AR-HUD Controller Dynamic Correction for Vehicle Attitude
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Solution Overview
Problem
Existing in-vehicle augmented reality head-up displays (AR-HUDs suffer from misalignment issues due to changes in vehicle attitude angles, leading to inaccuracies in overlaying virtual images on the actual view.
Innovation Solution
A display device that adjusts correction amounts for content placement based on vehicle-related information, using a controller to determine and correct the position of virtual images relative to target objects, ensuring accurate alignment even with vehicle sway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed correction amount is used for content placement in AR-HUD, then the device complexity is reduced, but the alignment precision deteriorates when vehicle attitude changes
Solution Approach 1:
The patent implements dynamic correction by adjusting the correction amount based on detected vehicle attitude changes. The system transitions from a static correction approach to a dynamic one that adapts to real-time vehicle movements, thereby maintaining alignment precision without requiring overly complex hardware modifications.
Solution Approach 2:
The system employs feedback mechanisms by detecting vehicle attitude changes and using this information to adjust the correction amount for content placement. This closed-loop control ensures that the virtual image remains aligned with the actual view despite vehicle movements, resolving the contradiction between precision and complexity.
2Measurement precision
If the correction amount is adjusted for each content based on placement position, then the alignment precision is improved, but the calculation complexity increases
Solution Approach 1:
The patent applies different correction amounts to different contents based on their specific placement positions within the display region. This localized correction approach improves alignment precision for each content element while avoiding the need for complete recalculation of all contents, thereby managing calculation complexity through selective processing.
Solution Approach 2:
The system changes the correction amount parameter dynamically based on the placement position of each content and the detected vehicle attitude. By adjusting this parameter selectively for different contents rather than using a uniform correction, the system achieves higher precision while keeping the computational burden manageable through targeted parameter modification.
3Measurement precision
If the correction amount is increased to compensate for vehicle sway, then the alignment precision is improved, but the display stability deteriorates due to over-correction
Solution Approach 1:
The patent applies partial correction by adjusting the correction amount based on the actual vehicle attitude change detected. Rather than applying maximum or excessive correction, the system calculates and applies only the necessary correction amount, preventing over-correction while maintaining alignment precision. This balanced approach avoids display instability caused by excessive adjustment.
Data Source
AI summary
A display device includes: a controller that determines at least one content to be displayed in association with a target object that is present in a forward view of a vehicle; and a display that displays the at least one content as a virtual image through a display medium provided in the vehicle by projecting, onto the display medium, light that represents the at least one content determined by the controller. The controller adjusts, for each of the at least one content, a correction amount relating to a placement position of the content.