Polarizer Transmittance Measurement Correction for Backlight Fluctuation
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Solution Overview
Problem
Current transmittance measuring methods for polarizers are significantly influenced by factors like backlight brightness fluctuations and alignment deviations, leading to large measurement errors and poor accuracy.
Innovation Solution
A transmittance measuring method that involves acquiring an initial transmittance and a correction value for each measuring point, which are then used to determine the accurate transmittance of optical films, reducing errors caused by backlight fluctuations and alignment deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If successive attachment of test samples is used to measure transmittance, then measurement comparison can be performed, but measurement accuracy deteriorates due to backlight brightness fluctuation and alignment deviation
Solution Approach 1:
The patent measures and stores transmittance values of reference optical films at multiple positions before actual measurement. These pre-measured reference values are then used to correct and compensate for variations during subsequent sample measurements, eliminating the need for repeated manual positioning and attachment operations.
Solution Approach 2:
The patent implements a correction mechanism where measured transmittance values are compared against reference values, and correction values are calculated and applied to compensate for deviations caused by backlight fluctuation and alignment variation, creating a feedback loop that continuously improves measurement accuracy.
2Productivity
If manual change of OC is performed to measure different polarizer samples, then sample comparison is enabled, but time consumption increases and measurement accuracy decreases
Solution Approach 1:
The patent pre-measures and stores transmittance values of reference optical films at multiple positions before actual measurement. These pre-measured reference values are then used to correct and compensate for variations during subsequent sample measurements, eliminating the need for repeated manual positioning and attachment operations.
Solution Approach 2:
The patent creates a digital copy of reference measurement data that can be repeatedly used for correction calculations without physical repositioning. The reference transmittance values are stored and reused across multiple sample measurements, replacing the need for manual physical operations with computational correction.
3Measurement precision
If multiple measuring points are used to capture transmittance variations, then measurement comprehensiveness improves, but measurement complexity and time consumption increase
Solution Approach 1:
The patent measures and stores transmittance values of reference optical films at multiple positions before actual measurement. These pre-measured reference values are then used to correct and compensate for variations during subsequent sample measurements, eliminating the need for repeated manual positioning and attachment operations.
Solution Approach 2:
The patent systematically varies the measurement position parameter across multiple points to capture spatial transmittance variations, then uses computational correction based on reference values at each position to standardize results, transforming a complex multi-point physical measurement into a manageable parameter-based correction process.
Data Source
AI summary
Disclosed are a transmittance measuring method, which includes the following operations: acquiring the initial transmittance of a polarizer to be measured at a measuring point; acquiring a transmittance correction value corresponding to the measuring point; determining the transmittance of the polarizer to be measured according to the initial transmittance and the transmittance correction value corresponding to the measuring point.