LED Lighting Device Rail Reflector Illuminance Uniformity
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Solution Overview
Problem
LED lighting in plant cultivation systems experiences non-uniform illuminance distribution due to strong directivity, leading to uneven plant growth, and existing solutions like diffusion plates result in power efficiency loss and increased operational costs.
Innovation Solution
An LED lighting device with a substrate, a single rail-shaped first reflector, and pair of rail-shaped second reflectors that distribute light evenly across the illumination area, avoiding the need for diffusion plates and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LED elements are used as light sources, then power consumption is reduced and lifespan is extended, but illuminance distribution becomes non-uniform due to strong directivity
Solution Approach 1:
The illumination system is segmented into multiple LED elements arranged in specific patterns (e.g., alternating on/off sequences) to distribute light more evenly across the illumination area, preventing the non-uniformity caused by single-directional LED beams
Solution Approach 2:
The system dynamically controls LED elements by sequentially turning them on and off in different patterns, creating temporal variation in light distribution that results in uniform average illuminance across the entire cultivation area
2Illumination intensity
If diffusion plates are used to equalize illuminance distribution, then illuminance uniformity is improved, but power efficiency is reduced due to light attenuation
Solution Approach 1:
The invention extracts and eliminates the diffusion plate component from the system, replacing it with direct spatial and temporal control of LED elements to achieve uniform illuminance distribution without the energy loss associated with light diffusion
Solution Approach 2:
The mechanical/optical diffusion plate is replaced with an electronic control system that manages LED activation sequences, substituting passive light diffusion with active temporal-spatial light distribution control
3Illumination intensity
If diffusion plates are used to equalize illuminance distribution, then illuminance uniformity is improved, but operational cost increases due to additional components
Solution Approach 1:
The diffusion plate component is completely removed from the system, reducing operational costs associated with purchasing, installing, and maintaining additional optical components while achieving the same uniformity goal through LED control
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 uniform illuminance distribution, reducing operational costs by minimizing light loss and allowing for more efficient LED light usage without the need for additional diffusion plates, thereby promoting consistent plant growth.
Implementation Method 1
a first reflector formed in a single rail shape on the surface of the substrate; and a pair of rail-shaped second reflectors formed on the surface of the substrate in such a manner that the plural LED elements and the first reflector are interposed between the pair of second reflectors
Data Source
AI summary
An LED lighting device 10 includes: a substrate 15 formed in an elongated shape; a first reflector 11 formed in a single rail shape on the surface of the substrate 15; plural LED elements 16 (16a and 16b) arranged in rows at positions on both sides of the first reflector 11 on the surface of the substrate 15; and a pair of rail-shaped second reflectors 12 (12a and 12b) formed on the surface of the substrate 15 in such a manner that the LED elements 16 (16a and 16b) and the first reflector 11 are interposed between the pair of second reflectors 12a and 12b.