Display Panel Spacing Platform to Prevent PS-Mura Defects
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Solution Overview
Problem
Existing liquid crystal display panels suffer from PS-Mura-type imperfects due to post spacers (PS) intruding into the opening area, despite the presence of barrier layers, caused by the organic film layer burying the barrier layer and failing to prevent displacement.
Innovation Solution
Incorporating a spacing platform on the second base plate opposite to the post spacer, reducing the post spacer's height and maintaining a stable cell gap, thereby preventing the post spacer from scratching the alignment film during external force displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a barrier layer is provided to prevent post spacer intrusion, then the display quality is improved, but the organic film layer buries the barrier layer causing the post spacer to still intrude into the opening area
Solution Approach 1:
The spacing function is divided into two independent components: a post spacer on the first base plate and a spacing platform on the second base plate. This segmentation allows each component to bear part of the spacing function, reducing the post spacer height and preventing it from intruding into the opening area while maintaining the required cell gap.
Solution Approach 2:
The spacing platform acts as an intermediary structure between the post spacer and the second base plate. It provides additional spacing support and prevents the post spacer from directly contacting or intruding into the opening area, thereby protecting the alignment film from scratching.
2Object-affected harmful factors
If the post spacer height is reduced to prevent intrusion, then the alignment film is protected from scratching, but the cell gap stability may be affected
Solution Approach 1:
The spacing function is segmented between the post spacer and the spacing platform. The post spacer maintains a reduced height to avoid intrusion, while the spacing platform compensates by providing additional spacing support, together maintaining the required cell gap stability.
Solution Approach 2:
The spacing function of the post spacer and the spacing platform is merged to achieve the required cell gap. Both structures work together to maintain the liquid crystal layer thickness, ensuring cell gap stability while the post spacer remains short enough to prevent alignment film damage.
3Reliability
If the post spacer height is reduced, then the probability of bright-spot imperfects is reduced, but the spacing function must be redistributed
Solution Approach 1:
The spacing function is segmented into two independent structures. The post spacer on the first base plate and the spacing platform on the second base plate can be manufactured separately using standard LCD manufacturing processes, making the implementation straightforward despite the additional structure.
Solution Approach 2:
The spacing platform serves multiple functions: it provides spacing support, prevents post spacer intrusion, and can be integrated with existing manufacturing processes. This multi-functionality simplifies the overall manufacturing complexity by consolidating several requirements into a single structure.
Data Source
AI summary
A manufacturing method of a display panel, a display panel and a displaying device. The display panel includes an opening area and a non-opening area, and the display panel includes: a first base plate and a second base plate arranged in align with each other, and a liquid-crystal layer between the first base plate and the second base plate. The first base plate includes: a first substrate, and a post spacer provided on one side of the first substrate that is close to the second base plate. The second base plate includes: a second substrate, and a spacing platform provided on one side of the second substrate that is close to the first base plate, wherein the spacing platform is located within the non-opening area. The post spacer is arranged opposite to the spacing platform.