Beam-Shaping Lighting Control for Circadian Color and Lux
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Solution Overview
Problem
Existing lighting systems fail to effectively control visible-light emissions for improving circadian rhythms by combining factors such as color points, melanopic lux, beam widths, beam directions, light intensities, and circadian luminance.
Innovation Solution
A lighting system comprising a visible-light source with semiconductor devices, an optical system, a mounting system, and a control system that allows for selectable color points, beam widths, and directions, promoting high melanopic lux during the day and low melanopic lux at night through lateral or up-light emissions and down-light emissions respectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If lighting systems use fixed color temperature and beam width, then device complexity is reduced, but adaptability to different circadian requirements deteriorates
Solution Approach 1:
The lighting system dynamically adjusts color temperature and beam width based on time of day and circadian requirements. The control system varies these parameters between daytime (cool white, wider beam) and nighttime (warm white, narrower beam) configurations, making the system adaptive without requiring multiple fixed devices
Solution Approach 2:
The lighting system performs multiple functions by combining adjustable color temperature control with variable beam width control in a single device. This allows one lighting system to serve both daytime circadian stimulation needs and nighttime relaxation needs, replacing what would traditionally require multiple specialized lighting devices
2Reliability
If lighting systems provide high melanopic lux during daytime, then circadian rhythm regulation is improved, but energy consumption increases
Solution Approach 1:
The lighting system implements periodic action by switching between daytime configuration (high melanopic lux for circadian stimulation) and nighttime configuration (low melanopic lux for relaxation). The control system activates high-energy cool white light during daytime hours and transitions to low-energy warm white light during nighttime, matching circadian rhythm patterns
Solution Approach 2:
The system changes physical parameters (color temperature, beam width, intensity) based on temporal requirements. During daytime, it uses cool white light with wider beam width for maximum circadian effectiveness; during nighttime, it transitions to warm white with narrower beam width, reducing energy consumption while maintaining circadian appropriateness
3Object-affected harmful factors
If lighting systems use narrow beam width at nighttime, then light pollution and disturbance are reduced, but illumination coverage area decreases
Solution Approach 1:
The lighting system applies local quality by using narrow beam width specifically during nighttime hours when the goal is to concentrate light on immediate tasks while minimizing spill light. During daytime, it switches to wider beam width for broader coverage, as circadian stimulation benefits from more diffuse light distribution
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 enhances circadian rhythm regulation by adjusting light emissions to meet specific circadian requirements, improving user comfort and well-being.
Implementation Method 1
The visible-light source includes a plurality of semiconductor light-emitting devices
Data Source
AI summary
Lighting system having visible-light source including semiconductor light-emitting devices arranged for generating plurality of visible-light emissions having range of color points including cool to very cool white color point for daytime and warm to very warm white color point for nighttime. Optical system arranged for causing some visible-light emissions to have range of beam widths including relatively wide and narrow beam widths. Mounting system causing range of beam directions. Control system causing visible-light emissions to include daytime configuration having cool to very cool white color point and relatively wide beam width, and nighttime configuration having warm to very warm white color point and relatively narrow beam width. Daytime configuration includes control system for causing visible-light emissions to include lateral- or up-light emissions, promoting relatively high equivalent melanopic lux. Nighttime configuration includes control system for causing visible-light emissions to include down-light emissions promoting relatively low equivalent melanopic lux.