Dual Light Source Illumination System for Mobile Body
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Solution Overview
Problem
Conventional illumination systems in mobile bodies, such as airplanes, are inadequate for providing a comfortable light environment for both reading and dining, as they are not optimized for these specific tasks, leading to suboptimal illuminance and color temperature settings.
Innovation Solution
An illumination system comprising a dining light and a reading light, where the dining light illuminates the table with a lower illuminance than the reading light, which illuminates a region closer to the passenger, and a lighting control method that adjusts the light sources based on detected food on the table to optimize the lighting mode for dining or reading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single light source is used to illuminate both the table and the reading region, then the device complexity is reduced, but the illumination quality for both dining and reading deteriorates
Solution Approach 1:
The illumination system is divided into two independent light sources: a first light source for illuminating the table surface and a second light source for illuminating the reading region. This segmentation allows each light source to be optimized for its specific function, with the first light source providing appropriate illuminance for dining and the second light source providing higher illuminance for reading, thereby resolving the contradiction between device simplicity and illumination quality.
2Illumination intensity
If the illuminance on the table is increased to improve dining visibility, then the dining visibility is improved, but the comfort and pleasantness of the light environment deteriorates
Solution Approach 1:
Different illuminance levels are applied to different regions: the table region receives lower illuminance (100-500 lux) suitable for dining comfort and food appearance, while the reading region receives higher illuminance (500-1000 lux) for reading visibility. This local differentiation of illumination quality allows each function to have its optimal lighting conditions without compromising the other, resolving the contradiction between dining visibility and light environment comfort.
3Device complexity
If a conventional reading light is used for both reading and dining, then the device complexity is reduced, but the suitability for reading function deteriorates
Solution Approach 1:
The system uses two light sources with different illumination parameters: the first light source provides lower illuminance suitable for dining, while the second light source provides higher illuminance specifically optimized for reading. This parameter differentiation ensures that the reading function receives adequate illuminance (500-1000 lux) while the dining function maintains appropriate lighting (100-500 lux), resolving the contradiction between device simplicity and reading suitability.
Data Source
AI summary
An illumination system includes: a seat in a mobile body; a table to be positioned in front of a passenger when the passenger is seated on the seat; a first light source which illuminates the table; and a second light source which illuminates a region closer to the passenger than to the table. When a distance from the first light source to the table is equal to a distance from the second light source to a virtual irradiated surface, an illuminance on the table irradiated by the first light source is lower than an illuminance on the virtual irradiated surface irradiated by the second light source.