Vehicle Rear Window Display System for Driver State Adaptation
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Solution Overview
Problem
Existing vehicle display systems fail to optimize the content of displays on rear windows based on whether the driver is checking the rear area, leading to potential legibility issues for both the driver and other vehicles.
Innovation Solution
A vehicle display system that includes sensors to determine the driver's state, such as a driver sensor and vehicle-exterior sensors, and a controller to adjust the display content and location on the rear window based on whether the driver is checking the rear area, using a HUD device with self-luminous interlayer film or other display technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a display is provided on the rear window without optimizing based on driver state, then the display structure is simple, but the legibility for the driver and other vehicles deteriorates
Solution Approach 1:
The display device dynamically changes its display state based on the driver's rearward viewing state. When the driver is viewing the rear area, the display device activates or changes content to ensure legibility for both the driver and other vehicles. This dynamic adaptation resolves the contradiction by making the display system responsive to real-time conditions rather than static
Solution Approach 2:
The system uses a driver state determiner to detect whether the driver is viewing the rear area, and this detection feedback controls the display device's operation. The feedback loop ensures the display only activates or changes when appropriate, improving legibility while avoiding unnecessary complexity from continuous monitoring and display changes
2Reliability
If the display content is changed based on driver state, then the legibility for the driver is improved, but the complexity of determining driver state increases
Solution Approach 1:
The driver state determiner acts as an intermediary component that simplifies the detection of driver state. Rather than complex direct monitoring, the system uses this dedicated component to interpret driver behavior (such as head position or gaze direction) and translate it into control signals for the display device, making the overall system more manageable
Data Source
AI summary
A vehicle display system includes a display device, a driver state determiner, and a display controller. The display device is configured to provide a display on a window in a rear portion of a vehicle. The driver state determiner is configured to determine whether a driver of the vehicle checks a rear area of the vehicle. The display controller is configured to control displaying of the display device to change the display provided by the display device in accordance with a determination result of the driver state determiner.