Screen System for Body Color Simulation Using Subtractive Mixing
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Solution Overview
Problem
Current printing technologies face challenges in accurately simulating body colors, particularly for printing on various substrates, as existing solutions fail to reproduce fluorescent, lacquer, metallic, and spot colors, and cannot account for the influence of substrates like fabric, metal, or glass on color effects, leading to color deviations across different devices and locations.
Innovation Solution
A screen system using subtractive color mixing with a white light source and reflective color filters that mimic the behavior of printing inks on substrates, allowing for the selection of primary colors and their sequence, and enabling the simulation of mixed tones and halftone dots with adjustable brightness and angle, thereby replicating the color effects of printed materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If additive color mixing with self-luminous colors is used, then the color brilliance is improved, but the accuracy in representing body colors and print results deteriorates
Solution Approach 1:
The patent inverts the conventional approach by using subtractive color mixing instead of additive color mixing. The screen system uses color filters that subtract specific wavelengths from white light to create primary colors (cyan, magenta, yellow), mimicking how printing inks work, rather than adding self-luminous colors together. This inversion allows the screen to accurately represent body colors and print results while maintaining adequate brightness through the use of a white light source and reflective display technology.
2Device complexity
If conventional screen color spaces are used, then the device complexity is reduced, but the ability to represent spot colors and special effects deteriorates
Solution Approach 1:
The patent changes the fundamental parameters of the color system by implementing subtractive color mixing with cyan, magenta, and yellow primary colors instead of the conventional RGB additive system. This parameter change enables the screen to represent spot colors, metallic effects, fluorescent colors, and other special print effects that cannot be reproduced with standard RGB displays, while maintaining reasonable device complexity through the use of off-the-shelf components like LCD panels and LED backlights combined with color filtering layers.
3Manufacturing precision
If proofs are printed on production presses, then the color accuracy is improved, but the productivity and cost efficiency deteriorates
Solution Approach 1:
The patent creates a visual copy of the print output on a screen display that accurately reproduces the colors and effects of the printed material. The subtractive color mixing system with CMYK-based color filters mimics the optical properties of printing inks on various substrates, allowing users to view a screen-based proof that closely resembles the final printed product without needing to physically print test samples on the production press, thereby significantly improving productivity and reducing costs.
4Adaptability or versatility
If multiple printing units are used to expand color space, then the color representation capability is improved, but the device complexity and cost increase
Solution Approach 1:
The patent introduces a color management intermediary layer that translates between standard RGB digital images and the subtractive CMYK color space used by the screen display. This intermediary color processing system, including color profiles and conversion algorithms, enables the accurate representation of spot colors and special effects without physically adding multiple printing units to the display device, thus expanding color space capability while avoiding the complexity and cost of multi-unit printing systems.
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 solution ensures accurate and consistent representation of body colors across different screen systems and locations, reducing color deviations and enabling the simulation of complex color effects, including metallic and fluorescent colors, by mimicking the behavior of printing inks on various substrates.
Implementation Method 1
Body colors absorb spectral components from the white light spectrum. The hue perceived by the viewer's eye consists of the non-absorbed spectral components that are either reflected (opaque body) or transmitted (transparent body).
Implementation Method 2
If body colors are mixed together, each individual body color subtracts its spectral component. The spectrum of the mixed color is therefore narrower than the spectra of the individual body colors.
Data Source
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AI summary
The invention relates to a device for the representation of body colours for the purpose of simulation of printing results with a screen, comprising at least one light source and a projection surface. According to the invention, the base colours are generated from white light by filtering body colours and the mixed colours generated by subtractive colour mixing, preferably by means of a reflective colour filter. By means of said method for representation of body colours for the purpose of simulation of printed results, the possibility of representation of body colours in various locations and at various times in identical form is achieved.