Reciprocating UV Light Source for Polymer Stabilized VA Panel Alignment
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Solution Overview
Problem
Conventional manufacturing processes for polymer stabilized vertical alignment (PS-VA) liquid crystal panels result in non-uniform ultraviolet light accumulation, leading to displaying defects due to fixed light sources with equally-spaced ultraviolet light sources, causing localized light accumulation issues.
Innovation Solution
An alignment device and manufacturing method that utilizes a light source with multiple ultraviolet light sources distributed in a parallel and equally spaced manner, which moves reciprocally to homogenize the ultraviolet light accumulation on the ultraviolet-curable resin within the liquid crystal layer, ensuring uniform light distribution by adjusting movement distances and speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed light source with equally-spaced ultraviolet light sources is used, then the manufacturing process is simple, but the ultraviolet light accumulation becomes non-uniform causing displaying defects
Solution Approach 1:
The patent transforms the fixed light source into a movable one that reciprocates along the liquid crystal panel during UV irradiation. This dynamic movement compensates for the inherent non-uniformity of equally-spaced light sources, ensuring uniform ultraviolet light accumulation across the entire panel while maintaining process simplicity
Solution Approach 2:
The light source performs periodic reciprocating motion during the UV irradiation process. By moving back and forth between extreme positions and irradiating at specific intervals, the system ensures that each region of the liquid crystal panel receives consistent ultraviolet light exposure, eliminating localized accumulation defects
2Device complexity
If equally-spaced ultraviolet light sources are used, then the light source structure is simple, but localized displaying defects occur due to non-constant light accumulation
Solution Approach 1:
The patent introduces reciprocating motion to the light source, transforming it from a static to a dynamic system. This movement allows the simple equally-spaced light source structure to achieve uniform light distribution across the panel, eliminating displaying defects without complicating the light source design
Solution Approach 2:
The reciprocating motion acts as an intermediary mechanism that mediates between the simple equally-spaced light source structure and the requirement for uniform light accumulation. By controlling the movement pattern, the system bridges the gap between structural simplicity and displaying reliability
3Ease of operation
If the light source is fixed during exposure, then the manufacturing process is straightforward, but non-uniform light accumulation causes displaying defects
Solution Approach 1:
The patent converts the fixed light source into a reciprocating one that moves along the panel during exposure. This dynamic operation maintains ease of use while achieving uniform light accumulation, as the movement pattern is automatically controlled to ensure consistent UV irradiation across all regions
Solution Approach 2:
The system incorporates control mechanisms that monitor and adjust the light source movement to ensure uniform light exposure. By providing feedback on the irradiation process, the system maintains manufacturing precision while keeping the operation straightforward and automated
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 effectively eliminates displaying defects, increases the success rate of PS-VA liquid crystal panel manufacturing, improves panel quality, reduces the likelihood of poor products, and indirectly lowers costs by ensuring consistent light exposure.
Implementation Method 1
the liquid crystal layer comprises negative liquid crystal molecules and ultraviolet-curable resin
Data Source
AI summary
A manufacturing method for a polymer stabilized vertical alignment (PS-VA) liquid crystal panel includes: forming a first substrate of PS-VA liquid crystal panel, the first substrate including a common electrode; forming a second substrate of the PS-VA liquid crystal panel, the second substrate including a pixel electrode; forming a liquid crystal layer between the first and second substrates, the liquid crystal layer containing negative liquid crystal molecules and ultraviolet-curable resin; applying an electrical voltage that exceeds a rotation threshold of the liquid crystal layer to the common electrode and the pixel electrode; and reciprocally moving an ultraviolet light source, which is composed of at least two ultraviolet light sources that are distributed parallel to each other in a first direction and respectively extend in a second direction, in such a direction as to have accumulation of ultraviolet light received by the ultraviolet-curable resin of the liquid crystal layer homogenized.