Display Panel Connection Lines in Display Area
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Solution Overview
Problem
Conventional display panels have a significant non-display area due to the presence of connection lines, which limits the reduction of bezel width, especially in high-resolution displays.
Innovation Solution
The display panel design places connection lines within the display area, utilizing vias to connect signal lines, and forms an insulation layer with vias in both the display and bonding areas to minimize the non-display area, potentially achieving zero bezel width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If connection lines are disposed in the non-display area, then the display panel structure is simple and easy to manufacture, but the non-display area width increases resulting in noticeable bezel
Solution Approach 1:
The connection lines are moved from the traditional non-display area (horizontal arrangement) to the display area arranged vertically along the periphery. This dimensional repositioning allows connection lines to occupy vertical space rather than horizontal space, enabling the non-display area width to be reduced while still accommodating all necessary connection lines.
2Length of stationary object
If connection lines are moved into the display area, then the non-display area width is reduced, but the layout complexity increases due to via connections
Solution Approach 1:
The connection lines are segmented and arranged in different vertical positions along the periphery of the display area. First connection lines are arranged in a first vertical direction, while second connection lines are arranged in a second vertical direction different from the first. This segmentation allows systematic organization of multiple connection lines without creating complex overlapping routes.
Solution Approach 2:
Vias are introduced as intermediary structures to connect the connection lines with the signal lines. The vias penetrate the insulating layer to establish electrical connections, serving as mediators that simplify the overall layout by providing direct vertical connection points rather than requiring complex lateral routing.
3Manufacturing precision
If multiple connection lines are accommodated in high-resolution displays, then display resolution is improved, but the non-display area width increases significantly
Solution Approach 1:
The connection lines for different signal types (data lines, gate lines, voltage transmission lines) are merged into a unified vertical arrangement along the periphery of the display area. Instead of requiring separate horizontal bonding areas for each signal type, all connection lines share the same vertical pathway, significantly reducing the total non-display area required regardless of the number of connection lines needed for high-resolution displays.
Data Source
AI summary
A display panel includes a substrate, a thin film transistor (TFT) layer on the substrate, and multiple connection lines disposed between the substrate and the TFT layer. The TFT layer includes TFTs and signal lines connected to the TFTs for providing signals to the TFTs. Each connection line is electrically connected to a signal line. The present invention also teaches a display panel manufacturing method. The present invention has the connection lines formed in the display area, instead of in the non-display area, thereby reducing the width of the non-display area.