Vehicle Head-Up Display with Dynamic Gaze Tracking
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Solution Overview
Problem
Conventional head-up displays in vehicles project information at a fixed position, requiring drivers to look down or turn their head to view, and are affected by vehicle vibrations, leading to decreased usability and image quality.
Innovation Solution
A head-up display system with an eye-tracking device that pre-locates the driver's initial gaze position and adjusts the projection image in real-time to match the driver's current gaze position, using a processor to control a projector to project the image at the appropriate position, ensuring the information remains visible without distracting the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a head up display projects images at a fixed position, then the device structure is simple, but the driver cannot directly obtain information when gaze position changes and must look down or turn head
Solution Approach 1:
The patent implements dynamic projection position adjustment by tracking the driver's gaze position in real-time. The projection position is no longer fixed but dynamically changes according to where the driver is looking, ensuring information remains within the driver's field of view without requiring additional mechanical components or complex structural changes
Solution Approach 2:
The system uses eye tracking technology to detect the driver's gaze position and feeds this information back to the projection system. This closed-loop feedback mechanism allows the display to automatically adjust its projection position based on the driver's actual viewing direction, improving information accessibility while maintaining system simplicity
2Reliability
If a head up display uses a fixed projection position, then the device complexity is low, but vibration causes projection position deviation from expected position over time
Solution Approach 1:
The system continuously monitors the driver's gaze position and adjusts the projection position accordingly, creating a feedback loop that compensates for vibrations and positional drift. This ensures the projection remains accurately positioned relative to the driver's view without requiring complex active stabilization mechanisms
Solution Approach 2:
By making the projection position dynamic rather than fixed, the system can adapt to vibrations and positional changes in real-time. The projection position automatically adjusts to maintain accuracy relative to the driver's gaze, eliminating the need for complex vibration compensation hardware
Data Source
AI summary
A head up display system for a vehicle is provided, including an eye tracking device and a head up display device. The eye tracking device is configured to pre-locate an initial gaze position of a driver of the vehicle before the vehicle starts moving and to detect a gaze position of the driver in real time. The head up display device includes a projector and a processor. The processor is coupled to the eye tracking device and the projector. The processor compares the gaze position with the initial gaze position, and controls the projector to project a display image to a first projection position or a second projection position according to a comparison result, wherein the first projection position corresponds to the initial gaze position and the second projection position corresponds to the gaze position. A control method of a head up display system is also provided.