Dynamic Lighting Scenario Generation Using Solid-State Emitters
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Solution Overview
Problem
Existing lighting systems fail to accurately replicate dynamic natural light conditions, particularly in terms of transitioning between different spectra and simulating diurnal illumination cycles, which can impact plant growth and productivity.
Innovation Solution
A method and system using solid-state light emitters that provide a dynamic lighting scenario by determining sets of reference control parameters based on calibration data, allowing for transition illumination between reference points, and driving the emitters to generate a dynamic lighting scenario that mimics natural light conditions over a timeline, including adjustments based on weather forecasts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a multi-LED system is used to reproduce natural light spectra, then the spectral characteristics can be matched, but the system cannot accurately transition between different spectra or simulate dynamic diurnal illumination cycles
Solution Approach 1:
The patent applies dynamics by implementing a control system that dynamically adjusts LED operating parameters (current, pulse width modulation) to transition between different spectral states. The system moves from static spectral reproduction to dynamic spectral simulation, enabling accurate representation of diurnal illumination cycles and weather-dependent spectral variations through time-varying control strategies.
2Adaptability or versatility
If blue LEDs are added to control circadian rhythm, then the spectrum can be adjusted for specific plant responses, but the transition between spectra and overall dynamic control is not addressed
Solution Approach 1:
The patent segments the spectral control into multiple independent LED channels (including blue LEDs for circadian rhythm control) and implements hierarchical control. Each LED channel can be independently adjusted while the overall system coordinates transitions between spectral states, managing complexity through modular channel control rather than monolithic system control.
Solution Approach 2:
The control system pre-defines spectral target states corresponding to different times of day and weather conditions. By preparing these reference spectral states in advance, the system simplifies real-time control by transitioning between predetermined targets rather than calculating optimal spectral compositions dynamically, reducing computational complexity during operation.
3Productivity
If natural light conditions are replicated at different geographical locations and times, then plant growth can be optimized, but the system lacks the capability to simulate subtle spectral variations and transitions
Solution Approach 1:
The patent implements feedback mechanisms where spectral sensors measure the actual output of the LED system and compare it against target spectral profiles for different geographical locations and times of day. The control system uses this feedback to adjust LED driving parameters, ensuring accurate spectral reproduction that captures subtle variations in natural light conditions across different environments and times.
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 system effectively replicates nuanced natural light conditions, enhancing the adaptability and accuracy of light reproduction, thereby improving plant growth and productivity by simulating actual outdoor light experiences.
Implementation Method 1
LED-based lighting system reproducing natural light
Implementation Method 2
controlling an illumination unit including multiple solid-state light emitters
Data Source
AI summary
Methods and systems are provided for generating a dynamic lighting scenario over a scenario timeline using solid-state light emitters. The method can include a step of providing a plurality of lighting reference points in the dynamic lighting scenario, each lighting reference point having an associated reference illumination state to be achieved at a corresponding reference moment of the scenario timeline. The method can also include a step of determining a plurality of sets of reference control parameters for the solid-state light emitters, each set of reference control parameters for producing the reference illumination state associated to a corresponding one of the plurality of lighting reference points. The method can also include driving the solid-state light emitters based on the plurality of reference control parameters to generate the dynamic lighting scenario.