Display Panel Bezel Width Reduction via 3D Signal Routing
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Solution Overview
Problem
Current display panel designs face challenges in narrowing the bezel width due to the arrangement of signal lines and power supply lines, which limits the achievement of an extremely narrow bezel or no-bezel design, especially in flexible display technologies like OLEDs.
Innovation Solution
The display panel incorporates a unique arrangement where data signal lines, high-voltage power supply lines, and low-voltage power supply lines are extended from the display region to the fan-out region, with specific layering and positioning to reduce bezel width, allowing the fan-out region to be placed on the backside after bending, thereby minimizing the lower bezel width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If signal lines and power supply lines are arranged in conventional positions, then electrical connection and signal transmission are ensured, but the bezel width cannot be narrowed sufficiently
Solution Approach 1:
The patent extends signal lines and power supply lines from the conventional side-by-side arrangement in the same plane to a three-dimensional configuration where lines are routed through different layers and bent regions. Data signal lines extend to the bending region and connect to fan-out lines in the fan-out region, while power supply lines are divided into high-voltage and low-voltage lines that extend to different regions, utilizing vertical stacking and lateral routing to achieve compact bezel design without compromising electrical connection reliability
Solution Approach 2:
The patent segments the power supply system into separate high-voltage power supply lines and low-voltage power supply lines, with each type extending to different regions (fan-out region vs. display region). This segmentation allows independent optimization of each line's routing path, enabling the high-voltage lines to extend to the fan-out region while low-voltage lines serve the display region, thereby narrowing the bezel width while maintaining reliable electrical connections for both power types
2Ease of operation
If the fan-out region is positioned in the lower bezel area, then connection to external circuits is facilitated, but the lower bezel width increases
Solution Approach 1:
The patent implements a nested configuration where the fan-out region containing data fan-out lines is positioned within or adjacent to the bending region. The data signal lines extend from the display region through the bending region to connect with the fan-out lines, creating a compact nested arrangement that integrates multiple functional regions (display region, bending region, fan-out region) in a space-efficient manner, facilitating external circuit connection while minimizing lower bezel width
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by extending data signal lines vertically and laterally through multiple layers to reach the bending region and fan-out region. This multi-dimensional routing allows the fan-out region to be positioned compactly without requiring excessive lower bezel width, as connections are achieved through vertical stacking and diagonal routing rather than simple lateral extension
3Reliability
If multiple signal lines and power supply lines are extended to the fan-out region, then electrical connectivity is improved, but signal interference increases
Solution Approach 1:
The patent segments power supply lines into distinct high-voltage and low-voltage categories with separate routing paths. High-voltage power supply lines extend to the fan-out region while low-voltage power supply lines extend to the display region, preventing high-voltage interference with low-voltage signal lines. This segmentation also applies to signal lines, which are routed separately from power lines through different regions and layers, reducing electromagnetic interference while maintaining comprehensive electrical connectivity
Solution Approach 2:
The bending region serves as an intermediary zone that separates and isolates different types of signal lines and power supply lines. By routing data signal lines through the bending region to connect with fan-out lines, while keeping power supply lines in different regions, the bending region acts as a spatial buffer that reduces mutual interference between high-voltage power lines and low-voltage signal lines, maintaining electrical connectivity while minimizing signal interference
Data Source
AI summary
A display panel and a display apparatus. The display panel comprises a display region and a peripheral region located on one side of the display region. The peripheral region comprises a bent region and a fanout region, the fanout region being located on the side of the bent region away from the display region. The display panel comprises: a substrate and, arranged on the substrate, circuit units arranged in an array, a plurality of data signal lines extending in a first direction, and a plurality of data fanout lines located in the fanout region, said data signal lines at least extending to the bent region from the display region, and said data signal lines being respectively electrically connected to the circuit units and the data fanout lines.