Display Refresh Rate Control Using Motion and Luminance Cues
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic devices consume unnecessary power when displaying images with small motions at high refresh rates, despite providing a sense of liveliness at high FPS.
Innovation Solution
The method controls the refresh rate based on the frames per second (FPS) and motion information of each scene, adjusting the refresh rate to match the image content, reducing power consumption without degrading image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the refresh rate is set to a high value to provide a sense of liveliness for images with large motion, then the image quality and smoothness are improved, but the power consumption increases unnecessarily for images with small motion
Solution Approach 1:
The refresh rate is made dynamic rather than fixed, allowing the display to adjust between different refresh rates (e.g., 60Hz, 120Hz) based on the motion characteristics of the displayed content. This enables the system to provide high refresh rates only when necessary for motion-heavy content while using lower refresh rates for static or low-motion content, thereby reducing power consumption while maintaining image quality when needed.
Solution Approach 2:
The patent changes the parameter of refresh rate based on motion information analysis. By analyzing motion vectors or frame differences between consecutive frames, the system determines the appropriate refresh rate to match the content requirements, avoiding unnecessary high refresh rates for low-motion content and thus reducing power consumption.
2Use of energy by moving object
If the refresh rate is dynamically adjusted based on motion information, then the power consumption is reduced, but the system complexity increases
Solution Approach 1:
Instead of analyzing every single frame or using complex algorithms, the patent applies a simplified motion detection approach that processes only key frames or uses threshold-based motion detection. This partial action approach reduces the computational overhead and system complexity while still achieving effective refresh rate adjustment for power savings.
3Use of energy by moving object
If the refresh rate is set to match the FPS of the image, then the power consumption is reduced for static images, but the sense of liveliness is lost for dynamic images
Solution Approach 1:
The system uses feedback from motion information analysis to continuously adjust the refresh rate. By monitoring motion characteristics in real-time and comparing them against thresholds or historical data, the system can dynamically switch between refresh rates to maintain the sense of liveliness for dynamic content while saving power for static content.
Data Source
AI summary
An electronic device includes a display, and at least one processor. The at least one processor is configured to obtain an image; identify whether or not the luminance of the display equals to or is higher than a predetermined luminance; when the luminance of the display equals to or is higher than the predetermined luminance, identify the FPS of the image and the motion information of a scene of the image to be displayed by means of the display, and determine a refresh rate of the display based on the FPS of the image and the motion information of the scene; and, when the luminance of the display is lower than the predetermined luminance, determine a refresh rate corresponding to the FPS of the image as the refresh rate of the display, and display the scene of the image by means of the display based on the determined refresh rate.