Visual Function Testing for Optical Properties Across Luminance
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Solution Overview
Problem
Existing visual function examination methods fail to account for various luminance conditions and require subjective evaluation of optical members, leading to inconsistent effectiveness across different lighting conditions.
Innovation Solution
A visual function examination system that objectively evaluates optical characteristics by considering multiple luminance conditions, using a computer-based system to present visual targets and analyze responses, eliminating the need to try multiple optical members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional visual function examination methods are used to evaluate optical characteristics, then the evaluation can be performed under a specific luminance condition, but the effectiveness cannot be maintained under different luminance conditions
Solution Approach 1:
The patent applies dynamics by making the examination system adaptable to varying luminance conditions. The system dynamically adjusts the examination parameters and presents visual targets with different luminance characteristics to evaluate optical member performance across multiple lighting conditions, rather than relying on a single static evaluation point.
Solution Approach 2:
The patent changes the luminance parameter as a key variable in the evaluation process. By conducting visual function examinations under multiple luminance conditions and using the measured data to calculate optical characteristics, the system ensures that the evaluated optical members perform reliably across different lighting environments.
2Measurement precision
If multiple optical members are tried one by one to evaluate optical characteristics, then the evaluation can be performed, but the process requires subjective evaluation and is time-consuming
Solution Approach 1:
The patent uses a visual simulation approach where virtual visual targets are presented through a display device, creating a simulated visual examination environment. This allows quantitative evaluation of optical characteristics without requiring physical trial of multiple optical members, significantly reducing examination time while maintaining measurement precision.
Solution Approach 2:
The patent replaces the mechanical trial-and-error process of physically trying different optical members with a computational system. The examination computer calculates optical characteristics based on visual function data obtained under multiple luminance conditions, substituting the manual mechanical process with automated computational analysis.
3Device complexity
If a single luminance condition is used for visual function examination, then the examination process is simple, but the optical characteristic evaluation is not comprehensive
Solution Approach 1:
The patent segments the visual function examination into multiple stages conducted under different luminance conditions. Each stage evaluates specific visual functions with tailored visual targets appropriate for that luminance level, and the results are integrated to provide comprehensive optical characteristic evaluation.
Solution Approach 2:
The patent adds the luminance condition dimension to the examination process. Instead of conducting examinations in a single luminance state, the system varies luminance as an additional dimension, presenting visual targets with different luminance characteristics to achieve comprehensive evaluation without excessive complexity.
Data Source
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AI summary
An analysis unit determining at least two boundaries by determining; in a coordinate system indicating a correlation between a luminance contrast value between a luminance of an attention portion and a luminance of a background portion, and a luminance average value of an index including the attention portion and the background portion; the boundary between a region where a subject has a visibility and a region where the subject does not have the visibility for each combination of stimulus values of a color stimulus of a visual target.