Array Substrate Signal Routing for Narrow-Bezel GOA Panels
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Solution Overview
Problem
The existing Gate Driver on Array (GOA) design for display panels increases the frame width, reducing the visual experience due to the need for scan driving signals to be input from both sides, which complicates the arrangement and increases the panel's frame width.
Innovation Solution
The design incorporates a signal transmission line that allows scan driving signals to be input from one side, with a shielding line and data lines arranged to reduce frame width and improve visual experience by enabling the GOA module to be placed on one side, alongside the data driving module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If scan driving signals are input from both sides of the display panel, then the influence of resistance voltage drop is reduced, but the frame width is greatly increased and visual experience is reduced
Solution Approach 1:
The patent introduces a signal transmission line in a different layer (second metal layer) that extends along the data line direction, creating a new dimensional path for signal distribution. This allows scan driving signals to be transmitted from one side through the array substrate to scan lines on the opposite side, eliminating the need for GOA modules at both edges and reducing frame width while maintaining reliable signal distribution.
Solution Approach 2:
The signal transmission line serves multiple functions: it transmits scan driving signals generated by a single GOA module to scan lines across the entire display panel, replacing the need for separate GOA modules at both edges. This multi-functional design consolidates the driving architecture and reduces frame width.
2Ease of operation
If GOA modules are arranged at both sides of the display panel, then scan driving can be achieved, but the width of the frame is greatly increased
Solution Approach 1:
The patent extracts the signal transmission function from the edge GOA modules and relocates it to an internal signal transmission line within the array substrate. By taking out the need for dual-edge GOA modules and implementing signal transmission through the substrate's internal wiring, the frame width is significantly reduced while scan driving capability is maintained.
Solution Approach 2:
The signal transmission line acts as an intermediary that carries scan driving signals from the single GOA module through the array substrate to reach scan lines on the opposite side. This intermediary structure enables long-distance signal transmission without requiring additional GOA modules at the edges.
3Length of stationary object
If a signal transmission line is added to transmit scan driving signals from one side, then frame width is reduced, but the wiring complexity increases
Solution Approach 1:
The patent merges the signal transmission line with the existing data line wiring structure, placing both lines in the same second metal layer. This consolidation utilizes the existing wiring infrastructure and fabrication processes, reducing the overall wiring complexity despite adding the signal transmission function.
Solution Approach 2:
The patent resolves wiring complexity by transitioning to a different layer (second metal layer) for the signal transmission line, allowing it to extend along the data line direction without interfering with the scan line wiring in the first metal layer. This dimensional separation simplifies the overall wiring architecture.
Data Source
AI summary
Embodiments of the present invention disclose an array substrate and a display panel. The array substrate includes a first substrate, and a first metal layer, a second metal layer, and a first shielding line sequentially disposed on the first substrate. The first metal layer includes a plurality of scan lines, the second metal layer includes a signal transmission line electrically connected to all of the scan lines, and at least a part of an orthographic projection of a wiring part of the signal transmission line on the first substrate coincides with an orthographic projection of the first shielding line on the first substrate.