Vehicle Display Control for Continuous Driver State Awareness
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Solution Overview
Problem
Conventional vehicle information systems only notify drivers of potential accidents when the risk level exceeds a threshold, leaving drivers unaware of their current driving state and risk level during the absence of warnings, leading to a lack of tension and potentially unsafe driving conditions.
Innovation Solution
A vehicle-mounted display system that continuously displays a reference graphic representing the driver's current state and accident risk level, derived from parameters such as spare attentiveness level and risk level, allowing drivers to intuitively understand their driving state and risk at all times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If warning information is only displayed when risk level exceeds threshold, then false alarms are reduced, but driver awareness of current driving state is lost
Solution Approach 1:
The system continuously provides feedback to the driver through a reference graphic that displays the relationship between driving state and risk level. This feedback mechanism allows the driver to maintain awareness of their current driving state without triggering false alarms, as the graphic shows the actual risk level relative to the threshold rather than providing discrete warnings only when exceeded.
Solution Approach 2:
The reference graphic serves as an intermediary between the risk assessment system and the driver. Instead of directly notifying the driver only when risk exceeds threshold (which causes information loss), the graphic mediates by visually representing the relationship between driving state and risk level, allowing the driver to understand their current state without triggering unnecessary warnings.
2Loss of information
If continuous warning information is provided, then driver awareness of driving state is maintained, but driver distraction increases
Solution Approach 1:
The reference graphic utilizes color changes to convey different risk levels and driving states. By encoding information in color variations rather than through continuous textual or numerical displays, the system maintains driver awareness while minimizing distraction, as color perception is rapid and requires minimal cognitive processing.
Solution Approach 2:
The system provides partial information through the reference graphic - showing the relationship between driving state and risk level without providing all possible details about vehicle status. This partial action approach maintains sufficient driver awareness while avoiding the distraction that would result from displaying excessive information.
3Device complexity
If threshold-based warning system is used, then system complexity is reduced, but driver understanding of risk level is insufficient
Solution Approach 1:
The system transitions from a one-dimensional threshold-based warning approach to a two-dimensional representation in the reference graphic. The graphic displays both driving state and risk level dimensions simultaneously, allowing drivers to understand their current risk level and driving state relationship without increasing system complexity, as the graphic is generated through software processing of existing sensor data.
Data Source
AI summary
In a vehicle-mounted display system, a spare attentiveness level deriving part derives a spare attentiveness level that is a parameter determined according to a state of a driver of a vehicle at a present moment and a risk level deriving part derives a risk level that is a parameter determined according to a risk level of an accident at the present moment. Then a display continuously displays a driving state mark that is a reference graphic, determined according to the spare attentiveness level and the risk level, while the driver is driving the vehicle. Therefore, the driver can continuously understand the own state and the risk level of an accident at the present moment.