Display Panel Regional Refresh Control for Static and Dynamic Areas
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Solution Overview
Problem
Mobile device displays waste power due to uniform high refresh rates across all regions, affecting power consumption and display aging, despite static and dynamic regions having different image update needs.
Innovation Solution
A display panel with regional varying refresh rates, utilizing a region classification module to detect static and dynamic regions and a driving circuit to adjust refresh rates accordingly, maintaining high rates in dynamic regions and low rates in static regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high refresh rate is maintained across all display regions, then the display quality and image stability are improved, but the power consumption increases and display aging accelerates
Solution Approach 1:
The display area is divided into multiple independent refresh rate control regions, where each region can operate at different refresh rates based on its content requirements. This segmentation allows the display to maintain high refresh rates only in regions displaying dynamic content while using lower refresh rates in static regions, thereby reducing overall power consumption without compromising display quality in dynamic areas.
Solution Approach 2:
The refresh rate of each display region is dynamically adjusted based on the characteristics of the content being displayed. The system continuously monitors content changes and adapts the refresh rate in real-time, transitioning between high and low refresh rates as needed. This dynamic adjustment ensures optimal display quality when content changes while minimizing power consumption when content remains static.
2Reliability
If a high refresh rate is maintained across all display regions, then the image stability is improved, but the service life of the display panel decreases
Solution Approach 1:
The display panel is segmented into multiple refresh rate zones, allowing different portions of the display to operate at different refresh rates simultaneously. This segmentation enables the display to maintain high refresh rates only where necessary for image stability in dynamic content regions, while reducing stress on the overall display panel through lower refresh rates in static regions, thereby extending service life.
Solution Approach 2:
The refresh rate parameter is changed dynamically based on content requirements. By adjusting this key parameter from a fixed high value to a variable value that adapts to content characteristics, the system maintains image stability when needed while reducing the cumulative stress on the display panel, thus extending its operational lifespan.
3Use of energy by moving object
If a low refresh rate is used in static display regions, then the power consumption is reduced, but the display area must be accurately identified
Solution Approach 1:
The system performs preliminary detection of static and dynamic regions before applying different refresh rates. By identifying content characteristics in advance and preparing the appropriate refresh rate strategy beforehand, the system can efficiently transition to low refresh rates in static regions without requiring complex real-time adjustments, thereby reducing power consumption while managing detection complexity through proactive region classification.
Data Source
AI summary
Provided are a display panel with regional variable refresh rates and a driving method. The display panel includes: a region classification module for detecting in a display region of said panel row information corresponding to a static display region with an invariable picture and to a dynamic display region with a variable picture, and generating control signal groups of corresponding states; and a driving circuit for receiving a first control signal group corresponding to the static display region, so that drive voltages of related pixel rows of the static display region are output to the next row drive circuit, and an output signal of the drive circuit retains at a high level, or receiving a second control signal group corresponding to the dynamic display region, so that drive voltages of related pixel rows of the dynamic display region are output to both the next row drive circuit and the output signal of the drive circuit.