Rear Vehicle Hazard Display for Failure and Behavior Notification

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Solution Overview

Problem

Existing systems fail to provide clear and understandable information from a host vehicle to a following vehicle regarding potential hazards or failures, leading to potential risks for the following vehicle.

Innovation Solution

An information notification device equipped with a failure information detection unit and a notification control unit that uses a display in the host vehicle to visually convey failure information and behavior information to the following vehicle, adjusting display positions based on the driver's position and increasing display units for higher risk levels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If light or sound is emitted from the host vehicle to the following vehicle for notification, then the following vehicle can be alerted of potential dangers, but the notification lacks specific content making it difficult for the driver to grasp the meaning

Engineering Contradiction:
Improvenotification effectivenessVSAvoidinformation clarity
Core Design Contradiction:
ReliabilityVSLoss of information

Solution Approach 1:

The patent introduces a display device as an intermediary between the host vehicle's failure detection system and the following vehicle's driver. Instead of using ambiguous light or sound signals, the display visually presents specific failure information and behavior information, making the notification content clear and understandable while maintaining reliable alerting functionality.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Loss of information

If a display is used in the host vehicle to show failure information to the following vehicle, then information clarity is improved, but the display position must be optimized based on driver position to ensure visibility

Engineering Contradiction:
Improveinformation clarityVSAvoiddisplay control complexity
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The patent implements dynamic display position adjustment based on the detected driver position. The notification control unit changes the display position of failure information according to where the driver is sitting, ensuring optimal visibility without requiring complex manual configuration. This dynamic adaptation resolves the contradiction by automatically optimizing information presentation while managing system complexity through automated control.

Inventive Principle:
Principle #15Dynamics

3Loss of information

If the number of display units is increased for high risk levels, then information completeness is improved, but device complexity and energy consumption increase

Engineering Contradiction:
Improveinformation completenessVSAvoiddisplay system complexity
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The patent applies partial action by selectively activating the number of display units based on risk level. For low risk levels, fewer display units are used, while for high risk levels, more display units are activated to provide complete information. This approach ensures information completeness when needed while avoiding unnecessary complexity and energy consumption during normal operation.

Inventive Principle:
Principle #16Partial or excessive action

Data Source

PatentUS12562060B2Information notification device and information notification method
Publication Date: 2026.02.24 TOYOTA JIDOSHA KK
  • US12562060B2 patent drawing
  • US12562060B2 patent drawing
  • US12562060B2 patent drawing

AI summary

The information notification device includes a failure information detection unit that detects failure information that affects traveling of the host vehicle when the host vehicle is traveling, and a notification control unit that notifies the succeeding vehicle of at least one of the failure information and the behavior information related to the behavior of the host vehicle caused by the failure information via a display provided in the host vehicle so as to be visually recognized from the succeeding vehicle located behind the host vehicle.