Phosphor-Coated Light Emitter for Sunlight-Like Aquatic Illumination
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Solution Overview
Problem
Current light-emitting devices for aquatic life, such as coral and fish, lack a spectrum that effectively mimics sunlight, particularly in the violet, blue, and yellow regions, which is essential for healthy growth and development.
Innovation Solution
A light-emitting device comprising a semiconductor light emitter emitting violet light, combined with phosphors that convert the light into a spectrum similar to sunlight, including peaks in the violet, blue, and yellow regions, and a gradual decrease in intensity towards the red region, using a specific composition of phosphors and a reflective structure to simulate sunlight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a semiconductor light emitter is used to generate white light for aquatic life, then the light source can be controlled and is suitable for indoor use, but the spectrum does not effectively mimic sunlight particularly in the violet, blue, and yellow regions
Solution Approach 1:
The patent applies parameter changes by carefully selecting and adjusting the emission peak wavelengths of multiple phosphors (yellow phosphor at 560-580nm, blue phosphor at 465-485nm, violet phosphor at 405-425nm) to match the spectral characteristics of sunlight at different water depths. This enables the artificial light source to mimic natural sunlight parameters, thereby improving suitability for aquatic life growth while maintaining controllable indoor operation
Solution Approach 2:
The patent uses composite materials by combining multiple phosphor materials with different emission characteristics (yellow, blue, and violet phosphors) with the semiconductor light emitter. This composite phosphor system works together to generate a composite spectrum that mimics sunlight, resolving the contradiction between controlled artificial lighting and natural spectrum requirements
2Illumination intensity
If multiple phosphors are used to create a sunlight-like spectrum, then the spectrum quality improves for aquatic life growth, but the device complexity increases
Solution Approach 1:
The patent applies local quality by assigning specific functional roles to different phosphor components based on their emission characteristics. Each phosphor (yellow, blue, violet) targets specific wavelength regions required for aquatic life growth, allowing the system to achieve complex spectral quality through specialized local components rather than uniform complexity throughout
Solution Approach 2:
The patent segments the spectrum generation function into multiple independent phosphor components, each responsible for a specific wavelength range. This segmentation allows for modular design and optimization of individual phosphor properties while maintaining overall system functionality, managing complexity through functional decomposition
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 emits a spectrum that is suitable for the growth of aquatic life, mimicking sunlight depth and intensity, promoting healthy growth of coral and other aquatic animals by providing balanced light energy across the visible spectrum.
Implementation Method 1
phosphors that convert the light into a spectrum similar to sunlight, including peaks in the violet, blue, and yellow regions
Implementation Method 2
phosphors absorbing the light from the semiconductor light emitting element and emitting a light with different emission spectrum
Data Source
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AI summary
A light-emitting device includes a light emitter including a light-emitting portion that emits first emission light having a first peak wavelength in a range of 380 to 425 nm and a half width of 15 to 35 nm, and a coating located over the light-emitting portion of the light emitter and containing phosphors to emit second emission light having a second peak wavelength in a range of 430 to 475 nm and having a third peak wavelength in a range of 490 to 540 nm. The light-emitting device emits external emission light having a peak region including the first peak wavelength, the second peak wavelength, and the third peak wavelength 14P02303 and having a long wavelength region defined between an upper end of the range of the third peak wavelength and a wavelength of 750 nm in which a light intensity decreases continuously.