Retaining Wall Partitioning for Liquid Crystal Flow Control
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Solution Overview
Problem
The phenomenon of 'moving mura' in TFT-LCD displays leads to display non-uniformity, affecting quality and increasing production costs due to uneven brightness and reduced yield.
Innovation Solution
A retaining wall is arranged on the display panel to divide the display region into partitions, hindering the flow of liquid crystals and maintaining a stable liquid crystal amount, thereby reducing display non-uniformity and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If liquid crystal is filled in the display region without partitions, then the manufacturing process is simple, but display non-uniformity occurs due to liquid crystal flow causing moving mura
Solution Approach 1:
The display region is divided into multiple partitions by retaining walls, which segment the liquid crystal into separate regions. This prevents liquid crystal from flowing between partitions and causes moving mura, thereby improving display uniformity while adding controlled structural complexity.
2Quantity of substance
If liquid crystal flows freely between partitions, then the liquid crystal amount can be adjusted, but display non-uniformity occurs due to moving mura
Solution Approach 1:
The retaining walls create isolated partitions that prevent liquid crystal flow between regions. This segmentation allows precise control of liquid crystal amount in each partition while eliminating moving mura, resolving the contradiction between quantity control and display uniformity.
3Manufacturing precision
If the retaining wall height is equal to main spacer height, then the liquid crystal flow is completely blocked, but the device structure becomes more complex
Solution Approach 1:
The retaining wall is integrated with the main spacer structure, allowing the same component to serve dual functions: maintaining cell gap (spacer function) and blocking liquid crystal flow (retaining wall function). This multi-functionality reduces overall structural complexity while achieving complete flow control.
4Manufacturing precision
If the retaining wall width is large, then the liquid crystal flow is effectively blocked, but the aperture ratio decreases
Solution Approach 1:
The retaining wall width is optimized to be just sufficient to block liquid crystal flow at critical locations (where moving mura occurs) rather than uniformly across the entire display region. This localized approach maintains effective flow blocking while preserving aperture ratio in non-critical areas.
Data Source
AI summary
A display panel and a display device are disclosed. The display panel includes a first substrate, a second substrate, and a liquid crystal. The first substrate and the second substrate are aligned and assembled together. The liquid crystal is filled between the first substrate and the second substrate. The display panel further includes a retaining wall that is arranged on the first substrate and that extends toward the second substrate. The retaining wall divides a display region of the display panel into at least two partitions. The liquid crystal is filled in the at least two partitions. The retaining wall obstructs the liquid crystal from flowing across the different partitions.