Liquid Crystal Display Spacer Segmentation for Cell Gap Uniformity
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Solution Overview
Problem
In liquid crystal displays, column spacers can reduce the aperture ratio and cause display quality issues due to variations in cell gap and contact area, leading to smearing and staining.
Innovation Solution
The use of spacers with varying heights and widths, overlapping gate and data conductors, and strategically positioned on the substrate to maintain a uniform cell gap and prevent aperture ratio deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a column spacer is provided in the liquid crystal display, then the cell gap is maintained, but the aperture ratio is decreased and display quality is deteriorated
Solution Approach 1:
The column spacer is divided into multiple segments: a first spacer portion extending in the first direction and a second spacer portion extending in the second direction. This segmentation allows the spacer to maintain cell gap uniformity while minimizing the total area occupied, thereby preserving aperture ratio.
Solution Approach 2:
The first and second spacer portions have different dimensions and extend in different directions from the intersection point. This asymmetric configuration optimizes the spacer's ability to maintain cell gap uniformity in different regions while reducing the overall footprint on the substrate.
2Area of stationary object
If the contact area between the column spacer and the opposite substrate is narrowed, then the aperture ratio is improved, but the support strength is reduced causing smearing
Solution Approach 1:
The spacer contact area is segmented into multiple discrete contact points with the opposite substrate rather than a continuous contact area. This segmentation maintains sufficient support strength through multiple anchor points while minimizing the total contact area to preserve aperture ratio.
Solution Approach 2:
The spacer portions have asymmetric dimensions where the first direction dimension is larger than the second direction dimension. This creates optimal contact geometry with the opposite substrate, ensuring adequate support strength is concentrated at strategic contact points while minimizing overall contact area.
Data Source
AI summary
A liquid crystal display includes: a first insulation substrate; a first gate conductor disposed on the first insulation substrate and in a same layer as a gate line and a second gate conductor disposed on the first insulation substrate and in the same layer as the gate line; a gate insulating layer disposed on the first gate conductor and the second gate conductor; a data conductor disposed on the gate insulating layer and in a same layer as a data line; a thin film transistor disposed on the first insulation substrate; a first spacer disposed on the first insulation substrate; and a second spacer disposed on the first insulation substrate, where heights or widths of the first and second spacers are different from each other and having different heights or widths, and the second spacer overlaps the first gate conductor and the second gate conductor.