Roll Printing Device for Liquid Crystal Display Orientation Film Deposition
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Solution Overview
Problem
Existing roll printing devices for depositing orientation films on liquid crystal display devices require increased space when applied to large-sized substrates, leading to reduced space utilization and inefficient operation.
Innovation Solution
A roll printing device design where the printing roll is movable on a fixed substrate stage, allowing the orientation material to be deposited directly onto the substrate without moving the substrate stage, and the use of vibration dampeners to prevent or reduce vibrations during the printing process, ensuring uniform deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the substrate stage is moved to deposit orientation material on large substrates, then the deposition coverage is improved, but the device occupies increased space and space utilization deteriorates
Solution Approach 1:
Instead of moving the substrate stage to achieve deposition coverage, the patent inverts the approach by moving the printing roll over the stationary substrate. This allows large substrate coverage while keeping the device footprint compact, as the printing roll travels across the substrate rather than moving the entire substrate stage.
Solution Approach 2:
The patent introduces dynamic movement of the printing roll along the substrate surface while maintaining a fixed substrate stage. This dynamic positioning of the printing roll enables coverage of large substrate areas without requiring the substrate stage to move, thereby maintaining compact device dimensions.
2Volume of moving object
If the printing roll moves on a fixed substrate stage, then space utilization is improved, but deposition uniformity may deteriorate due to vibrations
Solution Approach 1:
The patent applies preliminary anti-action by using vibration dampeners to counteract vibrations before they can affect deposition uniformity. The vibration dampeners are integrated into the printing roll assembly to preemptively reduce vibrations during the printing process, ensuring consistent material deposition despite the moving printing roll configuration.
3Manufacturing precision
If vibration dampeners are added to reduce vibrations, then deposition uniformity is improved, but device complexity increases
Solution Approach 1:
The patent merges the vibration dampening function with the printing roll structure itself. The vibration dampeners are integrated into the printing roll assembly, combining multiple functions (printing and vibration control) into a single integrated component, thereby minimizing additional complexity while achieving improved deposition uniformity.
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
This configuration reduces the space occupied by the roll printing device when handling large substrates and enhances the uniformity of the orientation film deposition, maintaining efficiency and space utilization.
Implementation Method 1
an anilox roll to receive a designated material dispensed by the dispenser
Implementation Method 2
a printing roll engaged with the anilox roll to rotate therewith to receive the designated material supplied from the anilox roll
Data Source
AI summary
A roll printing device, a roll printing method, and a method for manufacturing a liquid crystal display device using the same. The roll printing device includes a dispenser; an anilox roll to receive a designated material dispensed by the dispenser; a printing roll engaged with the anilox roll to rotate with the printing roll to receive the designated material supplied from the anilox roll; and a substrate stage fixed below the printing roll for mounting a substrate. The printing roll is movable on the substrate stage to deposit the designated material on the substrate.