Display Substrate Multi-Layer Signal Line Voltage Drop
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Solution Overview
Problem
Existing display substrates face challenges in achieving high-brightness display modes due to significant voltage drops in signal line film layers, leading to poor display uniformity.
Innovation Solution
A display substrate is designed with a signal line film layer comprising a stacked structure of a first conductive layer, a conductive connection layer, and a second conductive layer, which reduces voltage drop and enhances heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single-layer signal line film is used, then the device complexity is low, but the voltage drop is significant and display uniformity is poor
Solution Approach 1:
The signal line film is segmented into multiple conductive layers (first conductive layer, second conductive layer, third conductive layer) with different orientations. Each layer is patterned with conductive lines extending in specific directions, creating a distributed network that collectively reduces voltage drop across the display substrate.
Solution Approach 2:
The invention transitions from a single-layer two-dimensional signal line to a multi-layer three-dimensional conductive network. The conductive layers are stacked at different heights with orthogonal or angled orientations, creating a spatial network that provides multiple current paths and reduces effective resistance.
2Reliability
If the conductive layers are arranged orthogonally, then the voltage drop is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The conductive layers are designed to create equipotential regions by extending conductive lines in orthogonal directions. The first conductive layer extends in a first direction, the second conductive layer extends in a second direction intersecting the first, and the third conductive layer extends in a third direction intersecting both, creating a network that equilibrates potential distribution across the substrate.
Solution Approach 2:
The invention changes the geometric parameters of the conductive network by varying the extension directions and orientations of conductive lines in different layers. By adjusting the angles and directions of conductive line extensions, the network optimizes current distribution and reduces voltage drop while maintaining manufacturability.
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
The multi-layer network stacked structure of the signal line film layer effectively reduces voltage drop and ensures display uniformity in high-brightness modes, while also facilitating heat dissipation.
Implementation Method 1
the signal line film layer includes: a first conductive layer and a second conductive layer that are stacked; and, a conductive connection layer, wherein the conductive connection layer is arranged at a different layer from each of the first conductive layer and the second conductive layer
Implementation Method 2
the multi-layer network stacked structure of the signal line film layer effectively reduces voltage drop and ensures display uniformity in high-brightness modes, while also facilitating heat dissipation
Data Source
AI summary
The present disclosure provides a display substrate and a display device. The display substrate includes a base substrate and a signal line film layer arranged on the base substrate; the signal line film layer includes: a first conductive layer, a second conductive layer and a conductive connection layer, the conductive connection layer is arranged at a different layer from each of the first conductive layer and the second conductive layer, and an orthographic projection of the conductive connection layer on the base substrate at least partially overlaps an orthographic projection of the first conductive layer on the base substrate, and the orthographic projection of the conductive connection layer on the base substrate at least partially overlaps an orthographic projection of the second conductive layer on the base substrate, the conductive connection layer is respectively coupled to the first conductive layer and the second conductive connection layer.