Sensor-Synchronized Spectral Light Sources for Shadow-Reduced Illumination
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Solution Overview
Problem
Traditional light sources create shadows 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, allowing independent control of light flux and spectral content to enhance efficiency and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional light sources are used to illuminate the environment, then the illumination intensity is sufficient, 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 capable of emitting light in different angular ranges. This segmentation allows the system to illuminate different spatial zones separately, reducing shadows by providing multiple light angles while preventing light from entering zones where it is not needed through independent angular control of each light source group.
2Area of stationary object
If traditional light sources are used to illuminate the environment, then the illumination coverage is broad, but light is directed into spatial zones where it is not needed
Solution Approach 1:
The system implements local quality control by independently adjusting the light flux output for different angular bins corresponding to different spatial zones. Each angular bin can be optimized for its specific illumination needs, ensuring light is directed only where required rather than broadly across all zones, thereby reducing energy waste in areas where illumination is not needed.
Solution Approach 2:
The light emitting device employs dynamic control capabilities where the light flux output for each angular bin can be independently adjusted in real-time. This dynamic adjustment allows the system to adapt illumination distribution to changing environmental conditions and spatial requirements, optimizing energy efficiency by directing light only to zones that require illumination at any given moment.
3Illumination intensity
If light flux output is increased to improve illumination, then the illumination intensity is improved, but energy consumption increases
Solution Approach 1:
The system changes the parameter of light flux output independently for different angular bins rather than uniformly increasing all light sources. By selectively adjusting light flux parameters only in angular bins that require additional illumination, the system achieves improved illumination intensity in specific zones while minimizing overall energy consumption compared to uniformly increasing all light sources.
Data Source
AI summary
A light emitting device includes a plurality of light sources individually addressable to sequentially emit spectral light output of a different visible color with a peak wavelength differing by at least 20 nanometers into at least one angular bin in an environment external to the light emitting device during a first time period, and an image sensor synchronized to sequentially capture images representing spectral light output reflected from the environment from the plurality of light sources during the first time period, wherein the light emitting device adjusts a light flux output from the plurality of light emitting diodes during a second time period after the first time period based at least in part on information from the images. The light sources of the same color may emit light during a time period less than 17 milliseconds during the first time period.