Surface-Mount LED With Fluorescent Lens for Plant Light
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Solution Overview
Problem
Conventional light emitting devices for plant cultivation require a large area due to the two-dimensional arrangement of blue and red LEDs, leading to unsatisfactory color mixture and uneven intensity of composite light, which affects the photosynthetic photon flux ratio.
Innovation Solution
A light emitting device with a surface-mounted LED chip configuration that includes a lens section and a frame, using a single type of LED chip emitting blue light and a fluorescent material to produce red light, ensuring a satisfactory color mixture and reduced area usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If blue LEDs and red LEDs are two-dimensionally arranged on a substrate, then the light source can provide both blue and red light for plant cultivation, but the area occupied by the light source increases
Solution Approach 1:
The patent combines blue LED chips and red fluorescent material into a single integrated light emitting section. The blue LED chips emit blue light that directly provides blue spectrum coverage, while also exciting the red fluorescent material to emit red light. This merging of multiple light sources into one compact unit reduces the overall area required while maintaining both blue and red light output for plant cultivation
Solution Approach 2:
The patent introduces a fluorescent material as an intermediary that converts blue light from LED chips into red light. The fluorescent material is positioned adjacent to the blue LED chips on the same substrate, where it absorbs blue light photons and re-emits red light photons. This intermediary mechanism enables red light generation without requiring separate red LED chips, thereby reducing the total light source area while providing both blue and red spectrum coverage
2Adaptability or versatility
If blue LEDs and red LEDs are two-dimensionally arranged on a substrate, then both blue and red light can be emitted, but the color mixture becomes unsatisfactory and uneven
Solution Approach 1:
The patent merges blue LED chips and red fluorescent material into a closely integrated light emitting section where both light sources are positioned in immediate proximity. This close integration ensures that blue light and red light are emitted from the same location, creating uniform color mixture and eliminating the unevenness that occurs when blue and red LEDs are separated by large distances on a substrate
Solution Approach 2:
The patent applies local quality by concentrating both blue light emission (from LED chips) and red light emission (from fluorescent material) within the same localized light emitting section. This localized combination ensures that every point in the light output region receives a consistent mixture of blue and red wavelengths, providing uniform spectral quality across the entire illumination area rather than creating spatial variations in color composition
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 solution achieves a compact design with improved color mixture and increased brightness, effectively maintaining a predetermined photosynthetic photon flux ratio, enhancing plant growth without the need for separate blue and red LEDs.
Implementation Method 1
a fluorescent material, which absorbs blue light so as to emit red light
Data Source
AI summary
A light emitting device (1) includes (i) a surface-mounted light emitting section (10a), (ii) a lens section (30) which is provided on a light exit side of the surface-mount light emitting section (10a), and (iii) a frame section (40) which fixes a periphery of the lens section (30). In the surface-mounted light emitting section (10a), a resin layer (17) that contains a red fluorescent material (17b) covers at least one (1) blue LED chip (14a). This allows the surface-mounted light emitting section (10a) to emit (i) light that matches a peak wavelength which falls within a short wavelength range and (ii) light that matches a peak wavelength which falls within a long wavelength range.