Vehicle Display Device Viewpoint Tracking
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Solution Overview
Problem
Existing vehicle display devices fail to maintain a consistent virtual image superimposition on the windshield scenery when the driver's viewpoint position changes, leading to discomfort due to shifting targets.
Innovation Solution
A vehicle display device that includes an image display unit, an image generating unit, and a viewpoint position acquiring unit, which determines the usage region on the display screen based on the driver's viewpoint position, adjusting both the position and size of the virtual image to maintain a constant superimposed distance range on the windshield scenery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the display image projection position is fixed, then the device structure is simple, but the virtual image superimposition position shifts when the driver's viewpoint changes, causing discomfort
Solution Approach 1:
The patent implements dynamic adjustment of the display image projection position based on the driver's viewpoint position. The control unit dynamically changes the projection position coordinates (Xu, Yu) according to detected viewpoint changes, making the system adaptive rather than static. This resolves the contradiction by allowing the projection position to move dynamically with the driver's viewpoint, maintaining comfortable superimposition without requiring complex mechanical adjustment mechanisms.
Solution Approach 2:
The patent employs a feedback mechanism where the viewpoint detection device continuously monitors the driver's viewpoint position and feeds this information to the control unit. The control unit then adjusts the projection position based on this feedback, creating a closed-loop system. This feedback approach maintains user comfort while keeping the overall device structure relatively simple, as it uses software-based control rather than complex mechanical systems.
2Ease of operation
If the projection position is adjusted according to viewpoint position, then user comfort is maintained, but the device complexity increases due to additional detection and control mechanisms
Solution Approach 1:
The patent replaces complex mechanical adjustment mechanisms with an electronic/image processing approach. Instead of using mechanical systems to physically move or redirect light paths based on viewpoint detection, the patent adjusts the projection position by modifying the displayed image coordinates through software control. This substitution of mechanical systems with electronic/image processing methods maintains user comfort while minimizing the increase in device complexity.
Solution Approach 2:
The patent changes the projection position parameters (coordinates Xu, Yu) based on the detected viewpoint position. By adjusting these numerical parameters through software rather than physical reconfiguration, the system maintains user comfort while avoiding the complexity of mechanical adjustment systems. The control unit calculates new projection coordinates and updates the display accordingly, keeping the hardware structure simple.
3Measurement precision
If the virtual image is projected to maintain constant superimposed distance range, then information accuracy is improved, but the projection position must change with viewpoint, increasing system complexity
Solution Approach 1:
The patent uses image processing and software control to maintain constant superimposed distance range instead of mechanical adjustment mechanisms. The control unit calculates the appropriate projection position changes based on viewpoint detection data, ensuring the virtual image remains accurately superimposed on the road surface at the correct distance. This software-based approach improves information accuracy while minimizing control mechanism complexity.
Solution Approach 2:
The patent adjusts the projection position parameters (Xu, Yu) dynamically to maintain constant superimposed distance range. By changing these numerical parameters based on viewpoint position, the system ensures accurate information presentation without requiring complex mechanical control systems. The control unit performs calculations and updates projection coordinates accordingly, keeping the control mechanism relatively simple while improving measurement precision.
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
This solution effectively prevents the shift of virtual image targets within the scenery, providing appropriate information to the driver without being influenced by changes in the driver's viewpoint position, thereby enhancing user experience and reducing discomfort.
Implementation Method 1
a projecting unit configured to project the image onto a light transmitting member of the vehicle so that, when the image is reflected on the light transmitting member of the vehicle, the user who sits on the driver's seat can visually recognize a virtual image
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
Provided is a vehicle display device capable of providing a user with appropriate information, without being affected by changes in the position of the viewpoint of the user. This vehicle display device (10) is provided with: an image display unit (20) having a display screen (21) capable of displaying images on at least a part thereof; an image generating unit (30) which generates images to be displayed by the image display unit (20); a viewpoint position acquiring unit (40) which acquires a viewpoint position (100) of a user seated on a driver's seat of a vehicle (1) ; and a projecting unit (50) which projects the images toward a transparent front windshield (2) of the vehicle (1) in such a way that the images are reflected in the transparent front windshield (2) of the vehicle (1), thereby allowing the user seated in the driver's seat to visually recognize a virtual image (310). The image generating unit (30) determines a usage region (220) to be used to display the images, within the display screen (21) of the image display unit (20), in accordance with the viewpoint position (100) of the user that has been acquired by the viewpoint position acquiring unit (40).