Reverse Road Projection Control to Avoid Parking Line Confusion
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Solution Overview
Problem
Existing road surface drawing devices for vehicles face confusion between projected images and marks/lines on the road surface during reverse or parking operations, and lack the ability to quickly warn drivers of approaching obstacles.
Innovation Solution
A road surface drawing device that projects images based on a drawing pattern onto the road surface, includes a road surface drawing unit, a controller to control the projection, and an operation state acquisition unit to determine the vehicle's operation state, turning the device on/off accordingly, and an imaging unit to capture and compare the projected pattern with a basic pattern to change the lighting state when a difference is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the road surface drawing device projects images on the road surface during reverse operation, then the driver can see the projected image, but the projected image may be confused with existing marks and lines on the road surface
Solution Approach 1:
The patent applies dynamics by making the projection system adaptable to different vehicle operation states. The controller dynamically adjusts the projection based on whether the vehicle is moving forward or reversing, enabling the system to respond to changing conditions and eliminate visual confusion during reverse operations.
Solution Approach 2:
The patent changes the projection parameters (such as projection position, pattern, or intensity) based on the vehicle's operation state. When reverse operation is detected, the system modifies these parameters to ensure the projected image does not overlap with existing road marks and lines, thereby preventing visual confusion.
2Loss of information
If the road surface drawing device continuously projects images, then the driver can always see the projected information, but energy is wasted when the vehicle is not in reverse operation
Solution Approach 1:
The system dynamically controls the projection based on real-time detection of vehicle operation state. The controller activates the road surface drawing unit only when reverse operation is detected, and deactivates it during forward operation or parking, thereby eliminating unnecessary energy consumption while maintaining information availability when needed.
Solution Approach 2:
The system uses the vehicle's own operation state information (detected by the operation state acquisition unit) to automatically control its projection function. This self-service mechanism eliminates the need for continuous operation by having the system regulate itself based on its operational context.
3Device complexity
If the road surface drawing device only provides visual projection, then the system is simple, but the driver cannot be quickly warned of approaching obstacles
Solution Approach 1:
The patent makes the road surface drawing device multi-functional by enabling it to perform both information projection and obstacle detection/warning functions. The imaging unit captures images of the road surface, the comparison unit detects obstacles by comparing captured images with reference images, and the system provides auditory warnings through the speaker, thereby expanding the system's capabilities beyond simple visual projection.
Solution Approach 2:
The system implements feedback by using the imaging unit to continuously monitor the road surface area where objects are projected. The comparison unit compares captured images with reference images to detect changes indicating obstacles, and the controller provides immediate feedback through auditory warnings when obstacles are detected, creating a closed-loop safety system.
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
Prevents confusion between projected images and marks/lines on the road surface and quickly warns drivers of approaching obstacles by adjusting the lighting state based on vehicle operation and comparing projected patterns.
Implementation Method 1
a road surface drawing unit configured to irradiate the road surface with light to project an image on the road surface
Data Source
AI summary
A road surface drawing device for a vehicle and for projecting an image based on a drawing pattern onto a road surface. The road surface drawing device includes a road surface drawing unit configured to irradiate the road surface with light to project the image on the road surface, a controller configured to control the projection of the image by the road surface drawing unit, and an operation state acquisition unit configured to acquire an operation state of a vehicle. The controller is configured to control the road surface drawing unit in a reverse mode in response to determining that the operation state is reverse operation, and turn off the road surface drawing unit in response to determining that the operation state is not the reverse operation.