Circular Display Substrate Circuit Layout Efficiency
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Solution Overview
Problem
Conventional display devices with quadrangular substrates have inefficient circuit layouts in their peripheral areas, leading to increased resistive loads due to wiring length differences, which affect the display's efficiency and quality.
Innovation Solution
A circular display substrate with a circular pixel area and a driving portion in the peripheral area, featuring scan and data circuits with conductive patterns that extend perpendicularly to the boundary, reducing wiring length differences and improving circuit layout efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a quadrangular substrate with conventional circuit layout is used, then the display device structure is simple and easy to manufacture, but the circuit layout efficiency in the peripheral area is low and wiring length differences increase causing higher resistive loads
Solution Approach 1:
The patent applies curvature by transitioning from a conventional quadrangular substrate to a circular substrate. This curved geometry allows the peripheral area to be uniformly distributed around the pixel area, enabling more efficient circuit layouts with reduced wiring length differences. The circular shape eliminates the corner regions in quadrangular substrates where wiring paths are unnecessarily long, thereby reducing resistive loads while maintaining manufacturing feasibility.
2Adaptability or versatility
If the peripheral area is increased to accommodate driving circuits, then circuit layout flexibility improves, but wiring length differences increase leading to higher resistive loads
Solution Approach 1:
The patent implements equipotentiality by arranging the driving circuits in the peripheral area such that all connection points to the pixel area are equidistant from the boundary. This is achieved through the circular geometry where circuits are positioned at uniform radial distances, ensuring equal wiring lengths and thus equal electrical potential conditions. This eliminates potential differences and reduces resistive energy loss while maintaining the flexibility to accommodate various driving circuit configurations.
3Ease of manufacture
If conventional wiring patterns are used in the peripheral area, then manufacturing process is simple, but wiring length differences cause increased resistive loads affecting display quality
Solution Approach 1:
The patent applies asymmetry in a functional sense by positioning the driving circuits at specific locations in the peripheral area that are optimized for uniform distance to the pixel area. While the overall circular substrate maintains symmetry, the circuit placement uses asymmetric positioning relative to traditional quadrangular layouts, achieving uniform wiring lengths that reduce resistive loads and improve display quality without complicating the manufacturing process.
Data Source
AI summary
A display substrate and a display device including the display substrate are disclosed. In one aspect, the display substrate includes a plurality of pixels formed in a substantially circular pixel area and a driving circuit formed in a peripheral area surrounding the pixel area and configured to drive the pixels. A boundary is formed between the pixel area and the peripheral area, and the boundary is substantially concentric with respect to an arc defining the substantially circular pixel area. The driving circuit comprises a conductive pattern having a first side which extends in a peripheral direction crossing the boundary.


