Vehicle Display Pre-Activation to Reduce Reset Voltage Drop
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Solution Overview
Problem
Vehicle information display apparatuses take a long time to activate, causing user irritation, and are prone to resets when the engine is started, especially in limited spaces like two-wheeled vehicles, where hardware solutions increase cost and size.
Innovation Solution
A vehicle information display apparatus that activates before the engine is started by using a control unit to switch between power-saving and normal modes, reducing activation time and preventing resets through a trigger signal detected before engine start, and utilizing a reset prevention circuit that minimizes cost and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the display is started immediately when the engine key switch is turned on, then the activation waiting time is shortened, but the apparatus is reset due to voltage drop from starter activation current
Solution Approach 1:
The system performs preliminary actions by detecting the trigger signal (door lock or key insertion) before engine start and pre-loading necessary data and initializing the display apparatus. This preparation work is completed in advance so that when the engine starts, the display can immediately show required information without needing full system initialization, thus avoiding reset while reducing waiting time.
Solution Approach 2:
The activation process is divided into multiple stages: pre-activation phase (before engine start) where basic initialization occurs, and post-activation phase (after engine start) where full functionality is enabled. This segmentation allows the system to perform critical functions before the voltage drop occurs while deferring non-critical functions until after stabilization.
2Reliability
If hardware measures such as increased battery capacity or capacitors are mounted to prevent reset, then reset prevention is improved, but cost and device size increase
Solution Approach 1:
The patent replaces the mechanical/electrical hardware solution (capacitors, increased battery capacity) with a control-based software solution. The control unit manages power consumption and timing of operations to prevent reset without requiring additional hardware components, thus reducing device complexity and cost while maintaining reliability.
Solution Approach 2:
The system uses its own control unit to monitor voltage conditions and automatically adjust its operation to prevent reset. The control unit detects when voltage drop is likely to occur and proactively manages system state to avoid reset conditions, making the system self-regulating without external hardware assistance.
3Use of energy by moving object
If the screen remains dark before engine start, then power consumption is reduced, but user irritation increases due to delayed information display
Solution Approach 1:
When a trigger signal is detected (door lock or key insertion), the system performs preliminary activation to display essential vehicle information before the engine starts. This pre-display of critical information improves user convenience without requiring full system power, balancing energy consumption with user needs.
Solution Approach 2:
The display system uses different display modes for different situations: a power-saving mode with limited display functions when the trigger signal is detected but engine is not started, and a full-function normal mode after engine start. This local quality adjustment optimizes the balance between power consumption and information display based on the specific operational context.
Data Source
AI summary
A vehicle information display apparatus that shortens an activation waiting time is obtained. The vehicle information display apparatus includes a display unit that displays vehicle information utilized in a vehicle and a control unit that controls contents displayed on the display unit; the control unit makes display control for the vehicle information operate in a power-saving mode where functions are limited, when the trigger signal is detected, and makes the display control for the vehicle information operate in a normal mode where functions are not limited, when the engine has been started completely.