Vehicle Display Power Segmentation During Main Power Abnormality

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Solution Overview

Problem

Vehicular electronic control units face challenges in maintaining operations during abnormal main power conditions, requiring a solution that prioritizes safety use information display while minimizing unnecessary power consumption and costs.

Innovation Solution

The vehicular drawing device incorporates a first and second operating system, circuit block groups, and separate power circuits, with a controller circuit that maintains sub power supply to safety use circuit block groups and terminates comfort use power in case of main power abnormalities, preventing leakage current and unnecessary consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate power circuits are provided for safety use and comfort use, then reliability is improved, but device complexity increases

Engineering Contradiction:

Improveoperation continuity during power abnormalityVSAvoidpower circuit configuration

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The power supply system is segmented into two independent power circuits: a first power circuit supplying sub-power to safety-use electronic control units, and a second power circuit supplying main-power to comfort-use electronic control units. This segmentation ensures that safety-critical systems remain operational even when the main power source fails, thereby improving reliability without requiring a complete system redesign.

Inventive Principle:

Principle #1Segmentation

2Duration of action of moving object

If sub power is supplied to safety use circuit block groups during main power abnormality, then operation duration is improved, but power consumption increases

Engineering Contradiction:

Improveoperation duration during power abnormalityVSAvoidpower consumption from sub battery

Core Design Contradiction:

Duration of action of moving objectVSUse of energy by moving object

Solution Approach 1:

Different power supply strategies are applied to different circuit block groups based on their functional importance. Safety-use circuit block groups receive sub-power to maintain critical operations, while comfort-use circuit block groups are disconnected to minimize power consumption. This localized quality differentiation extends operation duration during power abnormalities without unnecessarily increasing overall power consumption.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of supplying power to all circuit block groups during main power abnormality, the system selectively supplies sub-power only to safety-use circuit block groups that require continuous operation. This partial action approach extends the operational duration of critical systems while avoiding the excessive power consumption that would result from maintaining all non-critical systems.

Inventive Principle:

Principle #16Partial or excessive action

3Loss of energy

If comfort use circuit block groups are disconnected during main power abnormality, then loss of energy is reduced, but adaptability decreases

Engineering Contradiction:

Improvepower leakage and unnecessary consumptionVSAvoidsystem response to different power conditions

Core Design Contradiction:

Loss of energyVSAdaptability or versatility

Solution Approach 1:

The power supply configuration is made dynamic through the controller circuit, which automatically detects power source abnormalities and adjusts power distribution in real-time. During normal operation, both safety-use and comfort-use circuit block groups receive power. When main power abnormality is detected, the controller dynamically reconfigures the system to supply sub-power only to safety-use circuits, thereby reducing energy loss while maintaining adaptability through automatic adjustment.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The controller circuit continuously monitors the operational status of both power circuits and uses this feedback to determine when to switch between normal and abnormal power supply modes. This feedback mechanism ensures that comfort-use circuit block groups are disconnected only when necessary (during main power abnormalities), minimizing energy loss while preserving system adaptability through intelligent, condition-based control.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12095588B2Vehicular drawing device

Publication Date: 2024.09.17 DENSO CORP

AI summary

A vehicular drawing device includes a first operating system, a second operating system, a first circuit block group, a second circuit block group, a first power circuit, a second power circuit, and a controller circuit. The first circuit block group is used in the first operating system. The second circuit block group is used in the second operating system. The first power circuit is configured to supply a sub power to the first circuit block group. The second power circuit is provided separately from the first power circuit, and the second power circuit is configured to supply a main power to the second circuit block group. In response to the main power being abnormal, the controller circuit is configured to (i) maintain supplying of the sub power from the first power circuit to the first circuit block group and (ii) terminate an operation of the second power circuit.