Dynamic Extraocular Filtering for Color Contrast Without Restriction

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Solution Overview

Problem

Current methods to correct color contrast perception in individuals with color vision deficiency restrict the perception of more colors and do not adequately enhance color contrast perception.

Innovation Solution

Dynamic extraocular filtering involves an active filter that dynamically changes the wavelength composition of perceived light by selectively removing specific wavelengths, introducing brightness differences between previously indistinguishable colors, and includes a full spectrum mode to ensure all colors are visible.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If current methods to correct color contrast perception are used, then color contrast perception is improved, but the perception of more colors is restricted

Engineering Contradiction:

Improvecolor contrast perceptionVSAvoidcolor perception range

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The patent applies dynamics by using a dynamically adjustable filter that can switch between different filter conditions (first filter condition for enhancing color contrast and second filter condition for maintaining full color spectrum). This allows the system to adapt its filtering characteristics based on the observer's needs, resolving the contradiction between improving color contrast perception and maintaining broad color perception range.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of wavelength transmission by selectively removing specific wavelengths (e.g., red or green wavelengths) under the first filter condition to enhance color contrast, while allowing full spectrum transmission under the second filter condition. This parameter change enables the system to improve color contrast perception without permanently restricting color perception range.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If selective wavelength removal is applied to improve color contrast, then brightness difference between colors is enhanced, but certain colors become less visible

Engineering Contradiction:

Improvecolor contrast perceptionVSAvoidcolor visibility

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The system dynamically switches between filter conditions: when the first filter condition is active, selective wavelength removal enhances color contrast; when the second filter condition is active, full spectrum transmission ensures all colors remain visible. This dynamic adaptation resolves the contradiction between enhancing color contrast and maintaining color visibility.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The filter conditions are changed at high frequencies that are imperceptible to the human eye, creating a periodic action that maintains the appearance of a white filter while still providing the benefits of selective wavelength removal for color contrast enhancement.

Inventive Principle:

Principle #19Periodic action

3Measurement precision

If high frequency filter changes are used to maintain normal appearance, then color contrast improvement is preserved, but filter complexity increases

Engineering Contradiction:

Improvecolor contrast perceptionVSAvoidfilter control system

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent changes the parameter of filter transmission characteristics at high frequencies, creating an effective white filter appearance while maintaining the ability to selectively remove wavelengths for color contrast enhancement. This parameter change approach allows the system to achieve color contrast improvement without requiring complex visible filter mechanisms.

Inventive Principle:

Principle #35Parameter changes

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

Improves color contrast perception for color vision deficient individuals by allowing differentiation between chromatic hues without restricting any colors, maintaining normal vision integrity.

Implementation Method 1

In each filter condition, by selectively removing wavelengths of incoming spectra, a brightness difference is introduced between previously indistinguishable colors

Methodology Applied

Scientific EffectOptical filtering: Filter (optical)

Data Source

PatentUS20250284142A1Dynamic extraocular filtering for correction of color contrast perception

Publication Date: 2025.09.11 MAMCHIK VLADIMIR

AI summary

Dynamic extraocular filtering is a correction method to improve color contrast recognition in color vision deficient observers (non-normal color vision). This method is based on actively controlling wavelength spectrum transmission to retinal photoreceptors, introducing a temporal contrast that is interpreted as color contrast by the observer. The method functions by utilizing an active filter that produces several filter conditions which change at a high frequency. This method changes filter conditions dynamically as opposed to current systems which rely on static band-stop filters.