Vehicle Display Control for Adaptive Steering Grip Prompts
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Solution Overview
Problem
Existing vehicle display systems frequently annoy occupants by conspicuously requesting them to grip the steering wheel, leading to discomfort when the need is not urgent.
Innovation Solution
A vehicle display control system that adjusts the prominence of steering wheel grip requests based on the urgency of the need, making the requests more conspicuous when switching from autonomous to manual driving or approaching events, and less conspicuous when driving autonomously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inducement image is displayed prominently to ensure the occupant grips the steering wheel, then the reliability of mode switching is improved, but the occupant experiences annoyance and discomfort
Solution Approach 1:
The display control device dynamically adjusts the display characteristics of the inducement image based on the autonomous driving continuation period. As the autonomous driving continues without manual intervention, the display control unit increases the prominence of the inducement image gradually, rather than maintaining a fixed display state. This dynamic adjustment ensures reliable mode switching when needed while minimizing occupant annoyance during extended autonomous operation.
Solution Approach 2:
The system changes display parameters (brightness, size, position, or animation intensity) of the inducement image based on the elapsed time of autonomous driving. The display control unit modifies these parameters in response to the autonomous driving continuation period, making the inducement image more prominent as time progresses. This parameter adjustment resolves the contradiction by adapting the display to different operational contexts.
2Object-affected harmful factors
If the inducement image is displayed less prominently to reduce occupant annoyance, then the comfort is improved, but the effectiveness of requesting steering wheel grip is reduced
Solution Approach 1:
The system employs dynamic display control where the inducement image's prominence increases progressively as the autonomous driving continuation period extends. This ensures that when the system needs reliable grip confirmation (after extended autonomous operation), the inducement image becomes sufficiently prominent to effectively request steering wheel grip, while maintaining lower prominence during brief autonomous periods to reduce annoyance.
Solution Approach 2:
The display control unit begins showing the inducement image before the autonomous driving mode is terminated, and gradually increases its prominence over the continuation period. This preliminary action with progressive intensification ensures that the occupant is prepared for potential mode switching while minimizing initial annoyance, resolving the effectiveness-comfort contradiction.
3Reliability
If the inducement image is constantly displayed prominently to ensure continuous awareness, then the safety is improved, but the occupant experiences increased annoyance and distraction
Solution Approach 1:
Instead of constant prominent display, the system uses periodic or progressive display activation based on the autonomous driving continuation period. The inducement image is displayed with increasing prominence at specific intervals or thresholds during autonomous operation, maintaining safety awareness while reducing continuous visual distraction to the occupant.
Solution Approach 2:
The display control unit dynamically adjusts the inducement image prominence based on real-time autonomous driving duration. The image transitions from low or no prominence during brief autonomous periods to higher prominence as the continuation period extends, ensuring safety monitoring without causing continuous distraction during short autonomous operations.
Data Source
AI summary
A vehicle display control device, includes a memory; and a processor coupled to the memory. The processor is configured to cause a display unit provided in a vehicle cabin to display an inducement image requesting that an occupant grip a steering wheel in a case in which it is necessary for the occupant to grip the steering wheel, and cause the display unit to display the inducement image more prominently in a case of requesting that the occupant grip the steering wheel before the vehicle switches from an autonomous driving mode to a manual driving mode as the vehicle is continuing to drive autonomously, than in a case of requesting that the occupant continue to grip the steering wheel as the vehicle is continuing to drive autonomously.