OLED Anode Layout Avoiding Gate Line Overlap
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Solution Overview
Problem
OLED display panels face issues with undesired light emission between light-emitting elements of different colors due to varying threshold voltages, leading to increased power consumption and adverse display effects.
Innovation Solution
The display panel design includes a base substrate with gate and data lines intersecting to form pixel circuits, where the anode of the light-emitting element does not overlap with gate lines and/or light-emitting control signal lines, reducing parasitic coupling capacitance and preventing unwanted light emission by maintaining a specific distance between the anode and these lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the anode overlaps with gate lines and/or light-emitting control signal lines to simplify structure and improve manufacturing, then device complexity is reduced, but parasitic coupling capacitance increases causing undesired light emission and increased power consumption
Solution Approach 1:
The patent extracts the problematic overlapping region by separating the anode from the gate lines and light-emitting control signal lines. This is achieved by adjusting the layout so that the anode does not overlap with these signal lines, thereby removing the source of parasitic coupling capacitance while maintaining the overall device structure
Solution Approach 2:
The patent resolves the overlap issue by changing the spatial arrangement in the planar dimension. By carefully designing the relative positions and extensions of the anode, gate lines, and light-emitting control signal lines in the XY plane, the patent eliminates overlapping areas without requiring additional vertical layers or complex three-dimensional structures
2Ease of manufacture
If the anode overlaps with gate lines and/or light-emitting control signal lines to simplify structure, then ease of manufacture is improved, but undesired light emission occurs affecting display quality
Solution Approach 1:
The patent removes the harmful overlapping interaction between the anode and signal lines by redistributing their positions in the planar layout. This extraction of the problematic configuration maintains manufacturing simplicity as it only requires adjusted patterning without adding complex manufacturing steps
Solution Approach 2:
The patent applies local quality by making the spatial relationship between components non-uniform. Specifically, the anode is positioned with controlled spacing relative to gate lines and light-emitting control signal lines in specific regions to prevent overlap, while other regions maintain their standard configurations
3Device complexity
If the anode overlaps with gate lines and/or light-emitting control signal lines to simplify structure, then device complexity is reduced, but current carriers move laterally causing remaining light-emitting elements to emit light undesirably
Solution Approach 1:
The patent extracts the lateral current carrier movement path by removing the overlapping configuration that enables such movement. By separating the anode from the signal lines, the patent eliminates the parasitic capacitance that would otherwise allow current carriers to leak into adjacent light-emitting elements
Solution Approach 2:
The patent converts the potential harm of close spacing between components into a benefit by carefully designing the minimal necessary spacing. This optimized spacing prevents lateral current carrier movement while maintaining compact device dimensions and simple structure
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a base substrate; a plurality of gate lines extending in a row direction and a plurality of data lines extending in a column direction arranged on the base substrate, and the plurality of gate lines and the plurality of data lines intersect in an insulation manner to define a plurality of pixel circuit regions including a plurality of pixel circuits; a plurality of sub-pixel regions arranged on the base substrate, and each of the plurality of sub-pixel regions includes a light-emitting element, a corresponding one of the plurality of pixel circuits provides a driving signal to the light-emitting element, and the light-emitting element includes an anode, a light-emitting layer and a cathode which are sequentially stacked at a side of the base substrate; and a plurality of light-emitting control signal lines arranged on the base substrate.