Display Data Line Detour Layout for Narrow Bezel Routing
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Solution Overview
Problem
As the number of data lines increases to improve resolution in display devices, the width of the non-display area increases, leading to a decrease in the display area ratio, which deteriorates the display quality.
Innovation Solution
The display device incorporates a detour area with a detour middle area and side areas, where data lines and dummy lines are strategically routed to reduce the width of the non-display area without compromising resolution, using a circuit layer with pixel drivers, data lines, and dummy lines on a via layer to efficiently transmit data signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of data lines increases to improve resolution, then the resolution is improved, but the width of the non-display area increases
Solution Approach 1:
The patent introduces a via layer that extends in the thickness direction (third direction) to connect data lines between different layers. This vertical routing approach allows data lines to be arranged in multiple horizontal layers, effectively utilizing the third dimension to reduce the width requirement of the non-display area while maintaining high resolution through increased data line density.
Solution Approach 2:
The patent divides the data line routing into multiple segments across different layers. The via layer creates intermediate connection points that segment the overall data transmission path, allowing data lines to be distributed across multiple horizontal planes rather than confined to a single plane, thereby reducing the required width of the non-display area.
2Measurement precision
If the number of data lines increases to improve resolution, then the resolution is improved, but the display area ratio decreases
Solution Approach 1:
By utilizing the via layer to route data lines vertically through the thickness direction, the patent enables higher data line density without proportionally increasing the non-display area width. This allows more data lines to be packed into the same display area footprint, improving resolution while maintaining or even increasing the display area ratio.
3Ease of operation
If data supply lines are disposed in the non-display area to connect data lines to the display driving circuit, then the data transmission is enabled, but the width of the non-display area increases
Solution Approach 1:
The via layer provides a vertical pathway that allows data supply lines to connect to data lines from different horizontal layers without requiring extended lateral routing in the non-display area. This three-dimensional routing approach enables efficient data transmission while minimizing the width occupation in the non-display area.
Solution Approach 2:
The via layer acts as an intermediary structure that facilitates vertical connection between data lines on different layers. This intermediate connection mechanism enables data supply lines to access multiple data lines through a compact vertical interface, reducing the need for extensive lateral routing space in the non-display area.
Data Source
AI summary
A display device includes a substrate and a circuit layer. The circuit layer includes pixel drivers; data lines; a first transmission detour line electrically connected to, among the data lines, a first data line and extending in a first direction; and a second transmission detour line adjacent to, among the data lines, a second data line, extending in a second direction, and electrically connected to the first transmission detour line. The first transmission detour line includes a first main stream extending in the first direction between the first data line and the second transmission detour line; a first sub-branch extending in the second direction from the first main stream, and overlapping a part of the first data line; and a second sub-branch extending in the second direction from the first main stream, and overlapping a part of the second transmission detour line.