Task Lamp With Circadian Stimulation for Office Entrainment
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Solution Overview
Problem
Indoor lighting in office spaces, particularly in open offices with few walls, fails to provide adequate blue-enriched light for circadian entrainment, despite recommendations like the WELL Building Standard, leading to insufficient health support for users.
Innovation Solution
A task lamp with a user-facing light emitting surface for circadian stimulation (CS) light, combined with a work light source, offering multiple modes to enhance circadian entrainment and meet vertical EML requirements, including adjustable brightness and color temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional LED task lamps minimize the profile of the lamp head to approximate a plane light emitting onto the work plane, then the lamp achieves a sleek design and close-to-work-plane illumination, but the lamp cannot provide adequate circadian stimulation to the user
Solution Approach 1:
The lamp is divided into functionally independent light sources: a work light source for illuminating the work surface and a circadian stimulation light source for providing blue-enriched light to the user. This segmentation allows each light source to be optimized for its specific function without compromising the other, resolving the contradiction between sleek design and circadian effectiveness.
Solution Approach 2:
The patent combines multiple light sources with different functions into a single integrated lamp unit. The work light source and circadian stimulation light source are merged in one device, allowing the lamp to simultaneously provide task illumination and circadian entrainment, thereby eliminating the need for separate devices while maintaining a compact form factor.
2Illumination intensity
If general lighting systems provide the same level of illumination everywhere, then all areas receive adequate lighting, but energy is wasted in areas that do not require high illumination levels
Solution Approach 1:
The lighting system provides different illumination levels to different spatial zones: general lighting areas receive lower illumination (150 lux) while task work surfaces receive higher illumination (500 lux). This local differentiation ensures that energy is not wasted in areas that do not require high light levels, while still providing adequate illumination where needed.
Solution Approach 2:
The lighting system is segmented into general lighting zones and task lighting zones, each with independently controlled illumination levels. This allows the system to optimize energy consumption by providing appropriate light levels only where required, rather than uniformly illuminating the entire space at high intensity.
3Illumination intensity
If indoor lighting provides adequate brightness for work tasks, then work surfaces are well illuminated, but the blue content is insufficient for circadian entrainment
Solution Approach 1:
The lighting system separates the function of task illumination from circadian stimulation by using distinct light sources. The work light source provides adequate brightness for work surfaces, while the circadian stimulation light source specifically targets the user with blue-enriched light to support circadian entrainment, thereby resolving the contradiction between task lighting adequacy and circadian health support.
Solution Approach 2:
The circadian stimulation light source uses specific spectral parameters (blue-enriched spectrum with 275 EML) that are different from the work light source. By changing the spectral composition rather than just the intensity, the system provides both adequate work surface illumination and sufficient blue light content for circadian entrainment simultaneously.
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 task lamp effectively supports circadian entrainment by providing personalized, energy-efficient lighting that meets WELL Building Standard requirements, enhancing user comfort and health through adjustable CS light modes.
Implementation Method 1
a circadian stimulation (CS) light source having a light emitting surface for emitting CS light
Data Source
AI summary
A lamp comprising: (a) a work light source configured to emit work light downward to illuminate a work surface; (b) a circadian stimulation (CS) light source having a light emitting surface for emitting CS light in at least a first mode normal to said work light, CS light in said first mode having a first EML and a first brightness sufficient to cause circadian entrainment in a user.