AR Head-Up Display Mirror Control for Stable Scenery Overlap
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Solution Overview
Problem
Existing AR-HUD systems struggle to maintain the overlap of virtual images with actual scenery during vehicle vibrations or inclinations, compromising the AR function's effectiveness.
Innovation Solution
A head-up display apparatus that includes a vehicle information acquisition unit, controller, video image display, mirror, mirror driver, and display distance adjusting mechanism to adjust the virtual image's position and distance relative to the scenery based on vehicle conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the virtual image position is fixed on the windshield, then the HUD structure is simple, but the virtual image cannot be overlapped with actual scenery when the vehicle vibrates or inclines
Solution Approach 1:
The patent implements dynamic adjustment of the virtual image position by controlling the mirror's inclination angle through a mirror driver. The controller receives vehicle state information (vibration, inclination) and adjusts the mirror angle in real-time to compensate for these changes, enabling the virtual image to maintain proper overlap with actual scenery despite vehicle movements
Solution Approach 2:
The system uses feedback from vehicle state sensors (accelerometers, gyroscopes, inclination sensors) to continuously monitor vehicle vibration and inclination. This feedback is processed by the controller which then adjusts the mirror position accordingly, creating a closed-loop control system that maintains AR functionality under varying vehicle conditions
2Reliability
If the display region is adjusted to maintain visibility, then the virtual image remains visible, but the overlap with actual scenery is lost
Solution Approach 1:
The system dynamically adjusts the mirror inclination angle based on real-time vehicle state information. When the vehicle vibrates or inclines, the controller calculates the required mirror adjustment to compensate for the displacement, thereby maintaining both visibility and proper overlap with actual scenery simultaneously
3Adaptability or versatility
If multiple adjustment mechanisms are added to maintain both visibility and AR overlap, then AR functionality is improved, but the device complexity increases
Solution Approach 1:
The mirror serves multiple functions: it directs the video image to the windshield for visibility and simultaneously its adjustable inclination enables AR overlap accuracy. By making this single component adjustable rather than adding separate mechanisms, the system achieves multi-functionality without proportionally increasing complexity
Solution Approach 2:
The controller acts as an intermediary that processes vehicle state information and translates it into mirror position commands. This centralized control approach coordinates the mirror adjustment to simultaneously satisfy both visibility and AR overlap requirements, avoiding the need for multiple independent adjustment mechanisms
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the AR-HUD to suitably overlap virtual images with actual scenery, ensuring effective AR functionality despite vehicle vibrations or inclinations.
Implementation Method 1
a mirror (51) configured to reflect the video image formed by the video image display (30) to project onto the windshield (3)
Data Source
AI summary
The head-up display apparatus includes: a vehicle information acquisition unit configured to acquire various kinds of vehicle information which can be detected by a vehicle; a controller configured to control display of a video image based on the vehicle information; a video image display configured to form the video image based on an instruction from the controller; a mirror configured to reflect the video image formed by the video image display to project onto the windshield; a mirror driver configured to change an angle of the mirror based on an instruction from the controller; and a display distance adjusting mechanism configured to adjust a display distance of the virtual image with respect to the driver, and the controller adjusts the angle of the mirror via the mirror driver based on the vehicle information such that the virtual image can be displayed with respect to the driver overlapped with the scenery.