Windshield HUD Arrow Orientation for Navigation Misregistration
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Solution Overview
Problem
Conventional head-up displays (HUDs) suffer from overlay misregistration and loss of display objects due to low-precision maps or sensors, leading to user discomfort and potential misguidance during navigation.
Innovation Solution
A display device that controls the yaw and roll angles of display objects based on path point attributes, shaping them as short arrows pointing to the navigation direction, with adjustable lateral, depth, and height positions, and dynamic designs to enhance visibility and reduce misregistration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional HUD displays navigation images using standard projection methods, then the display can show navigation information, but overlay misregistration and loss of display objects occur due to low-precision maps or sensors
Solution Approach 1:
The display device dynamically adjusts the inclination angles (yaw and roll) of the display object based on the vehicle's navigation path and position. This dynamic adaptation allows the display to maintain accurate orientation and position on the road surface despite variations in map precision or sensor accuracy, preventing overlay misregistration and ensuring reliable navigation guidance.
Solution Approach 2:
The system changes the geometric parameters of the display object, specifically the yaw angle and roll angle, to match the navigation path attributes. By adjusting these parameters based on path point information, the display maintains proper alignment with the road surface and navigation direction, resolving overlay misregistration issues caused by low-precision maps or sensors.
2Ease of operation
If the display object is shaped as a long arrow to indicate navigation direction, then the direction is clear, but the display object may extend beyond the visible range and be lost partially
Solution Approach 1:
The display object's inclination is dynamically adjusted based on the navigation path attributes. By controlling the yaw and roll angles to match the path direction, the display maintains an optimal orientation that ensures the entire navigation indicator remains within the visible range while clearly indicating the navigation direction.
Solution Approach 2:
The display device uses an asymmetric arrow shape that is inclined at specific angles rather than a symmetric or straight configuration. This asymmetric inclination allows the display to fit within the visible range while maintaining clear directional indication, resolving the conflict between direction clarity and full visibility.
3Ease of manufacture
If the display object is inclined at fixed angles, then the display is simple to implement, but it cannot adapt to different navigation path attributes and causes misregistration
Solution Approach 1:
The display system transitions from fixed inclination angles to dynamic angle adjustment based on navigation path attributes. The control circuit calculates appropriate yaw and roll angles from path point information and adjusts the display object accordingly, enabling adaptation to different navigation scenarios while maintaining implementation feasibility through automated control.
Solution Approach 2:
The system uses feedback from navigation path data to continuously adjust the display object's inclination angles. By monitoring path attributes and adjusting the display accordingly, the system achieves adaptability to different navigation scenarios while maintaining a relatively simple implementation through automated feedback control.
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
Reduces overlay misregistration and loss of display objects, alleviating user discomfort and ensuring accurate navigation guidance by maintaining display objects within visible ranges and adapting to vehicle speed and navigation reliability.
Implementation Method 1
a projector that projects light representing the display object in the mode of inclination determined by the control circuit onto a display medium provided in a vehicle, to cause the light to be reflected off the display medium toward a user in the vehicle
Data Source
AI summary
A display device includes a controller that determines the mode of inclination of a display object that is an image shaped to point to one direction, and a drawing unit that projects light representing the display object in the mode of inclination determined by the controller onto a windshield to cause the light to be reflected off the windshield toward a user in the vehicle to enable the user to visually recognize the display object in the mode of inclination as a virtual image through the windshield. The controller determines the mode of inclination of the display object that points to the one direction as a navigation direction, by controlling yaw and roll angles of the display object depending on the attribute of a path point that is set on the path to navigate the vehicle to a destination.