Vehicle Display Drawer Control During Ignition-Off Stopping

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Solution Overview

Problem

In vehicular apparatuses, the stopping sequence is incomplete when the ignition is turned off, leading to delayed or incorrect display operations upon restarting, due to unfinished program execution and power voltage fluctuations.

Innovation Solution

A vehicular apparatus with a drawer, input device, and maintainer that maintains the operating state of the drawer until predetermined ending conditions are met, ensuring the completion of the stopping sequence and reducing the likelihood of display faults by continuing the execution of necessary drawings during vehicle stopping.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the ignition is turned off to stop the vehicle, then the vehicle stops operation, but the stopping sequence becomes incomplete and display operations are delayed or incorrect upon restarting

Engineering Contradiction:

Improvestopping sequence completionVSAvoiddisplay operation delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system performs preliminary actions by detecting the ignition off state and proactively maintaining the drawer's operating state before the stopping sequence is complete. This allows the drawer to remain operational and ready to execute drawing operations immediately upon restart, preventing display delays and ensuring complete stopping sequence execution.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the drawer operating state is maintained after ignition is turned off, then drawing operations can be executed correctly during stopping, but power voltage fluctuations occur

Engineering Contradiction:

Improvedisplay operation correctnessVSAvoidpower voltage fluctuation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system uses feedback by continuously monitoring the ignition state and power voltage conditions. When the ignition is detected as off, the system adjusts its behavior to maintain the drawer's operating state, and when power voltage drops are detected, the system lifts the operating state appropriately. This feedback mechanism ensures correct display operations while responding to power voltage fluctuations.

Inventive Principle:

Principle #23Feedback

3Use of energy by moving object

If the drawer operating state is lifted immediately when ignition is turned off, then power consumption is reduced, but the stopping sequence becomes incomplete and display faults occur

Engineering Contradiction:

Improvepower consumptionVSAvoidstopping sequence execution

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The system applies dynamics by making the drawer's operating state adjustable rather than fixed. The operating state is dynamically maintained when the ignition is off to ensure complete stopping sequence execution, and dynamically lifted when power voltage drops or the ending condition is met. This dynamic approach balances power consumption with reliable stopping sequence execution.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12125325B2Vehicular apparatus

Publication Date: 2024.10.22 DENSO CORP

AI summary

A vehicular apparatus includes a drawer, an input device, functional devices and a maintainer. The drawer executes drawing on a display device. The input device receives a signal indicating an operation for stopping a vehicle. The maintainer maintains the drawer at an operating state to execute drawing required during stopping of the vehicle in response to that the input device receives the signal indicating the operation for stopping the vehicle, and lifts the operating state of the drawer based on a condition that a predetermined ending condition is satisfied.