Display Sub-Region Refresh Control for IR Drop Flickering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices suffer from screen flickering issues in low refresh rate regions due to voltage drops (IR drops) on signal lines, particularly when switching between different display scenarios requiring different refresh frequencies.
Innovation Solution
A driving method and apparatus for a display panel that includes a first display sub-region and a second display sub-region. The method involves refreshing or performing display compensation on the first display sub-region when the change degree of display-related parameters in the second display sub-region exceeds a set degree, thereby mitigating the effects of IR drops and reducing screen flickering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the refresh rate of the first display sub-region is reduced to save power, then power consumption is reduced, but screen flickering occurs due to voltage drops when the second display sub-region refreshes
Solution Approach 1:
The patent implements dynamic refresh rate adjustment for different display sub-regions. The first display sub-region operates at a lower refresh rate (e.g., 1Hz) during static content to save power, while the second display sub-region maintains a higher refresh rate (e.g., 60Hz) for video playback. This dynamic configuration allows the system to adapt power consumption to actual display needs while maintaining display stability through selective refreshing.
Solution Approach 2:
The display screen is divided into multiple independent sub-regions (first display sub-region and second display sub-region) that can be refreshed independently at different rates. This segmentation allows the low refresh rate region to maintain stable voltage levels and avoid flickering, while the high refresh rate region provides smooth video playback, resolving the contradiction between power saving and display stability.
2Stability of the object's composition
If the first display sub-region is refreshed at the same rate as the second display sub-region, then display consistency is maintained, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the refresh rate of different sub-regions based on content requirements. When the second display sub-region displays video content requiring high refresh rates, the first display sub-region maintains a lower refresh rate for static content, achieving both display consistency and power efficiency through adaptive rate adjustment.
Solution Approach 2:
Different sub-regions of the display are assigned different refresh rates according to their specific needs. The first display sub-region uses a lower refresh rate for power saving, while the second display sub-region uses a higher refresh rate for video content, allowing each local region to operate with optimal quality characteristics.
3Reliability
If display compensation is performed on the first display sub-region, then screen flickering is reduced, but device complexity increases
Solution Approach 1:
The system implements display compensation by monitoring voltage drops in the first display sub-region and adjusting refresh timing accordingly. When voltage drop exceeds a threshold during high refresh rate operations in the second sub-region, the system compensates by adjusting the refresh rate or timing of the first sub-region, reducing screen flickering through feedback-based control.
Solution Approach 2:
The system performs display compensation by proactively adjusting the refresh rate of the first display sub-region before voltage drops cause visible flickering. By predicting when voltage instability may occur during high refresh rate operations and preemptively adjusting parameters, the system prevents flickering without requiring complex real-time correction mechanisms.
Data Source
AI summary
A display region of a display panel at least includes a first display sub-region and a second display sub-region. A driving method for a display panel includes: in the case where a change degree of display-related parameters of at least two refresh frames in the second display sub-region is greater than a set degree, refreshing the first display sub-region and/or performing display compensation on the first display sub-region. When the change degree of the display-related parameters of the at least two refresh frames in the second display sub-region is greater than the set degree to cause a change in the display brightness of the first display sub-region, the first display sub-region is refreshed, and/or the display compensation is performed on the first display sub-region.