Vehicle Ground Projection Compensation for Ride Height Changes
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Solution Overview
Problem
Existing projection systems in motor vehicles struggle to maintain clear and precise image projection onto the ground due to variations in vehicle height caused by loads, requiring manual optical adjustments that are often inaccessible and inconvenient.
Innovation Solution
A projection system with a ride height control mechanism using sensors to detect deviations from a reference height, selecting and projecting appropriate images with optical deformations to compensate for these variations, ensuring clear and precise projection without manual lens adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the vehicle carries loads (trunk, rear seats, roof, bicycle rack), then the vehicle body height deviates from reference value, but this causes the projected image to become blurry and imprecise
Solution Approach 1:
The patent implements dynamic adjustment of the projection system by detecting vehicle height deviations through sensors and automatically adjusting the projection lens focal length or projection distance in real-time. This dynamic compensation mechanism ensures that the projected image remains sharp and precise regardless of vehicle load conditions, resolving the contradiction between vehicle adaptability and image precision.
Solution Approach 2:
The system changes optical parameters (focal length, projection distance) based on detected vehicle height variations. By dynamically modifying these parameters in response to load conditions, the system maintains optimal image quality across different vehicle configurations, thereby resolving the contradiction between versatility and precision.
2Manufacturing precision
If manual optical adjustment of projection devices is implemented, then image sharpness can be maintained, but the adjustment becomes inaccessible and inconvenient for users
Solution Approach 1:
The projection system performs self-adjustment by automatically detecting vehicle height deviations and compensating for them without requiring user intervention. The system uses sensors to monitor vehicle position and autonomously modifies projection parameters, making the adjustment process invisible and convenient for users while maintaining image sharpness.
Solution Approach 2:
The system implements a closed-loop feedback mechanism where sensors continuously monitor vehicle height and feed this information to the control system, which then adjusts projection parameters accordingly. This automatic feedback-based adjustment eliminates the need for manual intervention while maintaining optimal image quality, resolving the contradiction between precision and ease of operation.
3Device complexity
If projection devices are located in lower part of exterior mirrors or rocker panels, then the system achieves compact integration, but the adjustment mechanisms become inaccessible
Solution Approach 1:
The patent replaces manual mechanical adjustment mechanisms with electronic/actuated adjustment systems. The projection devices use electric motors or piezoelectric actuators controlled by electronic systems to adjust focal length and projection distance, eliminating the need for accessible manual adjustment components while maintaining compact integration in mirror or rocker panel locations.
Data Source
Figure 1
AI summary
The invention relates to a projection system, intended to equip a motor vehicle (1), for projecting at least one image in the vicinity of the motor vehicle (1), this system comprising: - a projection device (2, 3) provided with a plurality of images (14, 15); - an attitude corrector (4) capable of calculating a deviation between the attitude of the motor vehicle (1) and a reference attitude associated with said motor vehicle (1); - a computer (9) configured to select, from said plurality of images (14, 15), an image to be projected by the projection device (2, 3), the selected image being associated with the deviation calculated by the attitude corrector (4).