Dynamic Refresh Rate Control for Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile devices consume unnecessary power due to a fixed refresh rate, which does not consider the content being displayed, leading to redundant frame rates and decreased display quality.
Innovation Solution
An electronic device with a method to measure content rates by comparing current and previous frames, and controlling the refresh rate based on these measurements, using techniques like double buffering and grid-based comparison, to adjust the refresh rate dynamically and reduce power consumption without compromising picture quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the refresh rate is fixed at 60 Hz, then the display can maintain stable picture quality, but unnecessary power consumption occurs due to redundant frame updates
Solution Approach 1:
The patent applies dynamic refresh rate adjustment by comparing content change rates with refresh rates. The system dynamically selects from multiple refresh rates (e.g., 60Hz, 30Hz, 15Hz, 7.5Hz) based on whether frame changes occur, transitioning from a fixed 60Hz refresh rate to a dynamic adaptive refresh rate that matches actual content update needs, thereby reducing power consumption while maintaining picture quality
Solution Approach 2:
The patent changes the refresh rate parameter based on content characteristics. By measuring whether the current frame differs from the previous frame and adjusting the refresh rate accordingly (higher refresh rate when content changes, lower when static), the system optimizes the balance between picture quality and power consumption through parameter adaptation
2Use of energy by moving object
If the refresh rate is reduced to save power, then power consumption decreases, but display quality and smoothness are compromised
Solution Approach 1:
The patent dynamically adjusts the refresh rate parameter based on content change detection. When content changes are detected, the refresh rate is increased to maintain display quality; when content is static, the refresh rate is reduced to save power. This adaptive parameter adjustment ensures display quality is maintained only when necessary
Solution Approach 2:
The system implements dynamic refresh rate switching based on real-time content analysis. The refresh rate is not fixed but adapts dynamically to content characteristics, ensuring high display quality during content changes while achieving power savings during static display periods
3Use of energy by moving object
If the refresh rate is adjusted dynamically based on content, then power consumption is optimized, but system complexity increases
Solution Approach 1:
The patent segments the display update process into distinct phases: content change detection (comparing current and previous frames), content rate calculation, and refresh rate selection. This segmentation allows the complex adaptive refresh rate control to be implemented through modular, manageable steps, reducing overall system complexity
Solution Approach 2:
The system implements a feedback mechanism where the display controller continuously monitors frame changes and adjusts the refresh rate accordingly. This closed-loop feedback control automatically optimizes power consumption based on actual content needs without requiring complex manual configuration or user intervention
Data Source
AI summary
The present invention relates to an electronic device and a method for managing power in the electronic device that can control the refresh rate to reduce power consumption. An embodiment of the invention provides a method for managing power in an electronic device that includes: measuring a content rate of a displayed content; and controlling a refresh rate based on the content rate.