Display Driver Refresh Rate Queue for Lower Screen Power
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Solution Overview
Problem
Conventional adaptive refresh rate technologies fail to distinguish running scenarios accurately, leading to increased power consumption due to inability to reduce the refresh rate when scenarios cannot be distinguished, especially in cases where adaptability between the electronic device and applications is low.
Innovation Solution
Implement a dynamic refresh rate queue configuration for the display driver integrated circuit (DDIC) with refresh rates arranged from high to low, allowing the display driver to adaptively reduce the refresh rate based on the image sending frequency of the upper-layer system, thereby preventing unnecessary image refreshing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional adaptive refresh rate technology switches refresh rate based on application running scenario, then power consumption can be reduced in distinguishable scenarios, but refresh rate cannot be reduced in undistinguishable scenarios leading to increased unnecessary power consumption
Solution Approach 1:
The patent implements a dynamic refresh rate queue mechanism where the DDIC can adaptively adjust refresh rates in real-time based on actual image sending frequency from the upper-layer SF, rather than relying on static scenario classification. The system dynamically monitors whether SF sends images and automatically switches between different refresh rates in the queue, enabling effective power management even when running scenarios cannot be distinguished.
Solution Approach 2:
The system establishes a feedback mechanism where the display driver continuously monitors the image sending frequency from the upper-layer SF and uses this information to control refresh rate adjustments. When SF does not send images, the system receives feedback and automatically reduces the refresh rate, creating a closed-loop control system that adapts to actual display needs regardless of scenario distinguishability.
2Speed
If display screen operates at high refresh rate, then display smoothness is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic action by creating a refresh rate queue with multiple refresh rates arranged from high to low, and controlling the DDIC to switch between different periodic refresh rates based on whether the upper-layer SF is sending images. When images are being sent, higher refresh rates provide smooth display; when images are not sent, the system periodically switches to lower refresh rates to reduce power consumption, creating an adaptive periodic operation pattern.
Data Source
AI summary
An image display method is provided. The method includes: a display driver of the electronic device obtains a display frame rate of an application and a minimum refresh rate of a display screen; the display driver configures a first-type refresh rate queue for a display driver integrated circuit when the display frame rate is greater than the minimum refresh rate; the display driver controls the display driver integrated circuit to refresh an image to the display screen based on a 1st refresh rate in the first-type refresh rate queue; and in a case that an SF does not send an image, the display driver controls, based on a rank order of refresh rates in the first-type refresh rate queue, the display driver integrated circuit to refresh an image to the display screen based on a next refresh rate in the first-type refresh rate queue.