LED Lighting Control for Eye Sensitivity Adaptation
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Solution Overview
Problem
Lighting systems struggle to smoothly transition between different light settings, causing temporary visual discomfort and perceived distortions in color and temperature due to abrupt changes, especially after exposure to colored lights, which can affect observer perception and energy efficiency.
Innovation Solution
A lighting control system that gradually adjusts color saturation, temperature, and intensity of LED panels through transitional settings, using compensation values to minimize perceptible changes and account for nearby light sources, allowing for smooth transitions and energy-saving configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If lighting systems abruptly switch between different light settings, then energy efficiency is improved through direct transitions, but visual comfort deteriorates due to temporary distortions and perceived color/temperature changes
Solution Approach 1:
The system performs preliminary action by introducing transitional light settings before switching to the final target setting. When transitioning from colored light to white light, the system first applies a compensating colored light to counteract the previous colored exposure, allowing eyes to recover sensitivity. This preliminary compensation action prevents the harmful visual distortion that would otherwise occur during abrupt transitions, thereby maintaining both energy efficiency and visual comfort.
2Object-affected harmful factors
If lighting systems use gradual transitions between light settings, then visual comfort is improved, but energy efficiency deteriorates due to extended transition periods
Solution Approach 1:
The system applies parameter changes by dynamically adjusting the color temperature and intensity of transitional light settings based on the specific transition being performed. Rather than using fixed gradual transitions, the system calculates compensating parameters that account for the duration and intensity of previous colored light exposure. This allows for optimized transition parameters that achieve visual comfort while minimizing unnecessary energy consumption during transitions.
3Object-affected harmful factors
If lighting systems account for eye sensitivity changes during transitions, then visual comfort is improved, but system complexity increases due to additional control mechanisms
Solution Approach 1:
The system implements feedback by monitoring the current light setting and duration of exposure to calculate appropriate compensating transitional settings. The controller uses this feedback information about previous colored light exposure to determine the magnitude and duration of compensating light needed. This feedback mechanism enables the system to adapt transitions to actual eye sensitivity changes without requiring complex predictive models or additional sensors, thereby improving visual comfort while controlling system complexity.
Data Source
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AI summary
Techniques are disclosed for manipulating both colored and tunable white lighting systems in order to enhance visual comfort and allow an observer's eyes to recover from exposure to colored light. A lighting system may gradually adjust the color, color temperature , and intensity of various multi-chip LED panels in order to provide pleasant and acceptable changes in light settings. Instead of abruptly switching from one light setting to another, a lighting system may fade to an intermediate transition setting and subsequently fade to the final light setting, allowing an observer's eyes time to adapt to the new light settings. In one example, switching from blue light to a neutral white light may involve a gradual fading from blue light, to a cool white light, and then to a neutral white light, thus allowing the end user's eyes to adapt to the new light settings.