Vehicle Display Control for Hands-On Off Mode Transition
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Solution Overview
Problem
In automated driving systems, drivers face difficulty in recognizing whether they need to switch to a hands-on or hands-off mode when the vehicle transitions from a low automation level requiring monitoring to a higher level not requiring monitoring, as existing display configurations cannot effectively differentiate between these modes.
Innovation Solution
A vehicle display control system that includes a display control unit and a mode identification unit to differentiate the display of a surrounding state image based on whether the vehicle is in hands-on or hands-off mode, providing distinct visual cues to the driver during transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the vehicle uses a unified display configuration for surrounding state images, then the system structure remains simple, but the driver cannot distinguish between hands-on and hands-off modes during automation transitions
Solution Approach 1:
The patent applies local quality by differentiating the display characteristics of surrounding state images based on the automation mode. Specifically, the display control unit adjusts image attributes (such as brightness, contrast, or overlay information) according to whether the vehicle is in hands-on or hands-off mode, making the display content locally adapted to the current operational context without changing the overall system structure
Solution Approach 2:
The patent implements parameter changes by modifying display parameters of the surrounding state images based on the identified automation mode. The mode identification unit determines the current mode, and the display control unit accordingly adjusts parameters such as image brightness, color intensity, or information overlay density, enabling the driver to distinguish between modes through perceptible parameter variations
2Loss of information
If the vehicle provides detailed visual cues to differentiate automation modes, then driver recognition improves, but the display system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the display control function into distinct operational segments corresponding to different automation modes. The mode identification unit segments the automation levels into hands-on and hands-off categories, and the display control unit applies different information presentation strategies for each segment, ensuring appropriate information is provided without overwhelming the driver
Solution Approach 2:
The patent implements inversion by reversing the conventional approach: instead of providing different information for different modes and hoping drivers notice, the system provides a unified base display and uses subtle parameter variations (inversion of the differentiation strategy) to indicate mode changes. This reduces information overload while maintaining distinguishability
Data Source
AI summary
A vehicle switches from a without-monitoring-duty automated driving without a duty of monitoring by a driver to a with-monitoring-duty automated driving with the duty of monitoring by the driver. A display control unit causes a display device to display a surrounding state image that shows a surrounding state of the vehicle. A mode identification unit identifies whether automated driving in a hands-on mode, which requires gripping of a steering wheel of the vehicle, or automated driving in a hands-off mode, which does not require gripping of the steering wheel, is performed when the vehicle is in the with-monitoring-duty automated driving. The display control unit differentiates display of the surrounding state image, when the vehicle switches from the without-monitoring-duty automated driving to the with-monitoring-duty automated driving, depending on whether the mode identification unit identifies the automated driving in the hands-on mode or the automated driving in the hands-off mode.