AR Head-Up Display Rendering for Off-Axis Navigation Visibility
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Solution Overview
Problem
Existing augmented reality head-up displays in vehicles suffer from display errors due to positioning inaccuracies, causing navigation instructions to be displayed outside the field of view or only partially, especially during steering maneuvers.
Innovation Solution
The method involves extending virtual display elements laterally beyond the field of view and adjusting their rendering based on the vehicle's position and steering angle, ensuring at least the element closest to the center is always visible, with optional adjacent elements rendered with decreasing brightness or only within the field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If virtual display elements are positioned precisely according to vehicle position data, then navigation accuracy is improved, but positioning inaccuracies cause display elements to appear outside the field of view
Solution Approach 1:
The system pre-calculates and renders multiple virtual display elements at potential navigation locations before the vehicle actually reaches them. By preparing display elements in advance based on predicted vehicle position and steering angle, the system ensures that navigation information is already positioned within the field of view when needed, compensating for positioning inaccuracies and vehicle movement during steering maneuvers
Solution Approach 2:
The system extends the display approach from a single precise location to multiple spatial dimensions by rendering virtual elements at various lateral positions and distances. Instead of displaying one navigation element exactly at the calculated position, the system creates multiple elements across different spatial coordinates, ensuring that at least one element remains visible within the field of view despite positioning errors or vehicle movement
2Manufacturing precision
If navigation instructions are displayed at the exact calculated position, then positioning precision is improved, but vehicle movement during steering causes instructions to move outside the field of view
Solution Approach 1:
The system dynamically adjusts which virtual display elements are rendered based on real-time vehicle position changes and steering angle. Instead of statically positioning navigation elements, the system continuously evaluates vehicle movement and adapts the set of visible elements, ensuring that navigation instructions remain adaptable to ongoing vehicle dynamics while maintaining precise positioning within the field of view
Solution Approach 2:
The system changes display parameters by adjusting the brightness and visibility of different virtual elements based on vehicle position and steering angle. When the vehicle moves or steers, the system modifies which elements are rendered and their display intensity, allowing the navigation display to adapt to vehicle movement while maintaining precise positional accuracy for the visible elements
Data Source
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AI summary
The present invention relates to a method, a computer program with instructions and an apparatus for generating a display for an augmented reality head-up display of a motor vehicle. In a first step, a position of the motor vehicle is determined (10). A plurality of virtual elements for displaying a navigation instruction is provided (11) on the basis of the position of the motor vehicle. The virtual elements, as seen from the motor vehicle, extend at both sides in a lateral direction as far as outside a field of view of the a augmented reality head-up display. Finally, at least the virtual element (12) is rendered that has the shortest distance to a center of the field of view.