Head-Up Display Virtual Image Alignment via Dynamic Angle Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional head-up display devices have a fixed angle between virtual images, which can lead to misalignment with the actual scene due to vehicle and road surface conditions, diminishing the stereoscopic impression.
Innovation Solution
A head-up display device with an angle varying unit and control unit that adjusts the angle and position of virtual images to maintain alignment with the actual scene, using a rotary drive unit and attitude detector to adjust the reflector and display positions based on vehicle attitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the angle between virtual images is fixed, then the device structure is simple, but the virtual image becomes misaligned with the actual scene due to vehicle and road surface conditions
Solution Approach 1:
The patent applies the dynamics principle by making the angle between virtual images adjustable rather than fixed. The control unit varies the angle formed by the first and second virtual image displayable areas based on detected vehicle pitch angles, allowing the system to adapt to changing vehicle attitudes and road conditions, thereby maintaining accurate alignment between virtual images and the actual scene.
Solution Approach 2:
The patent implements parameter changes by modifying the angle parameter between virtual images in response to vehicle pitch angle variations. The control unit adjusts this angle parameter dynamically based on sensor data, enabling the display system to compensate for vehicle attitude changes and maintain proper alignment with the road surface and actual scene.
2Reliability
If the angle between virtual images is adjusted to match the actual scene, then the alignment with the actual scene is improved, but the relative positional relationship of virtual images may become misaligned
Solution Approach 1:
The patent applies feedback by using an attitude detector to sense vehicle pitch angles and feeding this information back to the control unit. The control unit then adjusts the angle between virtual images based on this feedback, creating a closed-loop control system that continuously maintains accurate alignment between virtual images and the actual scene while preserving proper relative positional relationships.
Solution Approach 2:
The patent replaces mechanical adjustment mechanisms with electronic control and software-based angle variation. Instead of physically moving display components, the system uses a control unit to digitally adjust the angle between virtual image displayable areas based on detected vehicle attitudes, achieving precise alignment without complex mechanical systems.
3Reliability
If the position of virtual images is changed to maintain alignment, then the misalignment of relative positional relationship is suppressed, but the device requires more complex control mechanisms
Solution Approach 1:
The patent implements universality by using a single control unit that performs multiple functions: detecting vehicle pitch angles, calculating appropriate angle adjustments, varying the angle between virtual image displayable areas, and adjusting virtual image positions. This multi-functional approach maintains alignment stability without requiring separate complex control mechanisms for each function.
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 device displays virtual images more suitable for the actual scene, reducing misalignment and line of sight movement, even with changing vehicle pitch angles.
Implementation Method 1
an optical element for transmitting one of the two display lights, and reflecting the other display light
Implementation Method 2
a magnifying mirror for expanding while reflecting the two display lights passing through this optical element toward the windshield
Data Source
AI summary
A head-up display (HUD) device displays a first virtual image in an area in which the first virtual image can be displayed, and displays a second virtual image in an area in which the second virtual image can be displayed. The HUD device includes: a rotation driving unit which changes an angle formed between the area in which the first virtual image can be displayed, and the area in which the second virtual image can be displayed; and a control unit which performs virtual image angle adjustment processing for adjusting the angle using the rotation driving unit, and, when performing the virtual image angle adjustment processing, virtual image position changing processing in which the position of the second virtual image in the area in which the second virtual image can be displayed is changed to inhibit deviation in the relative positional relationship between the first and second virtual images.