Display Device Electrical Lines with Bridge and Lead-Out Routing
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Solution Overview
Problem
Current display devices face challenges in efficiently controlling pixel electrodes to achieve precise voltage distribution and image display, particularly due to the complexity of electrical connections and the need for smaller bezels, which affects the uniformity and accuracy of light manipulation in the display area.
Innovation Solution
The display device incorporates a second substrate with source lines, gate lines, gate lead-out lines, and bridge lines that are strategically arranged to connect the source driver and gate driver to pixel electrodes, allowing for efficient voltage control and image display, with spacers maintaining the correct spacing between substrates to prevent liquid crystal layer squeezing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the source driver and gate driver are disposed along the same side of the display area, then the device complexity is reduced and manufacturing is simplified, but the bezel size increases
Solution Approach 1:
The electrical connection system is segmented into multiple components: source lines extending in a first direction, gate lines extending in a second direction, gate lead-out lines extending in the first direction, and bridge lines extending in the second direction. This segmentation allows drivers to be positioned at corners rather than along entire edges, reducing bezel size while maintaining functional simplicity
Solution Approach 2:
The electrical line architecture transitions from a conventional single-direction routing to a two-dimensional grid pattern where source lines and gate lines intersect. This dimensional change enables corner placement of drivers, optimizing both bezel size and manufacturing complexity simultaneously
2Manufacturing precision
If electrical lines are arranged to optimize voltage distribution, then image display quality improves, but the structural complexity of the second substrate increases
Solution Approach 1:
Different regions of the second substrate are assigned different line types with specific functions: source lines for voltage input, gate lines for pixel control, lead-out lines for driver connection, and bridge lines for interconnection. Each line type is optimized for its specific role, achieving uniform voltage distribution while maintaining manageable structural complexity through functional specialization
Solution Approach 2:
The bridge lines serve multiple functions: they connect gate lead-out lines to gate lines, provide additional voltage distribution paths, and enable the corner placement of drivers. This multi-functionality reduces the need for separate dedicated connection structures, balancing voltage uniformity with structural simplicity
Data Source
AI summary
A display device includes a display area, a source driver, a gate driver, a first substrate, a second substrate, and a liquid crystal layer. The liquid crystal layer is disposed between the first substrate and the second substrate. The second substrate includes source lines, gate lines, gate lead-out lines, and bridge lines. The source lines are electrically connected to the source driver. The gate lead-out lines electrically connect the gate driver to the gate lines. The bridge lines connect pairs of the gate lead-out lines that are adjacent in the second direction. At least one of the gate lines is electrically connected to the gate driver via at least two of the gate lead-out lines and one of the bridge lines.