Road Surface Projection Control for Wet-Road Reflection Suppression
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Solution Overview
Problem
Existing vehicle systems that project light onto a road surface for rendering patterns can cause intense light irradiation to oncoming or preceding vehicles due to total reflection, especially on wet surfaces, potentially distracting or blinding drivers.
Innovation Solution
A vehicle equipped with a projection member, a controller, and an external camera that projects light for road surface rendering while the controller suppresses light projection based on the road surface reflection state determined by the external camera's captured image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If light is projected onto the road surface for rendering patterns, then the vehicle can provide driving information to the driver via the road surface, but intense light may be reflected to oncoming or preceding vehicles causing distraction or blindness
Solution Approach 1:
The system performs preliminary detection of the road surface reflection state using an external camera before projecting light. Based on this advance detection, the controller determines whether the road surface is in a state that would cause harmful reflection, and only then decides whether to permit light projection. This preliminary action prevents harmful light irradiation before it occurs.
Solution Approach 2:
The external camera continuously monitors the road surface reflection state and provides feedback to the controller. The controller adjusts the light projection decision based on this real-time feedback about the road surface condition. When the camera detects a wet or highly reflective road surface, the feedback triggers the controller to suppress light projection, thereby preventing harmful reflection to other vehicles.
2Object-affected harmful factors
If light projection is suppressed on wet surfaces to prevent harmful reflection, then safety is improved, but the road surface rendering function cannot be used when it might be effective
Solution Approach 1:
The system dynamically adjusts the light projection function based on real-time road surface conditions detected by the external camera. Rather than a fixed suppression rule, the controller continuously evaluates the reflection state and adapts the light projection decision accordingly. This dynamic approach allows the system to maximize road surface rendering availability while maintaining safety by suppressing light only when necessary.
Solution Approach 2:
The system changes the operational parameter of light projection based on the detected road surface reflection state. When the external camera detects a wet or highly reflective surface, the controller changes the projection state from active to suppressed. This parameter change ensures safety on problematic surfaces while allowing normal operation on suitable surfaces, thereby maintaining adaptability.
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 system effectively prevents intense light irradiation to other vehicles by determining the road surface reflection state and adjusting the light projection accordingly, thereby improving road surface rendering safety and effectiveness.
Implementation Method 1
The projection member is configured to project light for road surface rendering from the vehicle that is traveling to render a road surface rendered image on a road surface around the vehicle
Implementation Method 2
Existing vehicle systems that project light onto a road surface for rendering patterns can cause intense light irradiation to oncoming or preceding vehicles due to total reflection, especially on wet surfaces
Data Source
AI summary
A vehicle with a road surface rendering function includes a projection member, a controller, and an external camera. The projection member is configured to project light for road surface rendering from the vehicle that is traveling to render a road surface rendered image on a road surface around the vehicle. The controller is configured to control light projection for the road surface rendering by the projection member. The external camera provided on the vehicle and configured to capture an image of the road surface so that the image includes surroundings of the road surface rendered image. The controller is configured to suppress the light projection from the projection member for the road surface rendered image by making determination on a road surface reflection state based on the image captured by the external camera.