Vehicle Information Projection System Trajectory Visualization
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Solution Overview
Problem
Conventional vehicle information projection systems, such as head-up displays, only provide the relative distance between a host vehicle and an overtaking vehicle, failing to intuitively convey the speed and direction of the approaching vehicle, making it difficult for drivers to determine the appropriate action.
Innovation Solution
A vehicle information projection system that includes a head-up display, a vehicle outside information acquisition unit, and a display controller, which projects a trajectory image on the windshield, dynamically changing its length and extension speed based on the relative distance and speed of the approaching vehicle, allowing drivers to accurately assess the approaching state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If only relative distance is displayed on the HUD device, then the display content is simple and easy to understand, but the user cannot intuitively know the speed and direction of the approaching vehicle
Solution Approach 1:
The patent transforms the display from a single-dimensional distance value into a two-dimensional trajectory image that shows both distance and direction. The trajectory image extends from the host vehicle position in the direction of the approaching vehicle, with length proportional to relative distance, adding spatial dimensionality to convey directional information without increasing textual complexity
Solution Approach 2:
The trajectory image is designed to be dynamic rather than static. It extends or retracts in length based on changes in relative distance, and its extension speed varies according to relative speed. This dynamic visualization continuously updates to reflect the current state of the approaching vehicle, providing intuitive real-time information about both distance and speed through motion
2Reliability
If detailed information about approaching vehicles is provided, then the user can make better driving decisions, but the display becomes more complex and harder to interpret
Solution Approach 1:
The trajectory image uses color coding to convey different levels of urgency and vehicle states. The color changes based on relative speed and distance, allowing users to quickly assess the situation without processing complex numerical data. This visual encoding maintains simplicity while providing reliable information for decision-making
Solution Approach 2:
The dynamic extension and retraction of the trajectory image provides intuitive feedback about the approaching vehicle's speed and distance changes. The rate of extension correlates with relative speed, allowing users to grasp the urgency of the situation through motion rather than static numbers, improving both reliability and ease of interpretation
Data Source
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Figure 3(a)~4(b)
Figure 5(a)~5(c)
AI summary
Provided is a vehicle information projection system capable of accurately determining the approaching state of an obstacle and assisting the driver in driving. A vehicle information projection system that enables a user to view an image showing a lane information image together with the actual view outside a host vehicle, wherein a rearward-information acquisition unit (204) detects the approaching of a rearward vehicle (W) as well as the relative distance (D) and the relative speed (V) between the host vehicle (2) and the rearward vehicle (W), and when the approaching of the rearward vehicle (W) is detected by the rearward-information acquisition unit (204), a display controller (300) performs display control so as to superpose and make visible a trajectory image (J) that indicates the approaching of the rearward vehicle (W) in a lane adjacent to that on which the host vehicle (2) is traveling as acquired by a lane-information acquisition means (201(202)).