Vehicle Display Markings for Curve-Based Deceleration Awareness

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Solution Overview

Problem

In vehicles equipped with driving assistance devices that automatically control acceleration and deceleration, occupants may experience anxiety during deceleration as they are not clearly informed of the reason for the deceleration.

Innovation Solution

A vehicle display device that acquires information about the degree of curvature of the travel lane and determines if deceleration is required based on the lane curvature and vehicle speed. The device then displays a predetermined marking superimposed along the travel lane inside the vehicle cabin to inform the occupant of impending deceleration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If automatic acceleration and deceleration control is implemented, then driving assistance is improved, but occupant awareness of deceleration reason deteriorates

Engineering Contradiction:

Improveautomatic acceleration and deceleration controlVSAvoidoccupant awareness of deceleration reason

Core Design Contradiction:

Extent of automationVSLoss of information

Solution Approach 1:

The patent segments information presentation by using different visual markers for different purposes: a first marker indicates the need for deceleration, while a second marker indicates the specific reason (such as a curve). This segmentation allows the system to maintain automation while providing differentiated information to the occupant.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs preliminary action by displaying the first marker before deceleration occurs, warning the occupant in advance that deceleration is needed. This allows the occupant to mentally prepare for the automatic control action, reducing the information gap created by automation.

Inventive Principle:

Principle #10Preliminary action

2Loss of information

If visual markers are displayed superimposed on the travel lane, then occupant awareness of deceleration is improved, but visibility of the travel lane may deteriorate

Engineering Contradiction:

Improveoccupant awareness of decelerationVSAvoidvisibility deterioration of travel lane

Core Design Contradiction:

Loss of informationVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by positioning markers at specific locations rather than uniformly across the display. The first marker is placed in connection with the travel lane to indicate deceleration need, while the second marker is placed outside the travel lane to indicate the reason, optimizing information delivery without obscuring the lane.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system transitions from two-dimensional overlay to three-dimensional spatial arrangement by placing markers at different positions in the visual field. The second marker is positioned outside the travel lane area, creating a spatial separation that prevents visibility obstruction while maintaining information delivery.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS12327475B2Vehicle display device, vehicle display system, vehicle display method, and non-transitory storage medium storing a program

Publication Date: 2025.06.10 TOYOTA JIDOSHA KK

AI summary

A vehicle display device, includes: a curve information acquisition section configured to acquire information relating to a degree of curvature of a travel lane; a deceleration determination section configured to determine whether or not deceleration of a vehicle is required based on the degree of curvature of the travel lane and a vehicle speed; and a marking display section configured to, in a case in which deceleration is required, cause a display device to display a predetermined first marking superimposed along the travel lane at a display region inside a vehicle cabin.