Spectral Light Sources With Image Sensing for Angular Shadow Control
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Solution Overview
Problem
Traditional light sources create shadows in environments and direct light into spatial zones where it is not needed, necessitating a system that optimizes illumination or irradiation for various modes.
Innovation Solution
An Angularly Varying Light Emitting Device (AVLED) system that adjusts spectral and/or flux output for multiple angular bins, using an imager to optimize light distribution and reduce shadows, with features like axially redirecting optical elements and sensors for real-time adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional light sources are used, then light is provided to the environment, but shadows are created and light is directed into spatial zones where it is not needed
Solution Approach 1:
The light emitting device is divided into multiple independently controllable light sources, each directed at different angular ranges. This segmentation allows selective illumination of different spatial zones, enabling light to be distributed only where needed rather than uniformly in all directions, thereby reducing shadows while maintaining illumination intensity.
Solution Approach 2:
Different angular ranges of the light emitting device are configured with different light sources having different spectral characteristics. This local quality approach allows optimization of light properties for specific spatial zones, improving illumination efficiency in target areas while minimizing light waste and shadow creation in areas where illumination is not required.
2Use of energy by moving object
If traditional light sources are used, then illumination is provided, but light is directed into spatial zones where it is not needed
Solution Approach 1:
The illumination system is segmented into multiple angularly-directed light sources that can be independently controlled. This allows the system to direct light only toward spatial zones where illumination is actually needed, rather than wasting energy illuminating areas that do not require light, thereby improving overall illumination efficiency and reducing energy loss.
Solution Approach 2:
The light emitting device incorporates dynamic control capabilities that allow real-time adjustment of which angular ranges are active based on environmental conditions and illumination needs. This dynamic adaptation enables the system to optimize energy usage by activating only the necessary light sources, reducing light waste while maintaining effective illumination efficiency.
3Adaptability or versatility
If multiple light sources with different spectral content are used in different angular bins, then illumination efficiency and adaptability are improved, but device complexity increases
Solution Approach 1:
The light emitting device is designed as a universal illumination system that can perform multiple illumination modes and functions through a single integrated structure. By incorporating multiple light sources with different spectral characteristics that can be independently controlled across different angular ranges, the device achieves versatile adaptability for various illumination needs while consolidating what would otherwise require multiple separate lighting systems, thereby managing device complexity.
Data Source
AI summary
A light emitting device includes a plurality of light sources configured to emit spectral light output of a different visible color with a peak wavelength differing by at least 20 nanometers into on or more angular bins in an environment external to the light emitting device during, a controller configured to modulate the first spectral light output of the first subset of the plurality of light sources at a rate undetectable by individuals in an environment external to the light emitting device, and a light sensor configured to capture images of the light reflected from the environment when illuminated with by the modulated first spectral light output.