Adaptive Lighting System for Spectral Control
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Solution Overview
Problem
Conventional lighting systems in environments like shops and museums often fail to provide adequate control over lighting, leading to undesirable effects such as discoloration of light-sensitive articles and distraction from switching lights on and off, which can deter viewers and waste resources.
Innovation Solution
An adaptive lighting system that adjusts light spectrum based on the presence or absence of a viewer within a detection zone, using a controller to switch between a lower power 'first spectrum' and a higher power 'second spectrum' to maintain illumination while minimizing discoloration and distraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If lighting is continuously switched on to provide attractive illumination, then the article presentation is improved, but the article deteriorates or discolors more quickly
Solution Approach 1:
The lighting system dynamically adjusts the spectral power distribution based on viewer presence. When a viewer is detected, the system transitions to a first spectral mode with higher power in wavelengths that enhance article appearance. When no viewer is present, it switches to a second spectral mode with reduced power in those same wavelengths, thereby minimizing discoloration while maintaining illumination when needed.
Solution Approach 2:
The system changes the spectral parameters of the light source according to viewer presence. By adjusting the spectral power distribution - specifically reducing power in certain wavelength intervals when viewers are absent - the system resolves the contradiction between providing attractive illumination and preventing article deterioration.
2Loss of energy
If lighting is switched off when no viewers are present to reduce discoloration, then energy consumption is reduced, but the space appears dark and uninviting
Solution Approach 1:
Instead of completely switching off the lighting, the system changes the spectral parameters to a second mode with reduced power output. This maintains sufficient ambient illumination to keep the space inviting while consuming less energy and reducing discoloration when no viewers are present.
3Loss of energy
If lighting is switched on and off based on viewer presence, then energy is saved, but the switching appears disturbing to people in adjacent spaces
Solution Approach 1:
The system avoids abrupt on/off switching by transitioning between two spectral modes. Both modes provide sufficient illumination, but the second mode operates at lower power when viewers are absent. This gradual parameter transition prevents noticeable disturbances to people in adjacent spaces while still achieving energy savings.
Data Source
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AI summary
According to an aspect of the present inventive concept, this and other objects are achieved by a lighting system (100) for illuminating an article (112) comprising: a lighting device (102) arranged to emit light (103) towards the article (112), wherein a spectrum of the emitted light (103) is controllable. The lighting system (100) further comprises a controller (104) configured to control the lighting device (102) responsive to detection of presence or movement of an object (110) within a detection zone (108) associated with the article (112). The controller (104) is configured to: control the lighting device (102) to emit light (103) having a first spectrum in response to absence of an object (110) or movement of an object (110) within the detection zone (108), and control the lighting device (102) to emit light having a second spectrum in response to presence of an object (110) or movement of an object (110) within the detection zone (108). The light having the first spectrum presents, in at least one wavelength interval, a lower power than the light having the second spectrum. Moreover the light having the first spectrum and the light having the second spectrum provide a corresponding level of illumination of the article (112).