Digital Side Mirror Control Using Driver Gaze for Power Saving
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Solution Overview
Problem
Digital side mirrors in vehicles continuously consume power, leading to rapid battery discharge and reduced driving distance due to constant operation, despite not being actively used by the driver.
Innovation Solution
A vehicle system that includes a driver sensor to detect gaze direction, adjusting the frame rate and screen brightness of side cameras and displays based on driver attention and predicted needs, optimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital side mirrors operate continuously at peak performance, then image quality and responsiveness are improved, but power consumption increases and battery charge decreases
Solution Approach 1:
The system dynamically adjusts camera frame rate and display screen brightness based on real-time detection of driver gaze direction. When the driver looks at the display, the system provides peak performance (high frame rate and brightness). When the driver looks away, the system reduces performance levels to conserve power, thus resolving the contradiction between maintaining image quality and reducing power consumption.
Solution Approach 2:
The invention changes operational parameters (frame rate and screen brightness) based on driver behavior patterns. The controller monitors gaze direction and adjusts parameters accordingly - increasing them when needed for safety and decreasing them during periods when the driver is not observing the display, thereby optimizing the balance between reliability and energy consumption.
2Reliability
If digital side mirrors operate at peak performance continuously, then monitoring capability is improved, but driving distance is reduced due to power consumption
Solution Approach 1:
The system implements periodic monitoring of driver gaze direction and adjusts camera and display operations accordingly. Instead of continuous peak performance operation, the system alternates between high-performance mode (when driver needs monitoring information) and low-power mode (when driver is not looking at display), extending battery life and driving distance while maintaining safety when needed.
3Reliability
If frame rate and screen brightness are increased for better visibility, then driver awareness is improved, but power consumption increases
Solution Approach 1:
The system uses driver sensor data as feedback to determine when high performance is needed. The controller continuously monitors driver gaze direction and uses this feedback to adjust camera frame rate and display brightness levels. This closed-loop control ensures high driver awareness only when the driver is actually observing the display, minimizing unnecessary power consumption.
Data Source
AI summary
A vehicle includes a driver sensor provided inside the vehicle and configured to obtain a face image of a driver; a side camera configured to obtain images of a rear left side and a rear right side of the vehicle; a display configured to output the images of the rear left side and the rear right side of the vehicle; and a controller electrically connected to the driver sensor, the side camera, and the display; wherein the controller is configured to identify a gaze direction of the driver based on the face image of the driver, and adjust at least one of a frame rate of the side camera or a screen brightness of the display based on the gaze direction of the driver.