Display Panel Fan-Out Routing for Narrow Lower Frame
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Solution Overview
Problem
Conventional display panels face challenges in achieving a narrow frame design due to the electrical connection of fan-out traces with output terminals through a side of the drive chip close to the display area, which limits the reduction of the bottom bezel.
Innovation Solution
The display panel design includes a substrate with a display area and a non-display area, featuring a drive chip with input and output terminals, where second output terminals are positioned away from the display area, and fan-out traces are connected through adjacent sides, allowing for compression of first fan-out traces and reduction in the fan-out area width, enabling the drive chip to be moved upward and minimizing the lower frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If fan-out traces are connected with output terminals through the first side close to the display area, then electrical connection is achieved, but the fan-out area width cannot be compressed further, preventing narrow frame realization
Solution Approach 1:
The output terminals are segmented into two groups: first output terminals connected through the first side close to the display area, and second output terminals connected through the second side away from the display area. This segmentation allows different trace routing paths, enabling compression of the fan-out area width while maintaining all electrical connections.
Solution Approach 2:
The connection path is changed from a single-dimension approach (all traces through one side) to a two-dimension approach (traces through first side and second side). By utilizing the second side away from the display area for second output terminals, the fan-out area can be compressed in the horizontal direction while traces route through the vertical dimension via the second side.
2Length of moving object
If all output terminals are arranged along the first side close to the display area, then connection to display area is simplified, but the drive chip cannot be moved upward to reduce lower frame
Solution Approach 1:
Output terminals are divided into first output terminals arranged along the first side and second output terminals arranged along the second side. This segmentation enables the drive chip to be positioned higher on the substrate, reducing the lower frame height, while maintaining organized connection paths for both terminal groups.
Solution Approach 2:
Instead of having all output terminals connected through the side close to the display area (first side), the invention inverts the connection approach for second output terminals by connecting them through the second side away from the display area. This inversion enables upward movement of the drive chip and reduction of the lower frame.
3Area of stationary object
If second output terminals are disposed between first output terminals and input terminals, then fan-out area is compressed, but trace routing complexity increases
Solution Approach 1:
The trace routing is segmented into first fan-out traces connecting first output terminals through the first side, and second fan-out traces connecting second output terminals through the second side. This segmentation, combined with sequential connection of adjacent second output terminals, compresses the fan-out area while organizing trace routing into manageable groups.
Solution Approach 2:
Adjacent second output terminals are pre-arranged in a sequential order that matches the sequential connection requirement of second fan-out traces. This preliminary arrangement of terminals simplifies the trace routing process, as traces can directly connect to terminals in sequence without complex crossing or reconfiguration.
Data Source
AI summary
A display panel is provided. In the display panel, a plurality of first output terminals are arranged along an extending direction of a first side of a drive chip, a plurality of second output terminals are disposed on a side of the first output terminals away from a display area, and the plurality of second output terminals are disposed in an area between the plurality of first output terminals and an input terminal. Each second fan-out trace is electrically connected with a corresponding second output terminal through a second side of an adjacent drive chip, so that the drive chip can be moved upward as a whole and a lower frame can be reduced. A display device is also provided.