LED Illumination System Emulating Natural Daylight via Dimcurve Control
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Solution Overview
Problem
Current illumination systems using LED devices struggle to dynamically and automatically emulate natural sunlight conditions throughout the day, failing to smoothly change color temperature and brightness to mimic the sun's position and natural daylight variations.
Innovation Solution
A keypad-controlled LED illumination system that groups devices into zones and scenes, using dimcurves to map color temperature and brightness changes over time, allowing for static and dynamic control of illumination outputs to replicate natural daylight conditions, with options for momentary, persistent, or permanent overrides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LED illumination devices are used to provide adjustable color temperature and brightness, then the ability to emulate different lighting conditions is improved, but the complexity of controlling and synchronizing multiple devices across different zones is worsened
Solution Approach 1:
The illumination system is divided into multiple zones, each containing one or more LED devices that can be independently controlled. Each zone can have its own dimcurve and color temperature profile, allowing localized control while maintaining overall synchronization through the master controller that coordinates zone transitions and timing.
Solution Approach 2:
The system employs a universal control architecture where a master controller manages multiple zones and LED devices through standardized communication protocols. The same control framework applies across different zones, enabling synchronized operation and consistent emulation of natural lighting patterns throughout the entire illumination area.
2Reliability
If the system automatically changes color temperature and brightness to emulate natural sunlight, then the realism of daylight emulation is improved, but the loss of time for manual adjustment and programming is worsened
Solution Approach 1:
The system pre-programmes multiple dimcurves representing different times of day (morning, noon, evening, night) with corresponding color temperature and brightness profiles. These predetermined lighting sequences are automatically executed by the master controller based on clock time, eliminating the need for manual real-time adjustment while maintaining accurate emulation of natural sunlight variations.
Solution Approach 2:
The illumination system operates on periodic cycles, automatically transitioning between pre-defined lighting scenes based on the time of day. The master controller synchronizes LED devices across zones to follow periodic dimcurve patterns that replicate natural daylight progression, from morning sunrise through noon to evening sunset, without requiring continuous manual intervention.
3Measurement precision
If multiple LED devices are controlled to follow different dimcurves for different times of day, then the accuracy of time-based lighting emulation is improved, but the difficulty of detecting and measuring color temperature changes is worsened
Solution Approach 1:
The master controller incorporates feedback mechanisms that continuously monitor the actual color temperature and brightness output of LED devices in each zone. Sensors detect the real-time lighting conditions and provide feedback signals to the controller, which adjusts the drive currents to individual LED devices to maintain precise color temperature accuracy even as ambient conditions change, ensuring accurate time-based emulation while compensating for measurement variations.
Data Source
AI summary
An illumination system and method is provided for readily mapping a plurality of scenes along a dimcurve form a natural show for one or more groups of LED illumination devices. Mapping can be performed using a graphical user interface on a remote controller wirelessly linked to the illumination devices. A keypad is preferably configured for button control of changes to color temperature as a function of brightness along each of the various dimcurves for each of the various groups of illumination devices controlled by a corresponding keypad to allow momentary or persistent override and reprogram of the natural show. Modification to a scene further comprises modifications to scenes before and after the currently modified scene to provide a smoothing dimcurve modification. Global keypad can be used to control multiple zones arranged throughout a structure to switch between a natural show that emulates outdoor sunlight conditions to a panic show when an intruder is detected.