HUD Diaphragm Calibration Using Integrated Positioning Marks
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Solution Overview
Problem
Existing head-up display calibration methods are costly and cumbersome, requiring separate calibration panels outside the vehicle and complex setups with robotic arms, which are inefficient and difficult to implement.
Innovation Solution
A diaphragm with transparent regions for positioning marks and a mirror is used to capture calibration images directly through the windshield, allowing for image position correction by determining positional deviations between marks and patterns, eliminating the need for external calibration panels and simplifying the calibration process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external calibration panels and robotic arms are used for head-up display calibration, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The calibration target is extracted from the external environment and integrated directly into the diaphragm assembly. The diaphragm now contains both the aperture for positioning and the calibration target, eliminating the need for separate external calibration panels and reducing setup complexity while maintaining calibration accuracy.
Solution Approach 2:
The diaphragm combines multiple functions: it serves as both the positioning aperture holder and the calibration target carrier. By merging the calibration target with the diaphragm structure, the system reduces the number of components and simplifies the calibration setup while preserving measurement precision.
2Measurement precision
If external calibration panels are positioned outside the vehicle, then calibration accuracy is maintained through long optical paths, but ease of operation and setup time deteriorate
Solution Approach 1:
The calibration target is moved from the external horizontal plane to an internal vertical plane on the diaphragm. This dimensional change allows the calibration target to be positioned within the vehicle's interior space, making setup easier while the optical path length is maintained through the vertical arrangement of components.
3Measurement precision
If multiple separate components are used for calibration (calibration panel, diaphragm, robotic arm), then measurement precision is improved, but ease of manufacture and cost worsen
Solution Approach 1:
The calibration target is integrated directly onto the diaphragm, combining what were previously separate components (calibration panel and diaphragm) into a single manufactured unit. This reduces the number of parts that need to be manufactured, assembled, and calibrated separately, thereby improving ease of manufacture and reducing costs while maintaining position detection accuracy.
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 approach simplifies the calibration process by using the diaphragm to capture images of the head-up display projections, allowing for accurate image position correction within the vehicle, reducing costs and complexity, and enabling easier setup and operation.
Implementation Method 1
a second image including the second positioning mark and a second positioning pattern output on the vehicle side, mirrored by a mirror of the disk, and recorded through the disk
Data Source
AI summary
A diaphragm for performing image position correction of a virtual image projectable onto a windshield of a vehicle by a head-up display. A first positioning mark, a second positioning mark, and a calibration mark are attached to a disk of the diaphragm. The disk is transparent at least in the region of the first positioning mark, the second positioning mark, and the calibration mark, so that a first image including the first positioning mark and a first positioning pattern recorded directly through the disk and output on the vehicle side, a second image including the second positioning mark and a second positioning pattern output on the vehicle side, mirrored by a mirror of the diaphragm and recorded through the disk.