Vehicular Projection Display Priority-Based Obstacle Avoidance
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Solution Overview
Problem
Existing head-up display systems can make important real images, such as obstacles, less visible to drivers by superimposing virtual information, potentially reducing driving safety and causing annoyance due to frequent adjustments in the driver's line of sight.
Innovation Solution
A vehicular projection display apparatus that assigns priority ranks to display contents and adjusts their positions based on importance, relocating them to prevent overlap with obstacles and maintain visibility, especially for newly appearing or increased importance obstacles, while minimizing driver annoyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a virtual image is displayed on the straight line connecting the driver's eyeballs and an obstacle, then the virtual image is visible to the driver, but the obstacle becomes less visible and driving safety is compromised
Solution Approach 1:
The display position of the virtual image is dynamically adjusted based on the detected position of obstacles and the driver's line of sight. When an obstacle is detected, the system automatically relocates the virtual image to a position that does not overlap with the obstacle, ensuring both the virtual image and obstacle remain visible to the driver.
Solution Approach 2:
The system introduces an intermediary control mechanism that detects obstacles and calculates optimal display positions. This intermediary process mediates between the need to display virtual information and the need to maintain visibility of real obstacles, automatically adjusting the virtual image position to resolve the conflict.
2Object-affected harmful factors
If the virtual image is moved to avoid overlapping with an obstacle, then the obstacle remains visible, but the driver's line of sight must be adjusted which causes annoyance
Solution Approach 1:
The system performs preliminary action by proactively moving the virtual image to a safe position before the driver's line of sight would naturally shift. By anticipating the need for line of sight adjustment and pre-relocating the virtual image to a position that maintains driver comfort, the system prevents annoyance while ensuring obstacle visibility.
Solution Approach 2:
The system continuously monitors the driver's line of sight and obstacle positions, using this feedback to dynamically adjust virtual image placement. This closed-loop control ensures that virtual images are positioned optimally based on real-time conditions, maintaining both obstacle visibility and driver comfort without requiring manual adjustment.
3Loss of information
If multiple virtual images are displayed at different positions, then information completeness is improved, but the arrangement becomes difficult to recognize as a whole set
Solution Approach 1:
The system merges multiple virtual images into a cohesive display arrangement by considering their relative positions and relationships. When relocating virtual images to avoid obstacles, the system maintains spatial relationships between multiple images, ensuring they remain recognizable as a unified set while still avoiding obstacle overlap.
4Stability of the object's composition
If the virtual image is kept at a fixed position, then the display is stable and easy to locate, but it may overlap with newly detected obstacles reducing visibility
Solution Approach 1:
The system transitions from a static display approach to a dynamic one, where the virtual image position is continuously adjusted based on detected obstacles. When a new obstacle is detected, the system automatically relocates the virtual image to maintain both position stability (from the driver's perspective) and obstacle visibility, resolving the contradiction between fixed positioning and obstacle avoidance.
Data Source
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Figure 3A~3B
AI summary
Display priority ranks are assigned to plural respective display contents to be projection-displayed as virtual images. When a new obstacle is detected or the degree of importance of each display content has changed to a large extent due to a situation change, the plural display contents are relocated according to the respective priority ranks assigned to them. A display content for arousing attention is displayed as a virtual image in the vicinity of an obstacle that has not been recognized by a driver yet. Display contents whose priority ranks are lower than the attention-arousing display content are relocated to as to go away from the obstacle. Display contents that need not be superimposed on a real image are relocated to regions that are close to the driver.