Dynamic Illumination Source for Perceived Color Manipulation
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Solution Overview
Problem
The human eye and other color sensors cannot distinguish between different spectral compositions of light that have the same chromaticity, leading to challenges in manipulating the perceived color of materials, especially under conventional high Color Rendering Index (CRI) lighting sources, where materials with 'peaky' Transmission, Reflection, and Fluorescence spectra appear unchanged.
Innovation Solution
A system that uses an illumination source with multiple states of wavelength and amplitude configurations, controlled by a device to switch between these states, allowing for gradual changes in spectral composition while maintaining constant luminosity, thereby altering the perceived chromaticity of a target material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional high CRI lighting sources are used to illuminate materials, then the materials appear with their inherent bulk color, but the ability to manipulate perceived material color is lost
Solution Approach 1:
The lighting system dynamically switches between multiple spectral compositions (first plurality and second plurality of wavelengths) to alter the perceived chromaticity of materials. The illumination source transitions from a static high CRI state to a dynamic state where spectral content can be changed on demand, enabling color manipulation while maintaining accurate color rendering when needed.
Solution Approach 2:
The system changes the spectral parameters of the illumination source by switching between different wavelength combinations. By adjusting which wavelengths are emitted (first plurality vs. second plurality), the system modifies how materials reflect and absorb light, thereby changing their perceived chromaticity while preserving the ability to render inherent colors accurately.
2Adaptability or versatility
If the spectral composition of illumination is changed to alter material color appearance, then perceived chromaticity changes, but the illumination source complexity increases
Solution Approach 1:
The illumination source is segmented into multiple independent wavelength components (first plurality and second plurality of wavelengths). Each wavelength group can be independently controlled and switched, allowing the system to create different spectral compositions by combining or excluding specific wavelength segments, thereby simplifying the control of complex spectral changes.
Solution Approach 2:
The illumination source is designed to perform multiple functions: it can emit the first plurality of wavelengths for accurate color rendering and the second plurality of wavelengths for color manipulation. This multi-functional design allows a single device to serve both high CRI lighting and perceived chromaticity alteration purposes, reducing overall system complexity.
3Measurement precision
If multiple wavelength states are used to manipulate material color, then color perception control improves, but the switching control mechanism becomes more complex
Solution Approach 1:
The system employs periodic switching between the first and second plurality of wavelength states. The control device provides switch signals that periodically alternate the illumination source between different spectral compositions, enabling precise control over perceived chromaticity through timed transitions rather than continuous complex adjustment mechanisms.
Solution Approach 2:
A control device acts as an intermediary between the user/input signals and the illumination source. This intermediary receives switch signals and translates them into appropriate wavelength state changes, simplifying the control mechanism by providing a dedicated interface that manages the complexity of switching between multiple wavelength configurations.
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
Enables the manipulation of perceived material color by varying the spectral composition of illumination, effectively changing the chromaticity perceived by an observer, even under conventional lighting conditions, as demonstrated by examples such as turning bastnaesite from brown to green.
Implementation Method 1
the illumination source includes a plurality of light emitting diodes
Implementation Method 2
Many materials exhibit Transmission, Reflection, Absorption, and Fluorescence spectra
Implementation Method 3
Many materials exhibit Transmission, Reflection, Absorption, and Fluorescence spectra
Data Source
AI summary
A method and apparatus to manipulate a perceived target material color by varying compositions of illumination with static perceived chromaticity is disclosed. An illumination source is configured to emit light at a first set of wavelengths with a first set of amplitudes to illuminate the target material. An observer perceives the emitted light to be at a predetermined chromaticity, and perceives light reflected from the illuminated target material to be at a first chromaticity. A control device switches the illumination source to emit light at a second plurality of wavelengths at a second plurality of amplitudes, which is perceived to the observer to be of the same predetermined chromaticity as before, while the light reflected from the illuminated target material is perceived to be of a different chromaticity.