Dynamic Display Refresh Control for Mobile Energy Efficiency
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Solution Overview
Problem
Current mobile computing devices face challenges in controlling the refresh frequency of their display units, leading to issues such as image blinking, dithering, and increased energy consumption, as they often operate at a constant refresh frequency without considering real-time frame composition requirements.
Innovation Solution
A method and device that dynamically adjust the refresh frequency of the display unit based on real-time frame composition frequency, using a processor to acquire and determine the optimal refresh frequency, and refresh the screen accordingly, incorporating a real-time frame composition frequency acquiring module, a refresh frequency determining module, and a display unit refreshing module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the refresh frequency of the display unit is increased to reduce image blinking and dithering, then display stability is improved, but energy consumption and computing resource occupation increase
Solution Approach 1:
The patent applies dynamics by making the refresh frequency adjustable rather than fixed. The system dynamically changes the refresh frequency based on real-time frame composition frequency, allowing it to adapt between high refresh rates (for stability) and low refresh rates (for energy saving) depending on current display needs
Solution Approach 2:
The patent changes the parameter of refresh frequency based on measured frame composition frequency. By monitoring how frequently frames are actually composed and adjusting the refresh frequency accordingly, the system optimizes the balance between display stability and energy consumption
2Reliability
If the refresh frequency is set to the maximum available to ensure smooth display of dynamic images, then image quality is improved, but computing device performance requirements increase
Solution Approach 1:
The system dynamically adjusts refresh frequency based on actual frame composition needs rather than maintaining a constantly high refresh rate. This reduces the performance burden on the computing device while maintaining image quality when needed
Solution Approach 2:
The patent implements feedback by measuring the real-time frame composition frequency and using this information to adjust the refresh frequency. This closed-loop control ensures the display unit operates at the minimum necessary performance level to maintain image quality
3Reliability
If a constant high refresh frequency is used to prevent image blinking, then display stability is improved, but power consumption increases
Solution Approach 1:
The system uses periodic measurement of frame composition frequency to determine appropriate refresh rates. Instead of maintaining constant high refresh, it periodically assesses needs and adjusts accordingly, reducing power consumption while maintaining stability when required
Solution Approach 2:
The refresh frequency parameter is changed based on measured frame composition frequency. The system transitions between different refresh rate levels depending on actual display needs, optimizing the balance between stability and power consumption
Data Source
AI summary
A method, device and non-transitory computer-readable medium for control of a refresh frequency of a display unit are disclosed. The display unit is in communication with a processor and configured to display image frames processed by the processor on a screen of the display unit. The method includes: acquiring a real-time frame composition frequency corresponding to an amount of time required for the processor to complete composition of an image frame to be displayed; determining a refresh frequency of the display unit based on the real-time frame composition frequency, when the real-time-frame composition frequency satisfies a preset condition; and refreshing the screen of the display unit at the determined refresh frequency.