Programmable LED Lighting for Colorblind Warehouse Identification
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Solution Overview
Problem
Existing shipping warehouse lighting systems are not colorblind-friendly and can induce seizures, as they often use red and green lights that colorblind individuals may misinterpret, and may cause optically induced seizures due to rapid brightness changes or blinking.
Innovation Solution
Implementing programmable LED lighting systems that use colors like red, blue, and orange, which are easily distinguishable for colorblind individuals, and controlling brightness changes to mitigate seizure risks by limiting rate and intensity changes, ensuring lights do not turn completely off during pulsing animations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If red and green lights are used to indicate container states, then the lighting system provides clear visual feedback for associates, but colorblind individuals may misinterpret the colors leading to errors
Solution Approach 1:
The patent transforms the colorblind-unfriendly red/green color scheme into a colorblind-friendly scheme by using blue and orange colors that are easily distinguishable by colorblind individuals. The system changes the color properties of the LED lights to emit wavelengths that create maximum contrast for colorblind vision, thereby maintaining reliable container state identification while accommodating colorblind associates.
Solution Approach 2:
The system changes the parameters of the light emission by using programmable LEDs that can output specific colors and brightness levels. By adjusting the color parameters to use blue and orange instead of red and green, and by controlling the brightness to provide sufficient contrast, the system achieves both colorblind accessibility and clear visual feedback for container states.
2Speed
If lights pulse or blink rapidly to attract attention, then associates can quickly identify containers requiring attention, but rapid brightness changes may induce optically induced seizures in susceptible individuals
Solution Approach 1:
The system uses periodic pulsing action to attract associate attention to containers requiring attention, but carefully controls the period and duty cycle of the pulsing to stay below seizure-inducing thresholds. The lights pulse at a rate that provides clear visual indication without creating the rapid flicker that triggers optically induced seizures in susceptible individuals.
Solution Approach 2:
The system changes the brightness parameter dynamically through controlled pulsing sequences, where the brightness transitions are smooth and the pulse duration and frequency are carefully selected. By limiting the rate of brightness change and avoiding complete on/off cycles, the system maintains high visibility for quick container identification while preventing seizure-inducing flicker patterns.
3Device complexity
If traditional red/green lighting is used, then the system is simple and cost-effective, but it fails to accommodate colorblind associates and may cause seizures
Solution Approach 1:
The patent implements a universal lighting system using programmable LEDs that can adapt their color and brightness output based on the container state and associate needs. The same lighting hardware performs multiple functions: indicating different container states through color changes, providing colorblind-friendly visual feedback, and controlling pulse patterns to prevent seizures. This multi-functional approach maintains system simplicity while dramatically improving safety and accessibility for all associates including colorblind individuals and those susceptible to optically induced seizures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables colorblind-friendly communication in warehouse settings by using distinguishable colors and controlled brightness changes, ensuring associates can accurately identify container states without the risk of seizures, improving operational efficiency and safety.
Implementation Method 1
Implementing programmable LED lighting systems that use colors like red, blue, and orange
Data Source
AI summary
Embodiments herein describe techniques for operating lighting systems which can be used by associates who are colorblind or are susceptible to optically induced seizures (e.g., photosensitive epilepsy). In one embodiment, the lighting system includes programmable light sources which permit the lighting system to use colors that a colorblind person can easily distinguish—e.g., red, blue, orange, etc. Put differently, the lighting system can choose colors which are easily distinguishable to a colorblind associate when instructing the associate to take an action. Moreover, the lighting system can pulse a light source by changing its brightness or intensity over time. The lighting system can control a maximum gradient change rate and a maximum intensity change to mitigate a risk of optical seizures when pulsing the light sources to mitigate the risk of inducing a seizure.