Display Panel Cross-Layer Signal Layout to Reduce Voltage Drop
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Solution Overview
Problem
The large sheet resistance of the gate layer in display panels leads to significant voltage drops during signal transmission, affecting the uniformity and efficiency of initial signals in pixel-driving circuits.
Innovation Solution
The display panel design includes a second conductive layer in the gate layer and a third conductive layer in the source-drain layer, with initial signal lines in these layers extending in intersecting directions to provide signals to pixel-driving circuits, reducing voltage drops and improving signal transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If initial signal lines are located in the gate layer, then the structure is simple, but the voltage drop is large due to large sheet resistance
Solution Approach 1:
The patent divides the signal transmission path into two segments: first initial signal lines in the gate layer and second initial signal lines in the source-drain layer. This segmentation allows the signal to be transmitted through multiple paths with different resistance characteristics, reducing the overall voltage drop while maintaining structural organization.
Solution Approach 2:
The patent introduces intermediate conductive layers (second conductive layer in gate layer, third conductive layer in source-drain layer) as mediators between the signal source and pixel-driving circuits. These intermediate layers provide alternative low-resistance pathways for signal transmission, reducing voltage drop without complicating the overall structure.
2Device complexity
If initial signal lines are located in the gate layer, then the layout is simple, but the signal transmission efficiency is low due to large voltage drop
Solution Approach 1:
The patent transitions from a single-layer (2D) signal transmission approach to a multi-layer (3D) approach by placing initial signal lines in both the gate layer and source-drain layer. This dimensional change provides additional transmission pathways, improving signal transmission efficiency while maintaining layout organization through structured layer placement.
Solution Approach 2:
The patent applies different conductive layer qualities to different regions of the display panel. The gate layer provides one set of initial signal lines while the source-drain layer provides another set with different resistance characteristics. This local differentiation optimizes signal transmission efficiency in different areas without requiring complete redesign of the entire layout.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively reduces voltage drops in initial signal transmission, enhancing display uniformity and performance by utilizing conductive layers with different sheet resistances to optimize signal delivery to pixel-driving circuits.
Implementation Method 1
the second conductive layer includes first initial signal lines, and the first initial signal lines are configured to provide first initial signals to the pixel-driving circuits; and the third conductive layer includes second initial signal lines, and the second initial signal lines are configured to provide second initial signals to the pixel-driving circuits
Data Source
AI summary
A display panel and a display device are provided. The display panel includes pixel-driving circuits, a base substrate; a second conductive layer including first initial signal lines to provide first initial signals; and a third conductive layer including second initial signal lines to provide second initial signals, the second conductive layer is located in a second gate layer, and the third conductive layer is located in a source-drain layer, the first initial signal line extends along a first direction; the second initial signal line extends along a second direction intersecting with the first direction; the first initial signal line is configured to provide the first initial signal to the pixel-driving circuits distributed along the first direction; and the second initial signal line is configured to provide the second initial signal to the pixel-driving circuits distributed along the second direction.