Electroluminescent Display Panel With Parallel Signal-Line Electrodes
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Solution Overview
Problem
Organic light-emitting diode (OLED) display panels face challenges in achieving high Pixels Per Inch (PPI) due to signal line resistivity issues, leading to signal delay and degraded display quality, especially in larger VR or AR applications.
Innovation Solution
Incorporating a resistance reducing electrode at a different layer and in parallel with signal lines, such as transverse direct-current high-level signal lines, to reduce signal line resistance and improve display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If transverse direct-current high-level signal lines are routed at the same layer as gate lines to compress pixel driving circuit space, then device integration is improved, but signal line resistivity increases causing signal delay
Solution Approach 1:
The patent introduces a resistance reducing electrode at a different layer (second layer) from the signal line (first layer), creating a three-dimensional electrical connection structure. This dimensional separation allows the signal line to maintain its transverse routing for space compression while the resistance reducing electrode provides parallel current paths through via connections, effectively reducing signal line resistance without increasing planar complexity.
2Ease of manufacture
If molybdenum metal is used for transverse direct-current high-level signal lines, then manufacturing process is simplified, but resistivity is far higher than aluminum metal causing increased signal load
Solution Approach 1:
The patent creates a composite electrical conduction system by combining the transverse signal line (first layer) with the resistance reducing electrode (second layer) through via connections. This composite structure leverages the manufacturing advantages of molybdenum signal lines while compensating for their high resistivity by adding parallel conduction paths from the resistance reducing electrode, effectively creating a hybrid conduction system.
3Reliability
If signal line resistance is reduced to improve display quality, then display uniformity is improved, but additional electrode structures increase device complexity
Solution Approach 1:
The resistance reducing electrode serves multiple functions: it reduces signal line resistance by providing parallel current paths, acts as an electrical connection element through via connections to different layers, and can be integrated with existing pixel electrode structures. This multi-functionality allows the additional electrode to address signal transmission issues without proportionally increasing overall device complexity.
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 resistance reducing electrode effectively lowers signal load, enhancing display quality and uniformity by reducing resistances in signal lines, particularly in larger OLED display panels.
Implementation Method 1
completely fill the gap between pixels
Implementation Method 2
organic light-emitting layer
Data Source
Figure 1~2
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AI summary
Provided are an electroluminescent display panel, a manufacturing method therefor and a display device, said electroluminescent display panel comprising: a base substrate, a plurality of pixel units provided on the base substrate, a driving circuit electrically connected to the pixel units, and a plurality of signal lines electrically connected to the driving circuit; moreover, the electroluminescent display panel also comprises: resistance reducing electrodes (301) provided at a layer different from that of at least one signal line, and in parallel connection with same. As the resistance of the signal lines can be reduced when the resistance reducing electrodes (301) are in parallel connection with the signal lines, the signal load of the signal lines is reduced, and the display quality of the electroluminescent display panel is improved.