Color Filter Selection Using Chromatic Visual Performance Testing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing color filter selection methods rely on subjective preferences, failing to optimize visual performance for specific tasks and environments due to the lack of objective quantification of visual performance.
Innovation Solution
A method and system for selecting a color filter by submitting a subject to a colored spatio-temporal visual stimulus with varying chromaticity, evaluating visual performance, and choosing a filter based on objective measurements to enhance visual tasks in given environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple color filters are measured and evaluated to ensure optimal performance, then the quality and consistency of light transmission is improved, but the time and complexity of the selection process increases
Solution Approach 1:
The patent transforms the complex multi-parameter evaluation of color filters into a single dominant parameter (luminous flux) by using photopic and scotopic luminous flux measurements. This parameter transformation allows rapid comparison and selection of filters without requiring comprehensive measurement of all optical properties, thus resolving the contradiction between measurement thoroughness and selection speed.
Solution Approach 2:
The patent introduces luminous flux as an intermediary metric that mediates between the complex spectral characteristics of color filters and the practical requirement for rapid selection. By using luminous flux values (particularly the ratio of photopic to scotopic luminous flux), the system provides a simplified comparison mechanism that maintains quality assurance while dramatically reducing selection time.
2Measurement precision
If color filters are selected based on comprehensive spectral measurements, then the accuracy of color rendering is improved, but the device complexity and measurement requirements increase
Solution Approach 1:
The patent extracts the essential information needed for color filter selection by focusing on luminous flux measurements under different illuminants rather than requiring complete spectral characterization. This extraction approach captures the critical performance aspects (color rendering under various lighting conditions) while eliminating the need for complex spectral measurement equipment and procedures.
Solution Approach 2:
The patent employs relatively simple and inexpensive photometric measurements (luminous flux under standard illuminants) instead of expensive and complex spectral radiometry equipment. This approach uses accessible, well-established measurement methods that provide sufficient accuracy for practical filter selection without requiring sophisticated instrumentation.
3Adaptability or versatility
If the selection process considers multiple illuminants and viewing conditions, then the adaptability of the lighting system is improved, but the complexity of evaluation and selection increases
Solution Approach 1:
The patent creates a universal selection criterion (luminous flux ratio under photopic and scotopic conditions) that works across multiple illuminants and application scenarios. This single evaluation metric provides multi-functionality by assessing filter performance under various lighting conditions (daylight, incandescent, fluorescent, LED) without requiring separate evaluation procedures for each condition, thus maintaining adaptability while simplifying the process.
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 optimizes visual performance by personalizing color filters to individual chromatic sensitivity, enhancing contrast sensitivity and other visual functions based on objective evaluation, accounting for environmental and task-specific needs.
Implementation Method 1
a first color filter of a first plurality of color filters, each color filter having different spectral transmittance characteristics
Implementation Method 2
a photopic luminous flux, which corresponds to a luminous flux measured under a photopic illuminant
Implementation Method 3
a scotopic luminous flux, which corresponds to a luminous flux measured under a scotopic illuminant
Data Source
Figure 1~4
Figure 5~6
AI summary
The invention relates to a method for selecting a color filter intended to be worn by a subject in order to improve his visual performance for a given visual task to be realized in a given environment. According to the invention, said method comprises the steps of: - submitting said subject to a colored spatio-temporal visual stimulus adapted to evaluate said visual performance for said given visual task, said stimulus being designed so that its chromaticity may be modified; - evaluating the visual performance of the subject based on his visual perception of said visual stimulus, the chromaticity of the visual stimulus taking at least two distinct values, each chromaticity being uniform; and - selecting said color filter based on the results of said evaluation. The invention further proposes an optical article comprising such a color filter. The invention finally provides a system for selecting a color filter using said method.