In-Vehicle Power Control for Passenger On-Off Audio Activation
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Solution Overview
Problem
Existing vehicle power supply systems face inefficiencies in reducing power consumption and ensuring timely activation of components like audio and image output devices, particularly during vehicle startup and shutdown, which can lead to delayed service provision and compromised safety functions.
Innovation Solution
An in-vehicle device that switches between power supply modes, including a 'getting-on' mode to pre-activate necessary components before the vehicle system starts and a 'getting-off' mode to maintain power to audio and image output devices until the passenger exits, optimizing power usage and ensuring safety functions are maintained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is supplied to all components when the vehicle power supply is shut down, then safety functions are maintained, but power consumption increases
Solution Approach 1:
The patent segments the power supply system into multiple output devices (audio output device, image output device, other devices) and selectively controls power supply to each device based on safety requirements. During the period when the vehicle power supply is shut down, only the audio output device receives power to maintain essential safety functions, while other devices are powered off to reduce power consumption.
2Loss of time
If power is supplied to the audio output device during vehicle startup, then service activation is quick, but power is wasted when not needed
Solution Approach 1:
The patent applies preliminary action by supplying power to the audio output device in advance during the period from when the trigger of a passenger getting on the vehicle is detected until the vehicle power supply is powered on. This ensures the audio output device is ready for immediate use when needed, reducing service activation time. Power is cut off during periods when the device is not needed to prevent energy waste.
3Reliability
If power is supplied to the image output device during vehicle shutdown, then safety monitoring is maintained, but power consumption increases
Solution Approach 1:
The patent segments power supply control between the image output device and audio output device. The image output device is powered off during the period when the vehicle power supply is shut down, while the audio output device remains powered to maintain essential safety functions. This selective segmentation reduces power consumption while preserving critical safety capabilities.
Data Source
AI summary
An in-vehicle device to be mounted on a vehicle including an audio output device configured to output audio and an image output device configured to output an image supplies power to the audio output device during a first period from when a trigger of a passenger getting on the vehicle is detected until when first operation of powering on a power supply of the vehicle is performed, and supplies power to the audio output device and the image output device during a second period from when second operation of shutting down the power supply of the vehicle is performed until when the passenger getting off the vehicle is detected.