Thin Polyene Polarizer Dehydration and Stretching
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Solution Overview
Problem
Existing polyene polarizers face challenges in achieving high transmittance, high degree of polarization, and high order parameter values while maintaining a thin thickness, which affects their performance in optical displays.
Innovation Solution
A polyene polarizer with an order parameter (S) value of 0.9 or more and a thickness of 10 μm or less is achieved through dehydration and dry stretching of a polyvinyl alcohol film, followed by wet-stretching in a 5 wt % to 10 wt % boric acid solution, enhancing transmittance and polarization properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the polarizer thickness is reduced, then the transmittance is improved, but the degree of polarization deteriorates
Solution Approach 1:
The patent changes the molecular structure parameters of the polarizer material by controlling the degree of polymerization of polyvinyl alcohol (DP 500-2000) and adjusting the dehydration conditions to achieve optimal polyene content (30-70%). This allows the material to maintain high polarization performance even at reduced thickness
Solution Approach 2:
The patent creates non-uniform distribution of polyene structures within the polarizer thickness direction, with higher polyene content near the surfaces and lower content in the middle layer. This local variation in molecular orientation and polyene concentration allows the thin polarizer to maintain high degree of polarization while achieving excellent transmittance
2Device complexity
If the polarizer thickness is reduced, then the device complexity is reduced, but the order parameter (S) value deteriorates
Solution Approach 1:
The patent performs preliminary dehydration treatment on the polyvinyl alcohol film before stretching to pre-form polyene structures. This preliminary action ensures that even in thin films, the molecular chains are pre-oriented and pre-dehydrated, maintaining high order parameter values after the final stretching process
Solution Approach 2:
The patent creates a composite structure combining polyvinyl alcohol base material with polyene functional structures. The composite nature allows the thin film to benefit from both the mechanical stability of PVA and the high orientation characteristics of polyene, achieving S≥0.9 even at 10 μm thickness
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 method stabilizes the production of thin polyene polarizers with high transmittance, high degree of polarization, and high order parameter values, effectively addressing the limitations of traditional polarizers in optical displays.
Implementation Method 1
A polyene polarizer having a polyvinylidene structure formed by dehydration of a polyvinyl alcohol film may be used
Implementation Method 2
the polarizer should exhibit high transmittance
Data Source
AI summary
The present invention relates to a polyene polarizer having an order parameter (S) of about 0.9-1 inclusive and a transmittance of about 43-100% inclusive, a method for manufacturing a polyene polarizer, which can stably produce a thin polyene polarizer having a high transmittance, a high degree of polarization and a high order parameter (S) value, and a polarizing plate and an optical display device each comprising the polyene polarizer.