Head-Up Display Eye-Height Calibration for Accurate Superimposition
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Solution Overview
Problem
Existing head-up display systems face deviations in superimposition between the real view and virtual image due to changes in the driver's eye height, requiring adjustments in the reflection mirror's tilt angle, which can lead to positional deviations.
Innovation Solution
A head-up display system that adjusts the virtual image position based on the observer's eye height by increasing the display area's vertical width, using a light source and a controller to calibrate the image position, and employing a transparent member to guide light for accurate superimposition on the windshield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the reflection mirror's tilt angle is adjusted to change the superimposed area, then the superimposed display area can be changed, but the depression angle of the virtual image changes causing deviation in superimposition between the real view and virtual image
Solution Approach 1:
The patent separates the control of display area and image position into independent mechanisms: the reflection mirror controls only the display area, while a dedicated position adjustment mechanism (prism or lens) controls the image position, eliminating the coupling that causes superimposition deviation
Solution Approach 2:
The patent introduces an intermediary position adjustment mechanism (prism or lens) between the reflection mirror and the windshield to compensate for image position deviations caused by mirror rotation, acting as a mediator that corrects the superimposition accuracy
2Adaptability or versatility
If the reflection mirror is rotated to adjust the superimposed area, then the display area can be changed, but a deviation occurs in the superimposition between the real view of the outside world and the virtual image
Solution Approach 1:
The patent implements dynamic adjustment of both the reflection mirror tilt angle (for display area) and the position adjustment mechanism (for image position), allowing the system to adapt to different eye heights while maintaining reliable superimposition alignment through coordinated control
Solution Approach 2:
The patent uses eye position detection to provide feedback for controlling both the reflection mirror and position adjustment mechanism, enabling the system to automatically maintain accurate superimposition alignment while adjusting the display area according to the observer's eye height
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 reduces superimposition deviations between the real and virtual views by allowing precise adjustment of the virtual image position according to the observer's eye height, ensuring a stable and accurate display.
Implementation Method 1
the light flux emitted from the display part is reflected by the window part and reaches a visually recognizable area where the observer can visually recognize the virtual image
Implementation Method 2
the light emitted from the light source part is reflected inside an area where the light flux is reflected by the window part and reaches the visually recognizable area, and the virtual image and the light from the light source part are superimposed
Data Source
AI summary
A head-up display system displays a virtual image superimposed on a real view that can be visually recognized through a window part. The head-up display system includes a display part, an optical system, a light source part, an operation part, and a controller. The controller controls a display area of the display part in accordance with an operation of the operation part by the observer. The light flux emitted from the display part is reflected by the window part and reaches a visually recognizable area where the observer can visually recognize the virtual image. The light emitted from the light source part is reflected inside an area where the light flux is reflected by the window part and reaches the visually recognizable area. The virtual image and the light from the light source part are superimposed, and can be visually recognized.