Display Substrate Pixel Electrode Routing for Density and Light Transmittance
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Solution Overview
Problem
The increasing pixel density in AMOLED display substrates limits the design space, necessitating an optimized pixel circuit structure and manufacturing process to improve display performance.
Innovation Solution
The display substrate features interconnected pixel electrodes with specific geometric configurations, including main body and connection portions, and non-overlapping orthogonal projections to enhance layout efficiency and light transmittance, while maintaining pixel circuit functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If pixel density is increased in AMOLED display substrates, then display resolution is improved, but design space of each pixel is reduced
Solution Approach 1:
The pixel electrode connection portion extends in a direction intersecting with the arrangement direction of sub-pixels (second direction at 80-100° angle), utilizing a different spatial dimension for routing connections. This allows the connection to pass through the orthogonal projection area of adjacent pixel electrodes without increasing the pixel pitch, effectively using dimensional optimization to resolve the space constraint.
Solution Approach 2:
The pixel electrode is designed with an asymmetric structure where the connection portion has a specific geometric configuration that is optimized for routing in the intersecting direction. The connection portion includes specific features like bending portions and compensation portions that create an asymmetric layout, allowing efficient space utilization while maintaining electrical connection functionality.
2Ease of manufacture
If pixel electrode connection portion overlaps with adjacent pixel electrodes, then manufacturing is simplified, but light transmittance is reduced
Solution Approach 1:
The connection portion is routed in the second direction (intersecting at 80-100°) rather than parallel to the sub-pixel arrangement direction. This dimensional change allows the connection to pass through the orthogonal projection area of adjacent pixel electrodes in a way that minimizes overlap with the light-emitting regions, maintaining light transmittance while achieving continuous electrical connection.
Solution Approach 2:
The pixel electrode structure is designed with different local characteristics: the main body portion maintains a shape matching the light-emitting region for optimal light emission, while the connection portion has a specifically designed geometric configuration optimized for routing. The connection portion includes bending portions and compensation portions that locally adapt to routing requirements without affecting the light-emitting quality of the main body.
Data Source
AI summary
A display substrate includes a base substrate and a plurality of sub-pixels. A sub-pixel includes a pixel electrode and an effective light-emitting region. The pixel electrode includes a main body portion and a connection portion that are interconnected. Shapes of the main body portion and the effective light-emitting region are the same, and at least partial borders of the main body portion and the pixel electrode coincide. The plurality of sub-pixels at least includes a first sub-pixel and a second sub-pixel, and light emitted by the first sub-pixel and second sub-pixel is the same.