Hybrid Vehicle Display Control for Flicker-Free Engine Status
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Solution Overview
Problem
Conventional display devices in hybrid vehicles often experience image flickering due to varying control circumstances, which can confuse occupants about the operation state of the engine or motor.
Innovation Solution
A display device with a display unit and a display control unit that shows a predetermined image indicating engine operation, continuing to display this image during regeneration by the electric motor and operation requests, regardless of the engine's operation state, and determining whether to stop displaying the image based on the engine's operation state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display unit shows images indicating engine operation based on real-time operation state, then the information accuracy is improved, but image flickering occurs due to frequent state changes during regeneration and operation requests
Solution Approach 1:
The display control unit determines in advance whether to maintain image display during regeneration and operation request periods. By pre-establishing display maintenance rules for these specific conditions, the system prevents flickering before it occurs, ensuring stable visual information during transient operational states.
Solution Approach 2:
The display control strategy dynamically adjusts based on vehicle operation conditions. The system switches between different display modes: maintaining display during regeneration and operation requests to prevent flickering, while updating display based on actual operation state during normal conditions. This dynamic adaptation resolves the contradiction between accuracy and stability.
2Loss of time
If the display control unit continuously updates the image based on engine operation state, then the information freshness is improved, but the flickering problem worsens during regeneration and operation requests
Solution Approach 1:
The display control unit applies periodic update behavior with conditional pauses. During normal operation, the display updates periodically according to operation state changes. During regeneration and operation requests, the system intentionally pauses updates to maintain display stability, then resumes periodic updates after these periods end, balancing freshness and stability.
Solution Approach 2:
The system pre-determines display maintenance strategies for anticipated conditions like regeneration and operation requests. By having predetermined rules ready for these specific scenarios, the system can maintain display stability during these periods while still providing timely information updates after the periods conclude.
3Loss of energy
If the display shows the predetermined image only when the engine operates with fuel consumption, then the energy efficiency is improved, but the information completeness deteriorates during regeneration and operation requests
Solution Approach 1:
The display control unit applies different display quality standards to different operational contexts. During regeneration and operation requests, the system maintains image display locally for these specific conditions despite the engine not operating with fuel consumption, ensuring information completeness. During normal operation, the system follows energy-efficient update patterns, creating localized exceptions where needed.
Data Source
AI summary
A display device is a device mounted on a vehicle including an engine, and an electric motor connected to a drive wheel, the display device including: a display unit capable of displaying a predetermined image indicating that the engine operates; and a display control unit configured to cause the display unit to display the predetermined image when the engine operates with fuel consumption, in which, when regeneration by the electric motor is performed and an operation request for causing the engine to operate occurs, the display control unit causes the display unit to display the predetermined image regardless of an operation state of the engine.