Photo Alignment Device for Multi-Directional LCD Substrates
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Solution Overview
Problem
The existing rubbing alignment process for liquid crystal display panels is inefficient when multiple array substrates or color filter substrates require different alignment directions, as it increases technological difficulty and is no longer applicable for non-uniform alignment directions.
Innovation Solution
A device and method for photo alignment that includes a linearly polarized light source and a control assembly between the light source and a bearing platform, allowing for the adjustment of polarization directions of polarized light to align multiple substrates with different alignment areas simultaneously, using a control assembly with multiple control modules to adjust polarization directions for each alignment area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If rubbing alignment process is used for uniform alignment directions, then alignment capability is achieved, but it becomes inapplicable when different alignment directions are required for multiple substrates
Solution Approach 1:
The patent replaces the mechanical rubbing alignment system with a photo alignment system using polarized light. The linearly polarized light source and control assembly enable alignment through optical fields rather than mechanical contact, allowing different alignment directions to be achieved by adjusting light polarization angles without increasing mechanical process complexity
Solution Approach 2:
The patent changes the alignment control parameter from mechanical rubbing direction to light polarization angle. By adjusting the polarization direction of the linearly polarized light through the control assembly, different alignment directions can be precisely controlled for multiple substrates simultaneously, enhancing adaptability while maintaining process simplicity
2Manufacturing precision
If rubbing alignment is performed for each substrate requiring different directions, then alignment precision is maintained, but processing time increases and work efficiency decreases
Solution Approach 1:
The patent merges multiple alignment operations into a single photo alignment process. The linearly polarized light source illuminates multiple substrates simultaneously, and the control assembly adjusts polarization directions to align all substrates in one operation, maintaining precision while dramatically improving productivity by eliminating sequential processing
Solution Approach 2:
The photo alignment system serves multiple substrates with different alignment requirements through a single universal apparatus. The control assembly can independently adjust polarization angles for different regions, enabling one system to perform multiple alignment functions simultaneously, thereby enhancing both precision and efficiency
3Adaptability or versatility
If multiple rubbing operations are performed for different alignment directions, then alignment capability is achieved, but the process becomes technologically complex and difficult to implement
Solution Approach 1:
The patent replaces complex mechanical rubbing operations with a unified photo alignment system. The linearly polarized light source and control assembly provide a technologically simpler approach where multi-directional alignment capability is achieved through optical parameter adjustment rather than multiple mechanical processes
Solution Approach 2:
The patent uses parameter changes in light polarization to achieve multi-directional alignment instead of changing mechanical rubbing directions. The control assembly adjusts the polarization angle parameter of the linearly polarized light to control alignment directions, simplifying the technological implementation while maintaining high adaptability
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 approach simplifies the alignment process, reduces time, enhances precision, and improves work efficiency by enabling alignment in multiple directions simultaneously, overcoming the limitations of traditional methods.
Implementation Method 1
the linearly polarized light source is configured for providing a first polarized light to the control assembly; the control assembly is configured for adjusting a polarization direction of the first polarized light, and configured for providing a second polarized light to the plurality of alignment areas
Data Source
AI summary
A device for photo alignment includes: a bearing platform; a linearly polarized light source located at one side of the bearing platform; and a control assembly located between the linearly polarized light source and the bearing platform. One side of the bearing platform close to the control assembly is configured for placing a large plate glass to be aligned, and the large plate glass to be aligned includes a plurality of alignment areas; the linearly polarized light source is configured for providing a first polarized light to the control assembly; the control assembly is configured for adjusting a polarization direction of the first polarized light, and configured for providing a second polarized light to the plurality of alignment areas included in the large plate glass to be aligned; and polarization directions of the second polarized light respectively corresponding to at least two alignment areas are different.