Rounded-Corner Display Device With Curved Common-Line Routing
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Solution Overview
Problem
Display devices with rounded corner quadrangular shapes face challenges in connecting lines to pixels at the rounded corners, leading to non-uniform line resistances and potential display quality issues.
Innovation Solution
The display device incorporates a common line adjacent to the rounded corners, extending in a curved shape to connect with vertical initialization lines, which are located at different layers and extend in a direction crossing the sides, ensuring uniform line resistances and improved display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If lines are connected to pixels at rounded corners using conventional straight-line routing, then the display device can maintain a simple structure, but the line resistance becomes non-uniform leading to display quality issues
Solution Approach 1:
The common line is configured to extend in a curved shape that corresponds to the rounded corner shape, allowing the line to naturally follow the contour of the rounded corner. This curved configuration ensures uniform line resistance by maintaining consistent distance from pixels along the rounded corner, while avoiding the need for complex routing patterns or additional compensation structures.
2Shape
If the display area has a rounded corner quadrangular shape, then the display device achieves a modern aesthetic design, but connecting lines to pixels at rounded corners becomes more difficult
Solution Approach 1:
The common line extends in a curved shape that matches the rounded corner geometry, enabling straightforward connection to pixels at rounded corners. This curved configuration simplifies the manufacturing process by allowing standard fabrication techniques to be used without requiring complex alignment or additional processing steps for rounded corner connections.
Solution Approach 2:
The common line serves multiple functions: it provides initialization signals to pixels along the entire display area including rounded corners, acts as a reference for voltage compensation, and maintains uniform resistance characteristics. This multi-functional design eliminates the need for separate dedicated lines for different regions of the display.
3Reliability
If vertical initialization lines are extended to rounded corners with conventional routing, then complete pixel coverage is achieved, but line resistance variation increases
Solution Approach 1:
The vertical initialization lines connect to the curved common line at rounded corners, and the common line's curved shape ensures that the electrical path length to pixels at rounded corners is proportional to their distance from the corner. This maintains uniform resistance characteristics across all pixels, ensuring reliable initialization while achieving complete pixel coverage.
Data Source
AI summary
A display device includes: pixels in a display area; scan lines connected to the pixels; data lines connected to the pixels; vertical initialization lines connected to the pixels; and a common line in a non-display area around the display area. The display area includes: a first side extending in a first direction; a second side adjacent to one end of the first side, and extending in a second direction crossing the first direction; and a first rounded corner connecting the one end of the first side to one end of the second side that is adjacent to the one end of the first side. The common line is adjacent to the first side and the first rounded corner, and the vertical initialization lines are adjacent to the first side and the first rounded corner, are connected to the common line, and extend from the common line in the second direction.