Display Refresh Segmentation for Flicker-Free Low Power
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Solution Overview
Problem
The reduction of refresh frequency in displays to conserve power leads to screen flicker and increased power consumption, as existing methods fail to efficiently manage display updates without affecting user experience.
Innovation Solution
A method that detects unchanged display content and alternately updates display data across portions of display units in rows or columns, reducing the number of pixels updated while maintaining the original refresh frequency, thereby minimizing power consumption and avoiding screen flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If refresh frequency is reduced to conserve power, then power consumption decreases, but screen flicker occurs and user experience deteriorates
Solution Approach 1:
The display screen is divided into multiple regions (first region, second region, third region, fourth region) arranged in a checkerboard pattern. Instead of refreshing all pixels uniformly, the system segments the refresh operation into alternating updates of different regions, reducing the overall refresh burden while maintaining visual stability through the persistence of vision effect.
Solution Approach 2:
The system implements periodic alternating updates of different display regions. In odd-numbered refresh cycles, the first and third regions are updated; in even-numbered refresh cycles, the second and fourth regions are updated. This periodic action distributes the refresh load over time, reducing peak power consumption while maintaining the perception of continuous display through the human visual system's temporal integration.
2Illumination intensity
If all display data is updated at full refresh frequency, then display quality is maintained, but power consumption increases
Solution Approach 1:
The system applies partial action by updating only a subset of display regions (50% of pixels) at each refresh cycle instead of all pixels. The alternating update pattern ensures that over two cycles, all regions receive updates, maintaining overall display quality while reducing instantaneous power consumption and heat generation during each individual refresh operation.
Data Source
AI summary
A display method, device and a computer-readable medium are provided. The method includes: detecting whether there is any change in a displayed content for the display; in response to detecting that the displayed content for the display does not change, controlling the display to alternately update display data corresponding to a first portion and a second portion of display units in each row when the display unit comprises m rows of pixels; and in response to detecting that the displayed content for the display does not change, controlling the display to alternately update display data corresponding to a third portion and a fourth portion of display units in each column when the display unit comprises n columns of pixels. Herein m and n are positive integers. Thus, screen flicker caused by reduction of refresh frequency of a display while the display content does not change can be avoided.