Display Substrate Electrode Overlap Layout for OLED Signal Routing
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Solution Overview
Problem
Existing display technologies using OLEDs with TFTs for signal control face challenges in optimizing the layout and connectivity of electrodes and signal lines, which can affect the efficiency and performance of the display panel.
Innovation Solution
A display substrate design that includes a base substrate with a second power line, data signal line, and sub-pixels, featuring a pixel driving circuit connected to a light emitting device, with specific arrangements of conducting layers and electrodes to enhance connectivity and overlap areas for improved signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first electrode is arranged to overlap with the data signal line, then signal transmission efficiency is improved, but the layout complexity increases
Solution Approach 1:
The first electrode is arranged in a different layer (first, second, or third conducting layer) while the data signal line is in the fourth conducting layer, creating vertical overlap in the third dimension. This allows signal transmission enhancement through capacitive coupling without requiring horizontal layout complexity in the same plane.
2Adaptability or versatility
If multiple conducting layers are used to arrange electrodes and signal lines, then connectivity is enhanced, but manufacturing complexity increases
Solution Approach 1:
The conducting layers are segmented into five distinct layers (first through fourth conducting layers), with each layer serving specific functions. This segmentation allows independent optimization of electrode arrangements and signal line routing in different layers, enhancing connectivity while maintaining manageable manufacturing through systematic layer-by-layer fabrication.
3Reliability
If the first electrode is connected to the second power line through multiple via holes, then connection reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The connection between the first electrode and second power line is achieved through vertical via holes penetrating through insulating layers between different conducting layers. This vertical connection in the third dimension provides reliable electrical connection while distributing the precision requirements across multiple standardized via hole fabrication steps rather than requiring single-step high-precision alignment.
Data Source
AI summary
A display substrate and a manufacturing method therefor, and a display apparatus. The display substrate includes a base substrate, a second power line, a data signal line and a plurality of sub-pixels, wherein at least one sub-pixel includes a pixel driving circuit and a light emitting device connected to the pixel driving circuit; a semiconductor layer and a plurality of conducting layers, which are disposed at one side of the semiconductor layer away from the base substrate, are disposed on the base substrate, a first electrode is arranged in at least one conducting layer, the first electrode is connected to the second power line, and there is an overlapping area between an orthographic projection of the first electrode on the base substrate and an orthographic projection of the data signal line on the base substrate.