Rubbing-Cloth Suction Cleaning for Particle-Free Alignment Films
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Solution Overview
Problem
The existing methods for removing particles from rubbing-cloths used in the rubbing process for aligning liquid crystal molecules are inefficient, leading to prolonged processing times and potential scratches on alignment films due to residual particles.
Innovation Solution
A rubbing-cloth cleaning apparatus comprising a rubbing-cloth fixing unit, a pile removing head with a suction mechanism, and a transferring unit that allows for precise removal of particles from the rubbing-cloth, facilitating quick and effective particle removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional manual or simple cleaning methods are used to remove particles from rubbing-cloth, then the process is simple to operate, but the particle removal is incomplete and time-consuming
Solution Approach 1:
The patent employs a suction device with a suction nozzle that generates negative pressure to automatically remove particles from the rubbing-cloth. The suction device includes a suction pump connected to the suction nozzle through a suction pipe, creating a pneumatic system that efficiently extracts particles without manual intervention, thereby improving cleaning efficiency and reducing cleaning time
2Reliability
If particles are not completely removed from rubbing-cloth, then cleaning time is reduced, but scratches occur on alignment film
Solution Approach 1:
The suction device is designed to automatically move along with the rubbing-cloth cleaning process. The suction nozzle is positioned to continuously track and remove particles as the rubbing-cloth moves, enabling the system to maintain high cleaning standards without requiring additional manual operations, thus ensuring alignment film quality while maintaining productivity
3Productivity
If a suction device is added to the cleaning apparatus, then particle removal efficiency improves, but device complexity increases
Solution Approach 1:
The suction device is integrated into the existing rubbing-cloth cleaning apparatus by combining the suction nozzle with the cleaning mechanism. The suction pump and control system are merged with the overall apparatus structure, allowing particle removal functionality to be added without creating a completely separate complex system
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 apparatus efficiently removes particles from the rubbing-cloth, reducing the time required for cleaning and preventing scratches on alignment films, thereby enhancing the processing of liquid crystal display devices.
Implementation Method 1
a pile removing head sucking the particles disposed on the rubbing-cloth to remove the particles from the rubbing-cloth
Data Source
AI summary
Provided is an apparatus for cleaning a rubbing-cloth. The apparatus includes a rubbing-cloth fixing unit, a pile removing head, and a transferring unit. The rubbing-cloth fixing unit is fixed to a base body and fixes a rubbing-cloth that is substantially unfolded. The pile removing head is disposed on the rubbing-cloth fixing unit and sucks and removes the piles attached onto the rubbing-cloth. The transferring unit is fixed to the base body and transfers the pile removing head along an upper surface of the rubbing-cloth with respect to the rubbing-cloth fixing unit. Accordingly, particles that are generated when a rubbing-cloth is cut out from a fabric are quickly removed from the rubbing-cloth, so that scratches may be prevented from being generated on an alignment film.