Multi-LED Lighting Device for Distinct Colored Shadows
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Solution Overview
Problem
Existing lighting devices fail to create a unique space by producing shadows with different hues when illuminating an exhibit with monochromatic light, as they lack the capability to effectively project and interfere spot lights of varying colors.
Innovation Solution
A lighting device with multiple light projection means, such as LEDs, positioned 5 cm or more apart, which project spot lights that interfere with each other to create shadows of different hues when illuminated with a monochromatic light, achieved by adjusting light quantity and angle to ensure clear, matching contours and hues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple light projection means are arranged closely together, then the device complexity is reduced and manufacturing is easier, but the ability to produce distinct multi-hued shadows is compromised
Solution Approach 1:
The lighting device segments the light source into multiple independent light projection means (LEDs), each capable of emitting monochromatic light of different wavelengths. These segmented light sources are positioned to project overlapping spot lights that create distinct colored shadows, resolving the contradiction by maintaining structural simplicity while achieving complex visual effects through functional segmentation.
Solution Approach 2:
Each light projection means is assigned a specific local quality - a particular monochromatic wavelength - allowing different regions of the lighting device to contribute different color characteristics. This local differentiation enables the production of multi-hued shadows while maintaining overall device simplicity.
2Illumination intensity
If light projection means are positioned 5 cm or more apart to create distinct shadows, then shadow hue distinctness is improved, but the device area and manufacturing complexity increase
Solution Approach 1:
The lighting device employs a nested arrangement where multiple light projection means are positioned within a compact hierarchical structure. The light sources are nested at different spatial levels and angles, allowing them to be positioned 5 cm or more apart for distinct shadow production while maintaining a small overall device footprint through efficient spatial nesting.
Solution Approach 2:
The patent resolves the area contradiction by transitioning from a two-dimensional planar arrangement to a three-dimensional spatial configuration. Light projection means are positioned at different heights, angles, and depths, allowing sufficient separation distance for distinct shadow hues while maintaining a compact overall device area through vertical and angular dimensionality.
3Illumination intensity
If spot lights are projected to overlap and interfere with each other, then multi-hued shadow effects are enhanced, but control precision and alignment requirements increase
Solution Approach 1:
The patent employs parameter changes in the form of colored filters or wavelength-selective elements associated with each light projection means. By changing the wavelength parameter of each light source to specific monochromatic values, the system achieves distinct colored shadows through spectral differentiation rather than relying solely on precise geometric alignment, thereby reducing manufacturing precision requirements.
4Illumination intensity
If multiple types of lights are irradiated simultaneously, then the visual space is enhanced, but color unevenness and control complexity increase
Solution Approach 1:
The patent extracts and eliminates the problematic white light component that causes color unevenness. Instead of using broad-spectrum white light sources, the invention extracts only the necessary monochromatic wavelength components through individual LED sources or filters, achieving enhanced visual space with improved color uniformity by taking out the unwanted spectral components.
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 device produces a unique space with clearly visible shadows of different hues when an exhibit is illuminated, enhancing the visual impact by creating a monochromatic light with varying RGB color differences within a range of 0% to 35% and low saturation.
Implementation Method 1
spot lights to be respectively irradiated from the light projection means interfere with each other
Implementation Method 2
two or more shadows having different hues appear from the exhibit or the like
Data Source
AI summary
To provide a lighting device capable of producing a more unique space, and particularly to provide a lighting device in which, when an exhibit or the like (an article) is arranged in portions where spot lights to be respectively irradiated from light projection means interfere with each other, two or more shadows having different hues appear from the exhibit or the like (the article) while the exhibit or the like (the article) is being illuminated with a monochromatic light, the lighting device has a function of irradiating respective spot lights in two or more colors, and includes two or more light projection means for respectively irradiating the spot lights, in which the light projection means are respectively provided at positions spaced 5 cm or more apart from each other, and the spot lights to be irradiated from the light projection means respectively include portions that interfere with each other.