Region-Specific Refresh Rate Control for Display Panels
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Solution Overview
Problem
Existing display devices lack the ability to dynamically adjust refresh rates across different regions of a screen, which can lead to inefficient power consumption and suboptimal image quality.
Innovation Solution
A display device and method that divide the screen into multiple regions based on the amount of data change in the source signal, allowing for different refresh rates to be applied to each region. The device includes a main controller to process the source signal and a timing controller to generate driving signals for the display panel, enabling the display of images at varying refresh rates across different regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If a uniform refresh rate is applied across the entire screen, then image quality is maintained consistently, but power consumption increases unnecessarily in regions with minimal data changes
Solution Approach 1:
The screen is divided into multiple regions based on data change characteristics. Regions with high data changes (motion areas) are separated from regions with low data changes (static areas), allowing different refresh rates to be applied to each segment. This segmentation enables the display to reduce refresh rates in static regions while maintaining high refresh rates in motion regions, thereby reducing overall power consumption without compromising image quality where needed.
Solution Approach 2:
Different refresh rates are applied to different regions of the screen based on their specific characteristics. High refresh rates are applied to regions with significant data changes to maintain image quality, while lower refresh rates are applied to regions with minimal data changes to reduce power consumption. This local differentiation optimizes the balance between power consumption and image quality for each specific area.
2Reliability
If a high refresh rate is applied across the entire screen, then image quality is maintained optimally, but power consumption increases significantly
Solution Approach 1:
The display screen is segmented into multiple regions based on data change characteristics. Regions requiring high refresh rates (with significant motion or data changes) are distinguished from regions that can operate at lower refresh rates (with minimal data changes). This segmentation allows the system to maintain optimal image quality in motion regions while reducing power consumption in static regions.
Solution Approach 2:
The system applies different refresh rates to different regions based on their local characteristics. High refresh rates are localized to regions where image quality is critical (high data change areas), while lower refresh rates are applied to regions where power saving is prioritized (low data change areas). This local quality differentiation optimizes the trade-off between image quality and power consumption.
3Use of energy by stationary object
If the screen is divided into multiple regions with different refresh rates, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The screen is divided into multiple regions based on data change characteristics, with each region capable of operating at different refresh rates. This segmentation enables power consumption reduction by applying lower refresh rates to static regions while maintaining high refresh rates for motion regions. The control system manages this complexity by automatically detecting data changes and assigning appropriate refresh rates to each region without requiring manual configuration.
Data Source
AI summary
A display device includes: a display panel including a plurality of pixels connected to a plurality of gate lines; a main controller configured to process a source signal and output an image signal; and a timing controller configured to output a driving signal to drive the display panel based on the image signal, where the main controller is configured to: divide a screen of the display panel into a plurality of regions based on an amount of data change of the source signal, and output the image signal to display an image at different refresh rates in each of the plurality of regions.