Aircraft Lighting Control Adapts to Time Zones
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Solution Overview
Problem
Long-haul flights across time zones cause jetlag due to disruption of the human biological clock, as existing lighting solutions lack a systematic approach to simulate natural daylight phases and adapt to time zone changes.
Innovation Solution
A method for creating a light program that simulates daylight phases by controlling interior aircraft lighting based on flight parameters, using a sequence list of phases with proportional durations, scaling to match flight duration, and adjusting lighting data for specific activities and moods to mimic natural daylight conditions, thereby aiding the adaptation of the human biological clock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing lighting solutions are used in aircraft, then basic illumination is provided, but they fail to systematically simulate natural daylight phases and adapt to time zone changes, resulting in ineffective jetlag reduction
Solution Approach 1:
The lighting control system divides the 24-hour day into multiple phases (morning, daytime, evening, night) with distinct lighting characteristics. Each phase has predefined lighting data including color temperature and intensity ranges, allowing the system to systematically transition through different lighting states to simulate natural daylight cycles and adapt to time zone changes during flights
Solution Approach 2:
The lighting system dynamically adjusts illumination parameters based on the current flight phase and destination time zone. The controller modifies color temperature and intensity in real-time according to the simulated daylight phase, enabling the system to adapt to different time zones while maintaining a systematic control structure that manages the complexity of these dynamic adjustments
2Ease of operation
If manual lighting control is used by flight crew, then flexibility in adjusting lighting is achieved, but systematic simulation of natural daylight phases is lost and jetlag reduction effectiveness decreases
Solution Approach 1:
The lighting control system operates autonomously by automatically determining the current flight phase based on flight data (departure time, destination, duration) and selecting appropriate lighting parameters from predefined phase sequences. The controller independently adjusts color temperature and intensity without requiring manual intervention, ensuring consistent application of the light program while maintaining ease of operation through automated decision-making
3Adaptability or versatility
If uniform lighting is provided throughout the flight, then simplicity of lighting system is maintained, but inability to simulate natural daylight variations reduces effectiveness in adapting biological clock
Solution Approach 1:
The lighting system applies different lighting qualities to different phases of the flight, matching natural daylight characteristics for each time of day. Morning phases use cooler, brighter lighting to simulate sunrise, while evening phases use warmer, dimmer lighting to simulate sunset. This phase-specific approach enables effective simulation of daylight variations while managing control complexity through predefined lighting data for each phase
4Productivity
If lighting program does not consider flight duration and time zones, then simplicity of implementation is maintained, but effectiveness in reducing jetlag symptoms is significantly reduced
Solution Approach 1:
The system pre-calculates the lighting program before flight by determining departure and destination time zones, flight duration, and selecting appropriate phase sequences. The controller scales and adjusts the lighting phases in advance to match the specific flight parameters, ensuring effective jetlag reduction while managing complexity through automated preliminary calculations based on flight data
Data Source
AI summary
In a method for producing a light program (22) for controlling lighting in an interior (80) of an aircraft (82) during a flight, a sequence list (2a, b) of phases of the day (4a-l) for a full day is set, wherein a time of day (6), a phase duration (8) and lighting data (La-l) for the lighting are assigned to each phase of the day (4a-l), the appropriate phase of the day (4a-l) is selected from the sequence list (2a, b) as first program section (14a) of a flight program (10) on the basis of the local time (12a) at which the flight starts and the proportional associated phase duration (8) is assigned to the first program section as section duration (16a), the appropriate phase of the day (4a-l) is selected from the sequence list (2a, b) as last program section (14b-e) of the flight program on the basis of the local time (12b) at which the flight lands and the proportional associated phase duration (8) is assigned to the last program section (14b-e) as section duration (16b-e), the flight program (10) between first program section (14a) and last program section (14b-e) is filled with the phases of the day (4a-l), lying therebetween as per the sequence list (2a, b), as program sections (14b-d) and the associated phase durations (8) are assigned to the program sections (14b-d) as section durations (16b-d), at least one of the section durations (16a-e) is scaled on the basis of a scaling prescription in such a way that the overall duration of the flight program (10) corresponds to the flight duration (TF), the flight program (10) runs in time during the flight on the basis of the elapsed flight time (t), wherein the lighting data (La-l) of the respective current program section (14a-e) are output as light program (22) at each instant of the flight time (t).