Head-Up Display Object Positioning Using Roadway Reference Alignment
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Solution Overview
Problem
Current head-up display devices for vehicles experience erratic and counter-intuitive displays when the vehicle changes orientation relative to objects or environmental areas, leading to temporary disappearance and unexpected re-appearance of displayed objects from the driver's field of view.
Innovation Solution
A method that uses a virtual reference feature aligned with the roadway's orientation to stabilize the horizontal position of displayed objects, ensuring they remain visible even when the surrounding area is outside the field of view, by defining a virtual reference feature based on the roadway's direction and continuously adjusting the object's position relative to this feature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If objects are assigned to surrounding areas and displayed only when these areas are in the field of vision, then the display is location-specific and contextually relevant, but the objects temporarily disappear and reappear unexpectedly when the vehicle orientation changes
Solution Approach 1:
The patent applies dynamics by transitioning from a static display approach (objects only visible when assigned area is in field of vision) to a dynamic approach where objects are continuously displayed and repositioned based on vehicle orientation. The horizontal position of displayed objects is continuously adjusted according to the relative orientation between the vehicle and the virtual reference feature, ensuring objects remain visible during steering maneuvers while maintaining contextual relevance.
Solution Approach 2:
The patent introduces a virtual reference feature (such as a virtual line or area aligned with the roadway) as an intermediary element. This reference feature serves as a stable reference frame that mediates between the vehicle's changing orientation and the displayed objects. By calculating horizontal positions relative to this intermediary reference feature rather than directly relative to the field of vision boundaries, the system achieves smooth, intuitive object positioning that maintains display reliability during vehicle maneuvers.
2Adaptability or versatility
If the horizontal position of displayed objects is adjusted based on vehicle orientation to surrounding areas, then location-specific information can be displayed, but erratic and counter-intuitive position changes occur when vehicle orientation changes
Solution Approach 1:
The virtual reference feature acts as a stable intermediary that provides a consistent reference frame for positioning objects. Instead of directly calculating object positions based on the dynamic relationship between the vehicle and surrounding areas, the system uses the virtual reference feature (aligned with roadway orientation) as an intermediate reference. This intermediary enables location-specific displays while ensuring predictable, intuitive object positioning by anchoring all position calculations to this stable reference.
Solution Approach 2:
The patent changes the reference parameter from which horizontal positions are calculated. Instead of using the field of vision boundaries or direct vehicle-to-object orientation as the reference parameter, the system uses the virtual reference feature's orientation (aligned with the roadway) as the new reference parameter. This parameter change transforms erratic position changes into smooth, predictable adjustments that maintain location-specific information while improving display consistency.
Data Source
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Figure 3
Figure 4A~4F
AI summary
The invention relates to a head-up display device (20) and a method for operating a head-up display device (20) for a motor vehicle (10), wherein virtual objects (22) can be assigned to environmental areas (MK) of the motor vehicle (10) and the method comprises: - obtaining a virtual reference feature (30) whose orientation is defined depending on a roadway (12) used or usable by the motor vehicle (10); - determining an orientation of the motor vehicle (10) relative to the virtual reference feature (30); - displaying a virtual object (22) when the assigned environmental area (MK) lies in a field of view (21) of the head-up display device (20), wherein a horizontal position of the displayed object (22) in the field of view (21) depends on the relative orientation to the virtual reference feature (30).