Head-Up Display Mirror Angle and Distance Adjustment
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Solution Overview
Problem
Existing head-up display (HUD) systems, particularly augmented reality (AR)-enabled HUDs, face challenges in maintaining visibility and suitability of virtual images when vehicles vibrate or incline, as they struggle to effectively overlap virtual images with actual scenery, leading to reduced workability of the AR function.
Innovation Solution
A head-up display apparatus that includes a vehicle information acquisition unit, a controller, a video image display, a mirror, a mirror driver, and a display distance adjusting mechanism, which adjusts the mirror angle and display distance to ensure the virtual image is suitably overlapped with actual scenery, regardless of vehicle conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a head-up display projects a video image onto a windshield to create a virtual image, then the driver can recognize information without moving the line of sight, but the virtual image cannot be properly overlapped with actual scenery when the vehicle vibrates or inclines
Solution Approach 1:
The patent applies dynamics by making the display position adaptive rather than fixed. The controller dynamically adjusts the position of the video image on the windshield based on real-time vehicle state information (acceleration, angular velocity, steering angle) to maintain proper overlap with actual scenery despite vehicle vibrations and inclines.
Solution Approach 2:
The patent implements feedback by using vehicle state sensors (acceleration sensor, angular velocity sensor, steering angle sensor) to continuously monitor vehicle conditions and feed this information back to the controller, which then adjusts the display position accordingly to maintain accurate overlay of virtual and real scenery.
2Adaptability or versatility
If the display position is adjusted to maintain overlap with actual scenery, then the AR function workability improves, but the system complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The patent applies universality by using a multi-functional controller that performs both the AR display control and the position adjustment based on vehicle state. The controller integrates multiple functions (display control, sensor data processing, position calculation, and actuation control) into a single device, reducing overall system complexity despite the added adaptability requirements.
Solution Approach 2:
The patent merges the vehicle state sensing system with the head-up display system, combining previously separate functions into an integrated system. The acceleration sensor, angular velocity sensor, and steering angle sensor data are combined with the display control to achieve coordinated adjustment of virtual image position.
3Measurement precision
If multiple sensors are added to detect vehicle state for display adjustment, then the display accuracy under varying vehicle conditions improves, but the device complexity and cost increase
Solution Approach 1:
The patent applies segmentation by dividing the vehicle state detection into multiple independent sensing functions (acceleration detection, angular velocity detection, steering angle detection), each handled by a dedicated sensor. This modular approach allows for precise measurement of different vehicle parameters while maintaining system organization and manageability.
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 system effectively displays virtual images overlapped with actual scenery, maintaining visibility and suitability even under varying vehicle conditions, thereby enhancing the AR function's workability.
Implementation Method 1
a mirror (52) and a mirror driver (50) which changes an angle of the mirror (52); wherein the controller (20) adjusts the angle of the mirror (52)
Data Source
AI summary
A head-up display apparatus displays a virtual image suitably overlapped with actual scenery in accordance with a running condition of a vehicle. The head-up display apparatus acquires various kinds of vehicle information which can be detected by a vehicle and the display of the video image is based on the vehicle information. A mirror is configured to reflect the video image formed by the video image display to project onto the windshield. A mirror driver is configured to change an angle of the mirror and a display distance adjusting mechanism is configured to adjust a display distance of the virtual image with respect to the driver. The angle of the mirror is adjusted via the mirror driver based on the vehicle information such that the virtual image can be displayed with respect to the driver to be overlapped with the scenery.