Adaptive Headlight Color Alerts for Recommended Speed Guidance
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Solution Overview
Problem
Automated driving systems (ADS) struggle to effectively communicate recommended speed changes to operators without causing distractions or confusion, as haptic feedback on pedals can be misunderstood and audible alarms may startle operators, impacting safety.
Innovation Solution
Adaptive headlight color systems that adjust based on the difference between vehicle speed and recommended speed, using a color map optimized for human perception to provide intuitive visual alerts, such as shades of blue or yellow for moderate speed deviations and red for high deviations, while maintaining normal illumination for driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If haptic feedback on brake pedal is used to communicate recommended speed, then feedback is provided to operator, but operator may be confused or distracted creating unsafe conditions
Solution Approach 1:
The patent introduces a visual intermediary (headlight color change) between the ADS system and the operator to communicate speed recommendations. Instead of directly applying haptic feedback that may be misinterpreted, the system uses color-coded visual signals projected through the headlight assembly to convey speed deviation information, with colors mapped to different speed ranges relative to the recommended speed.
Solution Approach 2:
The patent replaces the mechanical haptic feedback system with an optical signaling system. The headlight assembly, which normally provides illumination, is adapted to project color-coded visual patterns that encode speed recommendation information, substituting mechanical vibration with optical information transmission to avoid operator confusion.
2Reliability
If audible alarm is used to communicate recommended speed, then feedback is provided to operator, but operator may be startled impacting safety
Solution Approach 1:
The patent introduces a visual intermediary (headlight color projection) as a gentler alternative to audible alarms. The color-coded visual signals provide continuous information about speed deviations without the sudden, startling nature of audible alerts, allowing operators to gradually adjust their understanding of the recommended speed.
Solution Approach 2:
The patent utilizes color changes in the headlight projection to encode different speed recommendation states. Different colors represent different relationships between current and recommended speeds, providing intuitive visual feedback that is less alarming than audible warnings while maintaining clear communication of the speed guidance.
3Loss of information
If headlight color is adjusted to communicate speed alerts, then operator awareness is enhanced, but operator perception of visible colors must be optimized
Solution Approach 1:
The patent adjusts the parameters of light emission from the headlight assembly to optimize for human color perception. This includes selecting specific wavelength ranges and intensity levels that maximize the distinguishability of different speed recommendation states while accounting for nighttime viewing conditions and human visual sensitivity characteristics.
Solution Approach 2:
The patent applies different color characteristics to different regions or aspects of the headlight projection to encode different types of speed information. The color mapping is strategically designed so that specific colors or color intensities correspond to specific speed deviation ranges, creating a localized quality distribution that optimizes information communication.
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
Enhances operator awareness of speed changes without distracting them from the road, improving safety by providing clear and intuitive visual feedback through headlight color adjustments.
Implementation Method 1
adapt an alert color projected by headlights of the vehicle according to the vehicle speed and the alert color is corrected for operator perception of visible colors
Data Source
AI summary
System, methods, and other embodiments described herein relate to communicating alerts about a recommended speed by adapting headlight color. In one embodiment, a method includes computing a recommended speed using an automated driving system (ADS) during an operator controlling a vehicle while the ADS is disengaged. The method also includes, responsive to determining that a vehicle speed satisfies a threshold associated with the recommended speed and an offset value set according to a driving environment, adapting an alert color projected by headlights of the vehicle according to the vehicle speed and the alert color is corrected for operator perception of visible colors associated with the driving environment.