Vehicle Display Dimming Using Gaze Tracking for Power Savings
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Solution Overview
Problem
Existing vehicle display systems consume significant electrical power, impacting vehicle performance and reducing battery reserve, and known dimming technologies do not adequately account for driver habits and the complex relationship between brightness recognition and gaze duration.
Innovation Solution
A vehicle display system with gaze-tracking technology dynamically adjusts the brightness of display objects based on gaze frequency and duration, ensuring primary content remains visible while dimming secondary content until gazed at, and applying dynamic brightness boosts for rapid recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If display screens are kept at normal brightness continuously, then driver visibility and information recognition are maintained, but electrical power consumption increases significantly
Solution Approach 1:
The display system dynamically adjusts brightness levels based on real-time driver gaze detection. The controller continuously monitors whether the driver is looking at the display and transitions between bright and dim states accordingly, making the brightness adaptive rather than static. This resolves the contradiction by making brightness a dynamic parameter that responds to actual usage needs.
Solution Approach 2:
The system uses a camera or sensor to detect driver gaze direction and feeds this information back to the controller, which then adjusts display brightness accordingly. This closed-loop feedback mechanism ensures the display provides information when needed (when driver is looking) while conserving energy when not in use, resolving the trade-off between visibility and power consumption.
2Use of energy by moving object
If display screens are dimmed to reduce power consumption, then electrical power savings are achieved, but driver recognition time increases
Solution Approach 1:
The system performs preliminary actions by detecting driver gaze in advance and pre-adjusting display brightness before the driver actually needs to read the information. When the gaze detector identifies the driver is looking toward the display, the controller proactively brightens the screen, ensuring information is immediately visible without delay. This eliminates recognition time delays while maintaining energy savings during non-usage periods.
Solution Approach 2:
The system skips the intermediate dimmed state by directly transitioning to full brightness when driver gaze is detected. Rather than gradually increasing brightness or maintaining intermediate levels, the display rapidly switches from dim to bright state, rushing through the transition to ensure immediate information visibility, thus minimizing any potential recognition delay.
3Use of energy by moving object
If gaze tracking is used to control display dimming, then power consumption is reduced, but system complexity increases
Solution Approach 1:
The camera or sensor used for gaze tracking is integrated into the existing vehicle infrastructure, serving multiple functions such as driver monitoring, attention detection, and potentially other safety features. By making the gaze detection component multi-functional rather than dedicated solely to display control, the system reduces overall complexity while achieving power savings through intelligent dimming.
Solution Approach 2:
The display system uses the driver's own gaze behavior to automatically control its brightness without requiring external intervention or complex processing. The driver's natural eye movements serve as the control signal, and the system self-adjusts based on this input, eliminating the need for additional control interfaces or complex user interactions, thereby reducing system complexity.
Data Source
AI summary
A display system in a vehicle is operated to reduce power consumption by adaptively dimming display screens according to where a user is looking. The display system has a plurality of display objects each with a respective adjustable brightness. The passenger vehicle includes a gaze tracker evaluating an eye of a user to detect a gaze point where the user is looking. The gaze point is compared to locations of the display objects. A respective gaze frequency is determined for one or more of the display objects according to a number of times that the gaze point orients onto a respective display object. The adjustable brightness of the respective display object is adjusted according to the respective gaze frequency.