Dash Cam Parking Mode Power Switching for Lower Current Draw
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Solution Overview
Problem
The existing driving video recording systems consume significant current in parking recording mode, reducing battery life due to continuous video recording and event detection sensor operations.
Innovation Solution
The system separates power and data signal lines for the capturing unit and event detection sensor, with a control unit managing power supply to minimize current consumption by turning off the capturing unit and turning on the event detection sensor only when an event is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous video recording is performed in parking recording mode, then video recording function is maintained, but current consumption increases significantly
Solution Approach 1:
The system switches from continuous recording to event-triggered periodic recording. The capturing unit operates only when events are detected by the event detection sensor or G-sensor, rather than continuously. This periodic operation mode maintains video recording reliability when needed while dramatically reducing current consumption during normal parking periods.
Solution Approach 2:
The system dynamically adjusts the operating state of the capturing unit based on detected events. The capturing unit transitions between powered-off and powered-on states according to real-time sensor inputs, optimizing the balance between recording reliability and energy consumption rather than maintaining a static continuous operation mode.
2Reliability
If event detection sensor is built into the camera and always powered on, then event detection function is maintained, but current consumption increases
Solution Approach 1:
The system segments the power supply control for different functional units. The event detection sensor has its own independent power control that is separate from the capturing unit's power control. This allows the event detection sensor to be powered on only when events are detected, maintaining detection reliability while reducing overall current consumption by isolating and selectively activating individual functional segments.
3Reliability
If capturing unit is always powered on for video recording, then video quality is maintained, but battery life is reduced
Solution Approach 1:
The capturing unit operates in a periodic manner rather than continuously. Video recording is performed periodically when events are detected, maintaining video quality reliability for important moments while extending battery life by avoiding continuous operation. The system captures high-quality video only when necessary rather than depleting battery through constant recording.
Data Source
AI summary
Disclosed is a driving video recording system. A driving video recording system includes a camera that includes a capturing unit capturing a video, an event detection sensor detecting an event, and a camera connector for interfacing with a main body, and a main body that includes an image processing unit receiving and processing an image captured by the capturing unit, a power supply unit supplying power for an operation of the driving video recording system, a control unit controlling an operation of the power supply unit, and a main body connector for interfacing with the camera. The control unit controls the power supply unit to turn off the power supply to the capturing unit in a parking recording mode and to turn on the power supply to the event detection sensor.