Head-Up Display Projector Alignment via Laser Reference
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Solution Overview
Problem
Current methods for aligning head-up display projectors in vehicles are complex, time-consuming, and expensive, requiring the windshield to be removed for precise positioning, which is inefficient and costly.
Innovation Solution
A method using a gauge with lasers and reference points directly attached to the projector, allowing for precise alignment without removing the windshield, where lasers are used to align with reference points inside the vehicle to achieve the target position, enabling quick and cost-effective installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a gauge with optical sensor and beam splitter is used to determine projector position, then measurement precision is improved, but device complexity and time consumption increase due to requiring windshield removal
Solution Approach 1:
The patent replaces complex mechanical measurement systems (gauge with optical sensors and beam splitters requiring windshield removal) with a laser-based alignment system. The laser device projects reference lines that can be directly observed through the windshield, eliminating the need for mechanical gauges and windshield removal while maintaining alignment precision.
Solution Approach 2:
The patent extracts the essential alignment function from the complex gauge system and implements it separately as a laser device that can operate independently. The laser device contains only the necessary components (laser source, housing with opening) to perform alignment, separating the alignment function from the windshield removal requirement.
2Ease of operation
If windshield is removed for gauge installation, then measurement accessibility is improved, but loss of time and increase in costs occur due to reinstallation requirements
Solution Approach 1:
The laser device is designed to be self-contained and portable, requiring no installation on the windshield or vehicle structure. The device can be positioned and operated independently, with the laser beams passing through the existing windshield to provide alignment references, making the system self-sufficient and eliminating time-consuming installation/removal cycles.
3Manufacturing precision
If multiple lasers are used to determine actual position, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the alignment task into multiple independent laser beams, each providing a specific reference line for different alignment dimensions. Each laser operates independently and provides a simple linear reference, and the combination of these segmented reference lines achieves comprehensive three-dimensional alignment without requiring a single complex measurement system.
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 allows for precise and efficient alignment of the projector, reducing alignment time and costs by eliminating the need to remove the windshield, ensuring accurate and clear projection of data onto the windshield.
Implementation Method 1
an actual position of the projector is determined with the aid of at least one laser, preferably with the aid of two or more lasers
Data Source
AI summary
The invention relates to a method for aligning a head-up display projector (14) with a teaching with a built-in windshield and a device for carrying out the method.