Display Device Gate Line Routing for Narrow Bezel
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Solution Overview
Problem
The challenge in display devices is to minimize the non-display area (bezel) while avoiding the increase in gate line length, which can lead to brightness differences due to the diagonal disposition of gate lines, requiring additional vertical lines that elongate the gate lines and affect brightness uniformity.
Innovation Solution
A display device configuration where gate and data drivers are positioned together on one side, utilizing vertical, diagonal, and crossing lines with step-like shapes to minimize line length and prevent brightness differences, with sub-pixels operating in an inversion driving scheme to prevent coupling and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If gate lines are disposed in a diagonal direction to reduce non-display area, then the non-display area is reduced, but the gate line length increases causing brightness difference
Solution Approach 1:
The gate line configuration is segmented into multiple sections: first gate lines extending diagonally from the gate driver, second gate lines extending vertically from the first gate lines, and third gate lines extending diagonally to reach pixel rows. This segmentation allows the gate lines to reach distant pixel rows without excessive total length, maintaining brightness uniformity while enabling narrow bezel design.
Solution Approach 2:
The gate line routing transitions from a single diagonal dimension to a multi-dimensional path combining diagonal and vertical segments. This dimensional change allows the gate lines to efficiently cover the display area without excessive length accumulation, resolving the brightness uniformity issue while maintaining the reduced non-display area.
2Reliability
If additional vertical gate lines are added to connect all gate lines to the gate driver, then complete connection is achieved, but the gate line length increases greatly causing increased load and brightness difference
Solution Approach 1:
The gate line network is divided into hierarchical segments: first gate lines for initial diagonal extension, second gate lines for vertical connection, and third gate lines for final diagonal extension to pixel rows. This segmentation ensures complete connection to all pixel rows while controlling total line length and maintaining brightness uniformity.
Solution Approach 2:
The gate line configuration dynamically adapts its routing pattern based on position: diagonal routing near the gate driver, vertical routing in intermediate regions, and diagonal routing toward pixel rows. This dynamic routing strategy optimizes connection efficiency and maintains uniform brightness across the display.
3Device complexity
If gate and data drivers are disposed at opposite sides to maintain simple line routing, then line routing is simple, but the non-display area increases
Solution Approach 1:
Both the gate driver and data driver are merged and disposed at the same side of the display panel. This merging enables the use of diagonal gate lines extending directly from the gate driver to pixel rows, significantly reducing the non-display area while the multi-segmented line configuration maintains manageable routing complexity.
Solution Approach 2:
The line routing utilizes diagonal dimensions instead of strictly horizontal or vertical paths. This dimensional change allows both drivers to be positioned at one side while maintaining efficient connections to pixel rows across the display area, reducing bezel width without excessive routing complexity.
Data Source
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AI summary
A display device includes a display panel including sub-pixels, a first driver adjacent to a first side of the display panel to generate first signals, and a second driver adjacent to the first side to generate second signals. The display panel includes vertical lines including one ends disposed at the first side to apply the first signals to the sub-pixels, diagonal lines crossing the vertical lines to apply the second signals to the sub-pixels, and crossing lines crossing the vertical and diagonal lines. The diagonal lines include first diagonal lines including one ends at the first side and second diagonal lines including one ends at a second side adjacent to the first side. The crossing lines include one ends at the first side and the other ends at the second side. The crossing lines receive the second signals and apply the second signals to the second diagonal lines.