Head-Up Display Calibration Using Driver Eye Tracking Graphics
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Solution Overview
Problem
Current head-up display calibration methods are costly and time-consuming due to the need for re-boresighting and updated distortion maps at the assembly plant, caused by vehicle build and windscreen shape variations.
Innovation Solution
A head-up display system that includes a driver monitoring system with cameras to determine the driver's eye location, a graphic projection module to generate alignment and distortion graphics on the windscreen, and controllers to guide the calibration process, allowing for on-site calibration at a dealership or by the customer without special equipment, using gamified rewards for motivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If re-boresighting and updated distortion maps are performed at the assembly plant, then calibration precision is improved, but manufacturing cost and cycle time increase
Solution Approach 1:
The system enables the driver to perform calibration themselves using the head-up display as a guide, eliminating the need for specialized equipment and personnel at the assembly plant. The driver follows on-screen instructions to complete boresighting and distortion mapping, making the process self-service oriented.
Solution Approach 2:
The patent replaces complex mechanical calibration equipment with a software-based graphical interface displayed on the windscreen. The head-up display shows alignment graphics and distortion patterns that guide the driver through calibration, substituting physical calibration tools with visual information.
2Manufacturing precision
If re-boresighting and updated distortion maps are performed at the assembly plant, then calibration precision is improved, but cycle time increases
Solution Approach 1:
The driver completes calibration independently during vehicle setup, eliminating the need for dedicated calibration time in the assembly process. This self-service approach allows calibration to be performed outside the critical manufacturing path.
Solution Approach 2:
The system performs calibration after the vehicle is assembled and delivered to the customer, rather than before. This preliminary action (from the customer's perspective) removes calibration from the assembly plant's critical path, effectively decoupling it from manufacturing cycle time.
3Manufacturing precision
If traditional calibration methods are used, then calibration accuracy is achieved, but device complexity and cost increase
Solution Approach 1:
The head-up display serves multiple functions: it provides normal driving information and simultaneously serves as the calibration interface. The same display hardware used for navigation and vehicle data also presents alignment graphics and distortion patterns, eliminating the need for separate calibration equipment.
Solution Approach 2:
The head-up display acts as an intermediary between the calibration system and the driver. Instead of directly interacting with complex calibration hardware, the driver interacts with simple graphical elements displayed on the windscreen, which mediate the calibration process.
Data Source
AI summary
A head-up display system for displaying graphics upon a windscreen of a vehicle to provide a driver with a gamified experience includes a driver monitoring system including one or more cameras that determine a location of a head of the driver of the vehicle and an eye location of the driver, a graphic projection module for generating images upon the windscreen of the vehicle, and one or more controllers in electronic communication with the driver monitoring system and the graphic projection module. The controller executes instructions to instruct the graphic projection module to generate a vertical alignment graphic upon the windscreen of the vehicle. The vertical alignment graphic indicates when the eye location of the driver is positioned at a nominal height of an eyebox of the head-up display.