Automotive Augmented Reality Head-Up Display Adaptive Alignment
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Solution Overview
Problem
Existing automotive augmented reality Head-Up Display (HUD) systems face challenges in accurately matching virtual object information with real-world information due to technical limitations in detecting the vehicle's position, posture, and the driver's head and eye positions, leading to errors in location alignment and reduced driving safety and convenience.
Innovation Solution
An automotive augmented reality HUD apparatus and method that includes a viewing angle calculation unit to estimate the driver's line-of-sight direction, a matching unit to align virtual object information with real-world information, and a display unit capable of rotation and location adjustment, with an adjustment unit to correct matching errors, allowing precise alignment of virtual and real-world information based on the driver's visual field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the locations of virtual information are displayed without matching real-world locations, then the device complexity is reduced, but the driver recognition load increases and driving safety deteriorates
Solution Approach 1:
The system performs preliminary detection of the driver's head position, eye position, and line-of-sight direction before displaying virtual information. By pre-calculating the viewing angle and matching virtual object locations with real-world information locations in advance, the system ensures accurate alignment without increasing operational complexity during driving.
Solution Approach 2:
The patent replaces complex mechanical tracking systems with optical-based detection methods. Instead of using mechanical devices to track driver eye movements and head position, the system uses image processing and geometric calculations based on captured images of the driver's face and eyes, thereby reducing device complexity while maintaining accurate location matching.
2Measurement precision
If the position and posture of the vehicle and driver are precisely detected to match augmented reality information locations, then the location matching accuracy is improved, but the device complexity and detection difficulty increase
Solution Approach 1:
The system introduces an intermediary calculation process that uses easily detectable features (head position, eye position, pupil center) to derive the viewing angle and line-of-sight direction. Instead of directly measuring complex parameters like exact eye gaze direction or head orientation angles, the system uses these as intermediate steps to achieve accurate location matching through geometric relationships.
Solution Approach 2:
The patent changes the measurement parameters from directly measuring complex orientation angles and gaze directions to measuring more easily detectable parameters such as head position coordinates, eye position coordinates, and pupil center positions. These parameter changes simplify the detection process while maintaining the ability to calculate accurate viewing angles through mathematical relationships.
3Device complexity
If the display location is fixed, then the device complexity is reduced, but the adaptability to different driver visual fields deteriorates
Solution Approach 1:
The system implements dynamic display location adjustment by calculating the viewing angle based on the driver's head position and eye position. The display location is not fixed but dynamically determined through geometric calculations involving the driver's actual visual field, allowing the virtual information to be accurately positioned according to each driver's unique viewing angle without requiring complex mechanical adjustment mechanisms.
Data Source
AI summary
Disclosed herein is an automotive augmented reality HUD apparatus and method, which can adaptively change a location and a direction based on the visual field of a driver, thus reducing errors in location matching between virtual object information and real-world information. The automotive augmented reality HUD apparatus includes a viewing angle calculation unit for estimating a line-of-sight direction of a driver using a face direction, detected based on face images of the driver, and center positions of pupils and calculating a viewing angle. A matching unit matches a location of real-world information located in front of a driver's seat with a location of corresponding virtual object information located in front of the driver's seat, based on the line-of-sight direction and the viewing angle. A display unit displays results of the matching by the matching unit, wherein the display unit enables rotation thereof and location change thereof.