Display Panel Fan-Out Routing for Narrow Lower Bezels
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Solution Overview
Problem
Conventional display panels have wide lower bezels due to the layout of fan-out lines in the non-display area, which occupy significant space and prevent the achievement of narrow bezel designs despite minimizing line spacing.
Innovation Solution
The use of a second metal layer for wiring the fan-out lines, with transmission lines arranged more densely than data lines, allowing fan-out lines to be placed in the display area, reducing the overall width of the bezel without additional film layers or processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fan-out lines are arranged in the non-display area to connect data lines, then data signal transmission is achieved, but the lower bezel width increases
Solution Approach 1:
The patent transitions the fan-out line arrangement from the non-display area (horizontal dimension) to the display area (vertical dimension). By routing fan-out lines through the display area along the vertical direction and utilizing the second metal layer, the design changes the spatial dimension of signal transmission, thereby reducing the horizontal bezel width while maintaining data signal transmission functionality.
Solution Approach 2:
The patent segments the wiring layers into first metal layer (for data lines) and second metal layer (for fan-out lines). This segmentation allows fan-out lines to be routed separately through the display area without interfering with data line arrangements, enabling compact bezel design while maintaining proper signal transmission paths.
2Length of stationary object
If line spacing is minimized to reduce bezel width, then narrow bezel design is achieved, but manufacturing precision requirements increase
Solution Approach 1:
By routing fan-out lines vertically through the display area rather than horizontally in the non-display area, the patent eliminates the need for extremely tight horizontal spacing in the bezel region. The vertical arrangement naturally provides greater spacing tolerance, reducing manufacturing precision requirements while achieving narrow bezel width.
Solution Approach 2:
The second metal layer acts as an intermediary wiring layer that facilitates fan-out line transmission through the display area. This intermediate layer provides a dedicated pathway that avoids direct conflicts with data lines, allowing for more relaxed spacing requirements and reduced manufacturing complexity.
3Length of stationary object
If fan-out lines are arranged with small spacing to reduce bezel width, then narrow bezel design is achieved, but signal resistance increases
Solution Approach 1:
The vertical arrangement of fan-out lines through the display area provides longer transmission paths with more favorable geometry for signal integrity. This dimensional change allows for optimized line routing that reduces signal resistance while maintaining compact bezel width, as the vertical paths can be designed to minimize resistance without requiring extremely tight spacing.
Solution Approach 2:
The second metal layer serves as an intermediary that provides optimal routing paths for fan-out lines. By utilizing this dedicated layer, the design can optimize line spacing and routing to minimize signal resistance while achieving narrow bezel width, as the second metal layer provides a controlled environment for signal transmission.
Data Source
AI summary
The present application provides a display panel and a display terminal. The display panel includes a first metal layer and a second metal layer. The first metal layer includes data lines arranged in a display area and extending along a first direction. The second metal layer includes first transmission lines in the display area. Each of the first transmission lines is electrically connected to at least one data line. At least a portion of each of the first transmission lines extends along the first direction.