Road Surface Projection Control for Driver Seat Height Changes
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Solution Overview
Problem
The optical image projected on the road surface by existing vehicular road surface drawing devices can enter the driver's field of view, leading to reduced drivability.
Innovation Solution
A vehicular road surface drawing device with a projection device and control unit that adjusts the optical image's position and dimensions based on the driver's seat height, ensuring it does not enter the driver's view by shortening the distance and reducing the image size when the seat height exceeds a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the optical image is projected at a fixed position on the road surface, then the notification function is provided to pedestrians, but the image may enter the driver's field of view causing distraction and reduced drivability
Solution Approach 1:
The projection device dynamically adjusts the position and size of the optical image based on the detected driver's seat height. When the seat height exceeds a threshold, the system shortens the distance in the traveling direction between the end portion of the optical image and the vehicle, and reduces the dimension of the optical image in the traveling direction. This dynamic adaptation ensures the image remains effective for pedestrian notification while avoiding entry into the driver's field of view.
2Object-affected harmful factors
If the distance between the optical image and the vehicle is shortened, then the image avoids the driver's field of view, but the notification effectiveness to pedestrians may be reduced
Solution Approach 1:
The system changes multiple parameters of the optical image simultaneously: the distance in the traveling direction from the vehicle to the end portion of the image is shortened, and the dimension of the image in the traveling direction is reduced. These parameter adjustments are made in response to the driver's seat height detection, ensuring the image is positioned and sized appropriately to avoid driver distraction while maintaining adequate visibility for pedestrian notification.
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 the optical image from entering the driver's view, maintaining drivability by adjusting the image's position and size relative to the driver's seat height, thus minimizing distraction.
Implementation Method 1
a projection device that is provided in a vehicle including a driver's seat that is configured to adjust a height with respect to a floor face, and that projects an optical image on a road surface
Data Source
AI summary
A vehicular road surface drawing device includes: a projection device that is provided in a vehicle having a driver's seat capable of adjusting a height with respect to a floor face, and that is configured to project an optical image on a road surface on which the vehicle is traveling so as to be situated in front of the vehicle in a traveling direction of the vehicle; and a control unit configured to control the projection device such that, when the height of the driver's seat with respect to the floor face becomes equal to or greater than a first threshold value, the distance in the traveling direction between the end portion on a traveling direction side of the optical image and the vehicle is shorter than when the height is less than the first threshold value.