Windshield Image Projection with Viewer-State Correction
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Solution Overview
Problem
Existing automotive devices face issues with image distortion and color casts on curved windshields due to varying viewer angles, failing to provide optimal viewing quality for different users.
Innovation Solution
An automotive device that determines the primary viewer's state through facial recognition and eye tracking, providing content and gamma correction signals to adjust images for clear projection on the windshield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If images are projected onto a curved windshield, then the driver can view information such as navigation maps and vehicle status, but image distortion and color casts occur
Solution Approach 1:
The system performs preliminary actions by determining the primary viewer state (driver or front-seat passenger) before generating the display signal. This allows the system to pre-adjust the image content and projection parameters according to the detected viewer position, preventing image distortion and color casts before they occur
Solution Approach 2:
The system changes projection parameters based on the detected primary viewer state. When a front-seat passenger is detected, the system adjusts the projection angle, image position, and color temperature to compensate for the curved windshield's optical distortion, thereby maintaining image quality while preserving viewing convenience
2Adaptability or versatility
If the windshield has a curvature to allow wide viewing angle, then multiple users can view the projection, but image distortion and color casts are exacerbated
Solution Approach 1:
The system implements dynamic adaptation by continuously detecting the primary viewer state and adjusting projection parameters in real-time. This dynamic approach allows the system to maintain optimal image quality for different viewing angles and positions, accommodating both driver and front-seat passenger views without suffering from static projection limitations
Solution Approach 2:
The system applies local quality adjustment by modifying specific regions of the projected image based on the detected viewer position. When a front-seat passenger is detected, the system adjusts the image content and projection characteristics specifically for that viewer's location, providing optimized image quality for each viewing zone while maintaining overall system versatility
Data Source
AI summary
A method for an automotive device to project an image onto a windshield for viewing by a primary viewer is provided. The method includes the following steps. The primary viewer state is determined. The corresponding content correction signal and the corresponding gamma correction signal are output according to the primary viewer state. A corresponding display signal is generated according to the corresponding content correction signal and the corresponding gamma correction signal. The image is displayed according to the display signal. The image is projected onto the windshield.