Vehicle Display Switching for Faster Rear-View Camera Activation
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Solution Overview
Problem
Existing vehicle information display systems take too long to activate the rear-view camera when a vehicle is about to be driven backward, requiring specialized hardware and software to shorten activation time, which increases costs and design effort.
Innovation Solution
A vehicle information display device that includes an image processing unit, a display switching unit, and an environment determination unit, which predicts backward movement based on inputs from front-view cameras, vehicle speed sensors, and in-vehicle cameras, activating the rear-view camera and starting image processing in advance to promptly display images on the screen when the shift lever is moved to the reverse position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the rear-view camera is activated only when the shift lever is moved to reverse position, then power consumption is reduced and device complexity is minimized, but the activation time becomes too long for prompt image display
Solution Approach 1:
The system performs preliminary actions by predicting backward movement occurrence in advance using environment determination (analyzing front-view camera images, vehicle speed, and driver behavior). When backward movement is predicted, the rear-view camera and image processing unit are activated before the shift lever is actually moved to reverse position, thereby shortening activation time without requiring dedicated hardware
2Loss of time
If dedicated software or hardware is used to shorten activation time of the rear-view camera, then activation speed is improved, but design effort and cost increase
Solution Approach 1:
The system activates the rear-view camera and image processing unit in advance based on predicted backward movement occurrence, eliminating the need for dedicated hardware or specialized software designed solely for rapid activation. This approach achieves fast activation using existing general-purpose components
Solution Approach 2:
The system uses existing sensors and processing units (front-view camera, vehicle speed sensor, in-vehicle camera, image processing unit) to predict backward movement and trigger rear-view camera activation. These existing components serve multiple functions, eliminating the need for dedicated activation hardware
3Loss of time
If the rear-view camera remains activated continuously, then activation time is reduced to zero, but power consumption increases and contradicts the goal of reducing dark current
Solution Approach 1:
The system activates the rear-view camera only when backward movement is predicted in advance, rather than keeping it continuously activated. This on-demand activation based on prediction reduces power consumption while still achieving prompt image display when needed
Solution Approach 2:
The system uses periodic monitoring of environmental conditions (front-view camera images, vehicle speed, driver behavior) to detect when backward movement is likely to occur, triggering camera activation only at appropriate intervals rather than continuously
Data Source
AI summary
A vehicle information display device 100 includes: an environment determination unit (115) that predicts an occurrence of a backward movement of a vehicle based on an output from an environment information acquisition unit, an image processing unit (121) that receives an image captured by a camera and generates an image to be displayed on a display screen, and a display switching unit that switches a display of a monitor screen provided in a vehicle in accordance with a traveling status of the vehicle. When the environment determination unit (115) predicts an occurrence of a backward movement, the image processing unit (121) starts image processing for the backward movement in advance, and When the user performs the backward movement operation, the output image from the image processing unit is displayed on the display screen.