Vehicle Head-Up Display Speed-Adaptive Warping Control
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Solution Overview
Problem
Head-up displays in vehicles face distortion issues due to windshield curvature variations and dynamic deformations caused by driving speed, leading to inconsistent and annoying augmented reality displays.
Innovation Solution
A control device that determines a speed-dependent warping matrix to compensate for windshield curvature and dynamic deformations, using multiple constant warping matrices and interpolation to ensure a distortion-free display across various driving speeds, which can be integrated into the head-up display or infotainment system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a windshield with nonconstant curvature is used for the head-up display, then the display can be integrated into the vehicle structure, but the display image becomes distorted due to the curvature
Solution Approach 1:
The patent applies parameter changes by transforming the display image parameters (coordinates, scaling, warping) based on the known windshield curvature characteristics. The control device uses a transformation matrix that maps the display coordinates to the curved windshield surface, compensating for the distortion caused by the nonconstant curvature. This allows the use of curved windshields while maintaining display accuracy.
2Adaptability or versatility
If the vertical position of display items is adjusted based on driving speed, then the display adapts to driver viewing behavior, but distortion occurs due to vertical curvature variations
Solution Approach 1:
The patent implements dynamics by making the transformation parameters speed-dependent. The control device adjusts the warping matrix and transformation parameters dynamically based on the detected driving speed. This allows the display to adapt to changing driver viewing positions at different speeds while compensating for the corresponding curvature variations in the vertical direction.
3Manufacturing precision
If multiple transformation parameters are used to compensate for curvature, then display accuracy improves, but the system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing transformation matrices for different driving speeds and curvature conditions. Instead of performing complex real-time calculations, the system selects the appropriate pre-computed transformation matrix based on the current speed, significantly reducing computational complexity while maintaining high display accuracy.
4Reliability
If the windshield curvature varies dynamically during driving, then the display must be continuously adjusted, but this requires complex real-time calibration
Solution Approach 1:
The patent applies parameter changes by using speed-based transformation parameters that account for dynamic windshield curvature changes. The system detects driving speed and selects appropriate transformation parameters from pre-calculated sets, avoiding the need for complex real-time calibration while maintaining display consistency under varying driving conditions.
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
The solution provides nearly distortion-free displays, maintaining consistent spatial relationships between real objects and augmented reality elements, regardless of driving speed, and can be retrofitted into existing head-up displays.
Implementation Method 1
a control device of a vehicle transforms a display image to be displayed by a windshield of the vehicle into a reflection image to be reflected by the windshield
Data Source
AI summary
A method for operating a head-up display (HUD) of a vehicle, in which a control device of a vehicle transforms a display image to be displayed by a windshield of the vehicle into a reflection image to be reflected by the windshield and a display unit of a head-up display of the vehicle that is associated with the windshield displays the transformed reflection image, and a control device for a head-up display of a vehicle and a vehicle.