Solid State Lighting for CMYK Ink Vibrancy
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Solution Overview
Problem
Conventional lighting devices struggle to accurately and efficiently illuminate printed materials with CMY or CMYK inks, often resulting in muted colors due to imperfect ink interactions and limited color gamut, especially when compared to natural light sources.
Innovation Solution
The use of solid state light emitters with multiple peak wavelengths, specifically configured to enhance ink reflectance by increasing energy at visibly reflective wavelengths and reducing energy at less sensitive wavelengths, providing a higher luminous flux and efficacy while improving vibrancy and color accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional lighting devices use broad-spectrum light sources to illuminate printed materials, then illumination intensity is sufficient, but color vibrancy and accuracy deteriorate due to imperfect ink interactions and limited color gamut
Solution Approach 1:
The patent segments the broad-spectrum light source into multiple discrete wavelength components using individual LED emitters at specific peak wavelengths (e.g., 450nm blue, 530nm green, 630nm red). Each wavelength target is addressed by a dedicated emitter, allowing precise control over the spectral composition to match ink reflectance characteristics while maintaining high brightness.
Solution Approach 2:
The patent applies local quality by tailoring the spectral distribution to specific regions of the visible spectrum where printed inks reflect light most effectively. Rather than uniform illumination, the lighting device concentrates energy at wavelengths that maximize color vibrancy and accuracy for CMYK printed materials, creating non-uniform spectral quality optimized for the target object.
2Illumination intensity
If conventional lighting devices increase illumination intensity to improve visibility, then brightness is enhanced, but energy efficiency deteriorates due to excessive energy consumption
Solution Approach 1:
The patent extracts only the specific wavelength components that are most effective for illuminating printed materials, eliminating unnecessary broad-spectrum radiation. By using individual LED emitters at peak wavelengths matched to ink reflectance, the system delivers high luminous flux while consuming less energy by excluding wavelengths that do not contribute to color perception.
Solution Approach 2:
The patent changes the spectral parameter distribution from a continuous broad spectrum to a discrete multi-line spectrum with peaks at specific wavelengths (450nm, 530nm, 630nm, etc.). This parameter transformation allows the lighting device to achieve high luminous flux with reduced power consumption by concentrating energy only where it is most effective for the intended application.
3Device complexity
If conventional lighting devices use traditional broad-spectrum sources, then device complexity is low, but color gamut and vibrancy deteriorate
Solution Approach 1:
The patent segments the lighting function into multiple independent LED emitter units, each responsible for a specific wavelength range. This segmentation enables precise spectral control and expanded color gamut while maintaining manageable device complexity through modular architecture, where each emitter can be independently controlled and optimized.
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
This configuration significantly enhances the vibrancy and brightness of illuminated printed materials by optimizing light emission to match the reflectance properties of CMY or CMYK inks, resulting in improved color rendition and energy efficiency.
Implementation Method 1
a first electrically activated solid state light emitter arranged to generate first emissions comprising a first peak wavelength, and at least one second electrically activated solid state light emitter arranged to generate second emissions comprising a second peak wavelength
Implementation Method 2
at least one first solid state light emitter comprises a blue solid state light emitter arranged to stimulate emissions of a lumiphoric material arranged to produce lumiphor emissions in a green or yellow-green range
Data Source
AI summary
Combinations of solid state light emitters, optionally arranged to stimulate one or more lumiphoric materials, are used to illuminate surfaces (e.g., upright surfaces) including printed material produced with CMY or CMYK inks. Vibrancy and/or efficacy may be enhanced by increasing the effective steepness of printed ink reflectance wavelength boundaries by illuminating printed material with solid state light emitters of multiple colors having tailored boundaries (e.g., increased separation between colors and/or increased energy in spectral areas highly reflected by CMY inks, or reducing energy of emissions at wavelengths to which the human eye is less sensitive). Lighting devices may include multiple operating modes having different gamut properties (e.g., relative gamut values). One or more subregions of an upright surface bearing printed material may be preferentially illuminated with an array of solid state light emitters including multiple emitters having different peak wavelengths.