LCD Support Pillar Layout to Prevent Data Pad Side Yellowing
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Solution Overview
Problem
The issue of yellowing in local areas of LCD panels, particularly at the data pad side, occurs due to the overlap between Post Spacer Bars and the polyimide film, leading to abnormal thickness and reduced display quality.
Innovation Solution
The display panel design includes support pillars arranged in specific directions and densities to minimize overlap with alignment layer aggregation, reducing the probability of yellowing by optimizing the distribution and alignment of support pillars relative to wiring areas and alignment layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If support pillars are arranged in the non-display area, then structural support is improved, but yellowing occurs due to overlap with alignment layer aggregation
Solution Approach 1:
The patent applies local quality by differentiating the arrangement of support pillars in different regions. In the non-display area, support pillars are arranged perpendicular to the side edge of the first wiring area to avoid overlap with alignment layer aggregation, while in the display area, support pillars are arranged parallel to the side edge. This region-specific arrangement eliminates yellowing in the non-display area while maintaining structural support functionality.
2Reliability
If alignment layer extends into the non-display area, then alignment function is improved, but overlap with support pillars causes abnormal thickness
Solution Approach 1:
The patent applies asymmetry by arranging support pillars perpendicular to the side edge of the first wiring area in the non-display area, creating an asymmetric arrangement relative to the alignment layer extension. This asymmetric perpendicular arrangement ensures that support pillars do not overlap with the alignment layer aggregation, maintaining both the alignment function and uniform film thickness without the abnormal thickness caused by overlap.
3Stability of the object's composition
If support pillars are densely distributed, then mechanical stability is improved, but probability of overlap with wiring areas increases
Solution Approach 1:
The patent applies dimensionality change by altering the orientation dimension of support pillar arrangement. Instead of arranging support pillars parallel to the wiring areas (one-dimensional alignment), they are arranged perpendicular to the side edge of the first wiring area, transitioning to a different spatial dimension. This dimensional change allows for dense distribution maintaining mechanical stability while eliminating overlap with wiring areas and preventing yellowing.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes: an opposite substrate and a display substrate arranged opposite to each other, and multiple support pillars between the opposite substrate and the display substrate. The display substrate includes a display area and a non-display area surrounding the display area. The non-display area includes a first wiring area. The multiple support pillars include first support pillars in the display area and second support pillars in the non-display area. Partial support pillars corresponding to the first wiring area among the second support pillars extend in a direction perpendicular to an extending direction of the side edge of the first wiring area.