Eyelid Detection Power Saving for Display Flicker Reduction
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Solution Overview
Problem
The existing power-saving methods for live view displays in imaging devices, such as digital cameras, result in flickering due to a time lag between detecting the end of blinking and reflecting the processing on the screen, leading to increased power consumption and user discomfort.
Innovation Solution
A display device and method that includes a detecting unit to identify the closed state of a user's eyelid, initiating power-saving processing and restarting image processing when a specific time has elapsed after eyelid closure, thereby minimizing power consumption and flickering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the screen display is turned OFF during blinking to reduce power consumption, then power consumption is reduced, but a black image may be displayed when the user opens their eyes causing flickering
Solution Approach 1:
The system performs preliminary detection of eyelid closure state before completely turning off the display. By detecting the closed state in advance and using this information to control the display timing, the system ensures that the display is restored before the user opens their eyes, preventing flickering while maintaining power savings during actual blinking.
Solution Approach 2:
The system uses feedback from the detection unit that monitors eyelid closure state to control the display timing. The control unit continuously receives detection results and adjusts the display on/off timing accordingly, creating a closed-loop control system that adapts to the user's blinking pattern to prevent flickering.
2Use of energy by stationary object
If the screen display is turned OFF immediately upon detecting eyelid closure, then power consumption is reduced, but there is a time lag causing the display to appear after the user opens their eyes
Solution Approach 1:
The system performs preliminary detection of eyelid closure state before completely turning off the display. By detecting the closed state in advance and using this information to control the display timing, the system ensures that the display is restored before the user opens their eyes, preventing flickering while maintaining power savings during actual blinking.
Solution Approach 2:
The system dynamically adjusts the display timing based on the detected eyelid closure state. Instead of using a fixed delay, the control unit responds to real-time detection results, making the display control adaptive and dynamic to match the user's actual blinking pattern, thereby reducing unnecessary time lag.
3Manufacturing precision
If image processing is continuously performed during blinking, then image quality is maintained, but power consumption increases
Solution Approach 1:
The system applies periodic action by suspending image processing during detected blinking periods and resuming it when the eyelid closure ends. This periodic on/off pattern of image processing aligns with the user's blinking rhythm, reducing overall power consumption while maintaining image processing quality during active viewing periods.
Solution Approach 2:
The system extracts and separates the image processing function from continuous operation, removing it during blinking periods when it is not needed. By taking out the image processing activity during specific time windows (blinking), the system reduces power consumption without affecting the overall image quality experience during active viewing.
Data Source
AI summary
A display device according to one embodiment of the present disclosure acquires time series images; processes the acquired images; performs control so that a processed image is displayed on a display; detects a closed state of an eyelid of a user; and starts power saving processing to reduce power consumption of the image processing or the displaying, in response to the detection of the closed state of the eyelid, and instructs restart of processing that was being performed before the power saving processing, in the image processing or the displaying, at a timing when a specific time has elapsed from the detection of the closed state of the eyelid.