Display Panel Regional Refresh Control for Video and Still Images
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Solution Overview
Problem
Display devices struggle to efficiently handle high-definition moving images with fast scene changes, particularly in areas displaying both videos and still images, as existing technologies do not effectively manage different content types at varying refresh rates.
Innovation Solution
A display device is driven at different frequencies for different parts of the screen, with one part operating at a high frequency for videos and another at a low frequency for still images, utilizing a data driver, gate driver, and timing controller to manage update and data voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire display screen is driven at high frequency to display high-definition moving images, then image quality and smoothness are improved, but power consumption increases significantly
Solution Approach 1:
The display screen is divided into multiple regions (first region and second region) that can be driven at different frequencies. The first region displaying moving images is driven at a first frequency while the second region displaying still images is driven at a second frequency, allowing selective high-frequency operation only where needed to maintain image quality while reducing overall power consumption.
Solution Approach 2:
Different regions of the display screen are assigned different driving frequencies based on their content requirements. Regions displaying dynamic content receive high-frequency driving for optimal image quality, while regions displaying static content operate at lower frequencies, optimizing the balance between image quality and energy efficiency locally across the display.
2Use of energy by moving object
If the display device is divided into multiple regions with different driving frequencies, then power consumption is reduced, but the complexity of the driving control system increases
Solution Approach 1:
The driving control system is designed to handle multiple driving frequencies simultaneously through a unified control architecture. The controller can switch between different frequency modes and manage both regions using the same basic control framework, reducing the need for separate dedicated control circuits for each region and thereby limiting the increase in overall system complexity.
3Use of energy by moving object
If different regions are driven at different frequencies, then energy efficiency is improved, but image consistency and color accuracy may deteriorate
Solution Approach 1:
The display device incorporates feedback mechanisms that monitor image quality and color accuracy across different regions. The controller adjusts driving parameters such as voltage levels and timing signals based on feedback signals from the display regions, ensuring that color consistency and image quality are maintained even when regions operate at different frequencies.
Solution Approach 2:
The system dynamically adjusts driving parameters including voltage levels, timing signals, and refresh rates for different regions based on their specific requirements. By optimizing these parameters for each region's content type and performance needs, the system achieves energy efficiency while maintaining image consistency and color accuracy across the entire display.
Data Source
AI summary
The present disclosure relates to a display device in which sub-pixels of a portion of a display panel are driven at a first frequency of a low frequency and sub-pixels of the other of the display panel are driven at a second frequency of a high frequency. A display device comprising: a display panel including a plurality of sub-pixels, a data driver configured to output one or more of a data voltage or an update voltage to the display panel, a gate driver configured to output one or more of a scan signal or an initialization signal to a sub-pixel of the display panel and a timing controller configured to output a timing control signal to the data driver and the gate driver, wherein the data voltage includes a voltage level corresponding to a gray value, and the update voltage includes a voltage level configured to swing between a turn-on level and a turn-off level.