Vehicle Head-Up Display Viewpoint Tracking Distortion Correction
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Solution Overview
Problem
Conventional vehicle display devices, such as head-up displays, face challenges in accurately correcting display image distortions due to windshields and optical systems, especially when the driver's viewpoint position changes, as they require multiple distortion correction maps that exceed memory capacity limitations.
Innovation Solution
A display device for vehicles that includes a detection unit to determine the driver's actual viewpoint position and a controller to adjust a three-dimensional object for distortion correction within a virtual space, using texture mapping to offset distortions caused by the windshield and optical system, allowing for real-time adjustments of the display image based on positional changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple distortion correction maps are prepared for different viewpoint positions, then the accuracy of distortion correction is improved, but the memory capacity requirement increases
Solution Approach 1:
The patent segments the distortion correction approach by separating the correction data into two components: a base distortion correction map that covers the general distortion pattern, and viewpoint position information that specifies particular viewing angles. This segmentation allows the system to store one comprehensive base map rather than multiple separate maps for different viewpoints, reducing memory requirements while maintaining correction accuracy through selective application based on detected viewpoint position.
Solution Approach 2:
The patent creates a virtual copy of the distortion correction functionality by generating a distorted image that simulates how the display image appears from a specific viewpoint position. Instead of storing multiple correction maps, the system uses software-based image processing to generate viewpoint-specific corrections on-demand, effectively copying the correction effect rather than the correction data itself, thereby reducing memory capacity requirements.
2Reliability
If distortion correction is adjusted for each viewpoint position, then the visibility and accuracy of the virtual image is improved, but the device complexity increases
Solution Approach 1:
The patent implements self-service by enabling the system to automatically detect the driver's viewpoint position using a viewpoint position detection unit and autonomously select or generate the appropriate distortion correction without requiring manual configuration or complex external control systems. The system serves itself by integrating detection and correction functions into a unified automated process, reducing overall device complexity while maintaining high visibility and accuracy of the virtual image.
Solution Approach 2:
The patent employs feedback mechanisms where the detected viewpoint position information is fed back into the distortion correction process to dynamically adjust the correction parameters. This closed-loop feedback system allows the display control to automatically adapt the distortion correction based on real-time viewpoint detection, improving virtual image visibility without requiring complex manual adjustment mechanisms or multiple pre-configured correction systems.
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 accurate and real-time adjustment of the display image to match the driver's changing viewpoint position, reducing the need for multiple correction maps and minimizing memory requirements, while maintaining smooth image continuity and improving responsiveness.
Implementation Method 1
a display device for a vehicle, such as a head up display (HUD), is mounted on a vehicle such as an automobile. In the display device for a vehicle, there is a display device which projects a display image to be displayed on a display, on a wind shield through an optical system such as a reflection mirror
Data Source
AI summary
A display device for a vehicle displays an image at the time of seeing a three-dimensional object for distortion correction formed in a virtual space, from a reference eye point of a driver, on a display, as a display image. A controller performs texture mapping by pasting an original display image to the three-dimensional object for distortion correction, in the virtual space, and adjusts the three-dimensional object for distortion correction, according to a positional change between the reference eye point and an actual eye point. An adjustment unit changes a position of the three-dimensional object for distortion correction from a reference position, according to the positional change.