Segmented Friction Roller Alignment for Mixed-Size Substrates
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Solution Overview
Problem
Existing rubbing alignment devices are inadequate for uniformly aligning liquid crystal molecules on motherboards with substrates of different sizes, leading to non-uniformity in rubbing alignment and poor display quality.
Innovation Solution
A rubbing alignment device with a friction member comprising multiple friction rollers and a controller system that allows for precise ascending and descending of the rollers based on coordinate information, enabling alignment of substrates of varying sizes without stopping the machine, thus ensuring uniform alignment and improved precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single friction roller is used for rubbing alignment on a motherboard with multiple substrates of different sizes, then the device structure is simple, but the rubbing alignment uniformity deteriorates due to imprint formation at region boundaries
Solution Approach 1:
The single friction roller is divided into multiple independent friction rollers, each capable of independent movement and rubbing operation. This segmentation allows each roller to be independently positioned and controlled, preventing imprint formation at substrate boundaries while maintaining rubbing alignment uniformity across different substrate sizes and regions.
2Manufacturing precision
If multiple friction rollers are used for different substrate regions, then the rubbing alignment uniformity is improved, but the device complexity and control difficulty increase
Solution Approach 1:
The friction rollers are designed with dynamic independence, where each roller can be independently controlled to ascend, descend, and rotate according to the specific substrate region being processed. This dynamic control mechanism, managed by a controller that receives signals from a machine controller, allows complex multi-substrate configurations to be handled through coordinated independent roller movements rather than a single rigid structure.
3Productivity
If substrates of different sizes are processed on the same motherboard, then the motherboard utilization rate is improved, but the rubbing alignment quality deteriorates due to varying substrate dimensions
Solution Approach 1:
Each friction roller is configured with specific local characteristics suited to its designated substrate region. The controller system adjusts the ascending, descending, and rotating parameters of each roller independently to match the specific substrate dimensions and positioning requirements of different regions, ensuring optimal rubbing alignment quality for each substrate size while maintaining high motherboard utilization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for efficient rubbing alignment of substrates of different sizes, preventing poor display issues caused by non-uniformity, reducing waste, and enhancing the precision and efficiency of the alignment process.
Implementation Method 1
a friction roller 11 ascends or descends in the direction of the arrow under the effect of an elevator (not shown)
Data Source
AI summary
A rubbing alignment device, assembly and a rubbing alignment method are disclosed. The rubbing alignment device comprises a friction member including at least two friction rollers, and a friction member controller connected to the friction member for controlling respective friction rollers of the friction member to perform rubbing alignment for the substrates of the motherboard having different sizes, respectively.