad parts. This segmentation allows different signal paths to be optimized independently, reducing interference and noise while maintaining reliable electrical connection.
Solution Approach 2:
Different regions of the peripheral area are assigned different functions and signal line configurations. The first peripheral area contains first pad parts connected to driver circuits, the second peripheral area contains second pad parts connected to flexible circuit films, and the third peripheral area contains third pad parts. This local differentiation optimizes signal transmission quality in each region while minimizing overall noise.
2Adaptability or versatility
If multiple signal lines are arranged in peripheral area to connect various components, then electrical connectivity is improved, but interference between adjacent signal lines increases
Solution Approach 1:
Signal lines are segmented into different groups serving different functions: first signal lines for driver circuit connections, second signal lines for flexible circuit film connections, and third signal lines for additional pad part connections. This segmentation reduces interference by separating signal paths while maintaining comprehensive electrical connectivity across all components.
3Loss of time
If connection lines are configured as vertical line type between pad parts, then signal delay is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The vertical line type configuration creates more uniform electrical potential distribution across the pad parts, reducing signal delay by minimizing resistance variations. The vertical orientation ensures consistent current flow paths between corresponding pad parts, achieving equipotential conditions that reduce time loss while the regular geometric pattern facilitates manufacturing alignment.
Data Source
AI summary
A display substrate includes a pixel electrode disposed in a display area, a first pad part disposed in a first area of a peripheral area which is disposed adjacent to the display area, where the first pad part is electrically connected to a driver circuit, a second pad part disposed in a second area of the peripheral area facing the first pad part, where the second pad part is electrically connected to a flexible circuit film which transfers a transmission signal to the driver circuit, and a connection line part disposed in an area between the first and second pad parts as a vertical line type, where the connection line part connects the first and second pad parts to each other.